One-stop power supply

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UPS uninterruptible power supply operating temperature much relationship

Uninterruptible power supply is protected computer, at the same time it protects the device, which itself is to be maintained, UPS sophisticated electrical equipment, the internal temperature is very important, so good ventilation is necessary to choose the right place when you install the UPS, and Routine maintenance cleaning is necessary. Temperature have much relationship? Uninterruptible power supply is because the work in a suitable environment, not only make the machine stable job, but also to better extend the life of the machine. So do routine maintenance on the UPS uninterruptible power supply, it is very important to an online uninterruptible power supply computer work environment and working conditions should be the same, the temperature should be controlled at least 5 ℃, the following 22 ℃; relative humidity at 50% or less, up and down by not more than 10%. Of course, these factors also important to keep the workplace clean UPS power supply, no dust, no pollution, no harmful gases, since these factors also affect the life of the UPS and cause malfunctions. Power press work can be divided into two kinds of back-line. Backup UPS power supply when the normal electricity supply, the inverter does not work on a host, only when the mains power before the battery power supply, this approach does not change the quality of the mains. In UPS uninterruptible power supply is different, in the city is normal, it will first alternating current into direct current, the inverter immediately changed the battery power to the load, thus, UPS uninterruptible power supply output is the electricity grid completely Isolated pure sine wave power, it can greatly improve the quality of power supply, to protect the load work safely and efficiently. A new generation of UPS with bypass output function, and the composition of the hot backup system, to improve the reliability and stability of the power supply system. UPS uninterruptible power supply during operation, said the imbalance due to the characteristics of each cell changes over time, it is impossible to produce longer rely on UPS charging circuit inside the power supply to be eliminated, so this feature has obvious disproportion battery pack, if not promptly taken offline BC deal with the case, its uneven degree will become increasingly serious. UPS during routine maintenance work, the engineers need a daily routine inspection, its main purpose is to accumulate operating experience UPS uninterruptible power supply and the timely detection of faults signs, so be careful daily routine inspection. If you must use an uninterruptible power supply ups outdoors, the user must purchase a dedicated outdoor UPS products, as a dedicated UPS power supply to the outdoor temperature, as well as dust-proof, resistant to moisture and other advantages. For more information, please visit http://www.rendapower.com.

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Difference between Ups uninterruptible power supply and power supply

Ups uninterruptible power supply is a contained energy storage devices to the inverter as a major component of the constant voltage constant frequency of uninterruptible power supply, into the reserve, on-line and on-line interactive, usually as the enterprise group backup UPS power supply using the server, as emergency power, as can access to electricity, this time UPS power supply is an AC mains voltage regulator, while also charging the battery into the machine; when the electricity is interrupted, UPS will immediately internal battery power, the continued supply of 220V AC power to the load through the inverter conversion method, so that when the power to listen to when you can guarantee will not power down the server room. Power supply, there is no such function, and it cannot be provided by the server when the power failure back-up power, it is only for voltage instability designed primarily as a back-end equipment protection purposes, the device features a more complete protection If your unit voltage instability, fluctuated at a low case can be a power supply, but also to listen to power the machine no electricity, ups the power of both the role of regulator, but also when the emergency power supply. If you can according to their actual situation to choose to buy your product, if not stop it once a year also, then you can choose to buy power supply to protect their machines stable, of course, if you often listen to electricity, to buy Flying ups uninterruptible power supply is necessary. For more information, please visit http://www.rendapower.com.

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UPS uninterruptible power evolution（part 2）

Since the 1980s, UPS uninterruptible power supply begin contain only one transformer. Meanwhile, with the range of power semiconductor devices, bipolar power transistors, and the emergence of electronic control stage IGBT power semiconductor devices, the inverter circuit of the thyristor device is substituted, but this is still the UPS output transformer continued and lasted until the beginning of the twenty-first century, during which despite a transformer less inverter structure in 1995, however, applies only to such products less than or equal to 30kVA of power UPS. Main reason for this situation is the large loss of power semiconductors commutation, and high voltage requirements and make it difficult to do under the conditions of the transformer successfully produce large capacity inverter. APC's solutions are equipped with automatic detection circuit breaker size, PDU circuit location and branch current monitoring function, in order to bring more practical benefits. These functions are compatible with capacity and change management module InfraStruXure solutions, to better achieve automatic branch current setting, adjusting and balancing. The ac frequency converter using IGBT devices, transformer secondary winding with a star connection. Each primary winding is connected to the midpoint of the two branches of the variable frequency drive inverter, it is actually composed of three single-phase full-bridge inverter control. Thus, the secondary winding voltage is obtained independently adjusted, it is effective to ensure a good balance of the output voltage, irrespective of whether the three-phase load current in balance. Use bridge connection components can transform the frequency of each branch transformation frequency is reduced relative to the nominal 1/2, so that each branch only work within 1/2 cycle sine wave. Only one inverter (three-phase full-bridge), this transformer coupling using a side triangle / secondary winding star connection. This connection can be achieved two additional functions. First, it can be real time (immediately, instantaneously) to adjust the output voltage of each phase and each phase output voltages corresponding to the inverter branch. In addition, Z-shaped secondary side of the transformer connected load absorbed 3n-order harmonic current to the transformer primary winding, so these harmonic currents only flow in one inner side of the winding, so that can reduce the IGBT commutation current, thereby reducing commutation losses.  For more information, please visit http://www.rendapower.com.

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UPS uninterruptible power evolution（part 1）

The initial UPS power output of the inverter with an output transformer are. It should be said, using the output transformer is UPS inverter output circuit in the form of the decision, and the presence of the transformer is more harm than good. An solar power inverter circuit technology evolution significant manifestation is: Is it necessary to use a transformer, how to configure the transformer, if possible to remove the transformer. UPS uninterruptible power supply includes a step-down autotransformer winding powered by a diode full-wave rectifier and a rectifier connected in parallel, the auxiliary secondary winding autotransformer powered SCR battery charger. When a power outage static switch can connect the battery pack to the DC bus power supply. The inverter 4 by the phase inverter operating in full-wave mode (in accordance with the fundamental frequency commutation), each associated with a three-phase inverter transformer primary winding connected (delta connected), then these secondary transformer secondary winding open (OpenPhaseTransformers) to be connected in a manner to obtain a synthetic output voltage. This four transformers were divided into two groups, each group contains a star and a Z-shaped (zigzag star) of the secondary winding, with 30 ° phase difference between the two secondary windings. This special connection eliminates n = 6k ± 1 (k is odd) times the voltage harmonics, which is equivalent to two 12-pulse rectifier phase-shifting transformer primary winding can be offset by 5,7 SUBHARMONIC waves. For the 3rd and 3n current harmonics per phase may occur in the transformer primary winding, and the delta connection to the primary winding offset. Thus, the output of the first harmonic of the need to filter out the 11th harmonic. Adjust the output voltage is the phase (0 <φ <180 °) to move between the two transformers to complete. Since we first need to filter out the 11th harmonic, so the output filter size is small, which makes inverters dynamic response to load changes quickly. In thyristor (SCR) is the basic circuit of the power device there is a commutation safety and power loss problems, in order to reduce energy loss and improve the control circuit, the next-generation system begins using a new pulse circuit, each thyristor It has its corresponding circuit interrupter. The entire apparatus requires only two transformers, to eliminate the n = 6k ± 1 (k is odd) harmonics, only one set of phase inverter 30 °, and 30 ° phase shift which is pre-set and each primary side of the transformer to the "pulse width modulation" way (PWM) to achieve voltage adjustment. In order to achieve the desired output voltage, the commutation circuit can be used in the above-described six times per cycle substantially fixed commutation pulse width modulation circuit (PWM). Number of transformers is reduced from four to two, but in order to further reduce the number of transformers, we have to improve the performance of the inverter circuit, in order to be able to achieve their goals by optimizing PWM, without having to use two sets of coupling transformer. Previously used two 30 ° phase shift transformer is to reduce the low-order harmonics (5,7 times), because their amplitude is large, they are more difficult to filter out. Ups backup power supply only one transformer. Circuit, the secondary winding of the transformer winding star connection, each inverter to 7 times the fundamental frequency of the DC voltage to the chopper. This is called a fixed frequency chopping chopper, designed to minimize distortion of the output voltage as well as the goal to reduce the size of the filter. Adjust the output voltage of the phase shift through the inverter bridge between the two groups carried out. For more, please pay attention to part two or visit http://www.rendapower.com.

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VFD’s industrial energy-saving advantages promote industrial upgrading

Industrial energy efficiency is becoming one of the core industries. Because of the frequency converter products feature flexible governor, in the field of electric power saving obvious advantages. From the current development trend, the industry will continue to follow the path of the drive speed energy development. The variable frequency drive inverter is an important component of equipment industrial control system, installed in the front end of the motor to achieve the speed and energy. The rear end of the main drag high-voltage inverter fan, water pump class load, the actual energy-saving effect of 30% to 60%, the industry will benefit from the future development of the market transformation of medium-sized projects; low-voltage inverter and control layer and execution layer device composed automation and control systems, which will benefit the future development of the manufacturing sector "equipment upgrade." Variable frequency drive obvious advantages for industrial applications industrial planning second five clear Ac frequency converter technology was first used on variable speed motor by controlling the on-off semiconductor devices changes the output frequency to achieve the back-end drag AC motor soft start, frequency control and improve running accuracy and implement over current , overvoltage, overload protection. Compare last mechanical speed control, frequency control of wide range, up to 100% to 5%; high-control precision can reach ± ​​0.5%; because it is stepless speed control, soft start the motor can be realized and the entire production system automatic control, thereby reducing the impact on power. Experts compared the effect of electrical equipment in several major energy-saving products, which drive efficiency up to 30% to 60%, just install the motor when used in front-end, small changes to existing equipment. Thus, in the "five" plan proposed upgrade manufacturing equipment and industrial energy saving projects, we established the future development of the industry will take the "speed control simultaneously," path. Down to products, is expected to automate the transformation of low-voltage inverter and the main line of import substitution, domestic enterprises will focus on developing control and drive technology; high-voltage inverter rely on national energy saving policy, the downstream is still electricity, metallurgy, cement and other large industrial equipment transform-based, high-performance products will stimulate competition domestically speed. For more information, please visit http://www.rendapower.com.

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Energy saving become a new topic of vfd industrial development

With the continuous improvement of industrial automation, the variable frequency drive has been very widely used, energy conservation and environmental protection as the core of China's industrial economic development, at the same time for our industry indicate the direction of sustainable development, but also effectively pulling our variable frequency drive inverter industry sustainable development, so that our industry continues to drive the industry to expand market share, and by virtue of the strong development of power has become an important point of China's industrial economic development. Frequency energy is mainly used in ac frequency converter motor speed through the implementation of changes in the mechanical properties change the drive to achieve the production process requirements of the occasion, more used in the fans, pumps. When the motor can run at the rated speed, the drive mechanism can only operate at a rated speed. When the production process requires adjusting the process parameters, the only way to force change through the system resistance increase (decrease) traffic, the motor is always running at rated conditions, resulting in waste of energy. Such as fans, pumps and other equipment governor traditional method is through adjusting the outlet (or inlet) of the baffle, the valve opening amount is adjusted to the wind and to the water, in addition to energy consumption in vain, but also increases the system accessories, but also increases the probability of a system failure. When using frequency control, if the flow requirement is reduced by reducing the pump or fan speed to meet the requirements. Taken together, the frequency converter 60hz to 50hz is mainly to achieve energy savings through power factor compensation and soft-start in two ways. Power factor compensation, due to reactive power line will increase heat loss and equipment, coupled with lower power factor resulting in lower power active power, reactive power consumption among a large number of circuits, equipment, inefficient use, waste. After using frequency control devices, the role of the frequency inverter internal filter capacitor, thereby reducing the reactive power loss, increasing the active grid. Energy saving soft start the motor hard to start grid will cause serious impact, while the grid capacity requirements are too high, a large current and vibration when you start to baffle and valve damage is great, the use of equipment, piping life is extremely unfavorable. The use of inverter soft start function will start the current scratch, reducing the impact on the grid and the power supply capacity requirements, to extend the life of equipment and valves, thus saving the maintenance cost of the equipment. But note that in using the drive on the "small horse cart" problem should be avoided. The reason for this problem is based on the working conditions at the time put into the design limits, so that the design and installation time to save money, many places have adopted variable frequency power is less than the motor nominal power setting. But with technology development, production technology conditions change, "small horse cart" problem inevitably arise, causing the drive cannot operate properly. Thus, during the trial frequency devices, as a precaution, the adjustment should be detected in advance to avoid these problems. In addition, the drive normal use 6 years to 10 years after entering the high incidence of failure prone, often appear burned components, failure protection function frequent movement and other symptoms, seriously affecting its normal operation. For more information, please visit http://www.rendapower.com.

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Power industry of high-performance energy-saving drive（Part 2）

At present, the industrial automation market established an extensive brand awareness drive manufacturers, RENDA GROUP profound power electronics-based R & D experience and technical strength, market success in the drive to establish a leading edge, its brand influence and product range widening application. Preferred achieve energy efficiency goals Renda Group official said, the variable frequency drive inverter business plays an important role in the overall business development Renda Group, which is one of the factors that variable frequency drive company continued to increase investment in research and development of technology products. Renda Group to drive the business layout, always around to help customers solve real problems and get the perspective of maximizing the energy-saving benefits of starting, which Renda Group always pay attention to enhance customer value concept of development of the same strain. Needless to say, R & D investment for the market demand, the result is fruitful. In the long-term accumulation of technology and painstaking research and development, the continuous improvement of Renda Power Inverter product line, continue to introduce highly competitive high-end products. In addition, for industrial customers to provide advanced, high-quality products, Renda Power will provide system solutions regarded as an important strategic drive business and achieve a solution provider to the drive turned gorgeous. According Renda Group relevant parties, Frequency inverter 0.4kw-560kw is RENDA GROUP inverter product family a typical product, is a major breakthrough in the drive Renda Group achieved in the field. As an independent research and production of medium voltage inverter system, frequency converter manufacturer centralized power electronics using the world's cutting-edge technology, high power factor, high reliability, high performance, multi-function, easy operation, easy maintenance, and other outstanding features. The series voltage inverter using SPWM control technology to help industrial customers in the production process to effectively enhance the level of control and operational efficiency of the equipment, to meet the process control requirements, more importantly, significantly reduce motor energy consumption, encourage customers to successfully achieve energy reduction exclusive goals. Practical application is to test the performance of "litmus test." It can be said, medium voltage inverter engineering and technical perfect combination of design and excellent performance won unanimous favor industrial customers, and has been widely used to promote the development of domestic well medium voltage drives market. For example, in Long steel 5 # blast furnace blower unit 27MW electrical frequency soft start projects, medium voltage inverter with excellent quality of the project applications easily resolved large capacity inverter, control requirements, Salvo technically complex challenge for the Dragon Steel in energy conservation, improve the technological level and achieved good results. From the inverter industry perspective, based on the huge size of the market, has attracted many companies to join the industry, competition has become increasingly fierce. Also, from the practical application of the important role of view, we need to be able to drive outstanding performance to help customers solve real problems for customers bring significant core value, which is the frequency inverter manufacturer of technical strength and research and development put forward a very high demand . However, with Renda Power as the representative of mainstream manufacturers, is a leading edge technology and R & D strength, effectively leading the development trend of the industry, to promote research and development of inverter technology to achieve even greater improvement. For more information, please visit http://www.rendapower.com.

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Power industry of high-performance energy-saving drive（part 1）

Since the "Twelfth Five Year Plan" introduced, energy conservation has become a business development is an important task. In the industrial sector, including the construction of energy-saving means of energy conservation, energy efficiency and energy conservation technologies, including energy-saving technology is the use of new technology, new equipment, new technology and comprehensive utilization methods to improve energy efficiency. Variable frequency drive inverter as a high degree of automation of electronic speed devices can not only improve processes, extend equipment life, increase productivity, more importantly, energy-saving variable frequency drive technology increasingly prominent role. Industrial energy "weapon" Under the impetus of new industrial development strategy, now equipment transformation and industrial upgrading domestic iron and steel, manufacturing, textile, electric power and other industrial areas are in full swing, while the growing competition in the market-based, energy saving has become to reduce production costs, improve product One important means of competitiveness. Insiders pointed out that the original purpose of the inverter is used to speed control, as technology development and social increasing use of energy efficiency requirements for energy efficiency in the field gradually. Mainly used in the energy saving through the implementation of ac frequency converter motor speed change, alter the mechanical properties of the drive to achieve the production process requirements of the occasion, more used in the fans, pumps. Use the drive motor system energy-saving rate is generally up to about 30%, in some situations up to 40% higher to 50% energy saving effect is very significant. We can say that the drive has become the development direction of electrical energy, and its market potential is enormous. However, the industry also said that the drive system is a high-tech high-tech products, involving a wide range of application technology, the development of production, industrial design has a very high demand. For example, insulated gate bipolar transistor (IGBT) is the core component of the inverter, IGBT current domestic market is still mainly owned by some of the leading technical advantages of foreign-funded enterprises to control. Furthermore, a high-end soft-start frequency pressure transducer applications, has a strong particularity, it is only with a strong technical strength of the manufacturers to meet the corresponding requirements. For more, please pay attention to part two or visit http://www.rendapower.com.

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Renda module UPS are nationally recognized by Passenger Railway Line

Since the railway passenger line information service platform for the expansion of continuous development in the railway passenger dedicated this project, as a professional UPS power supply manufacturers; Renda modular UPS power supply with high-quality products and perfect service system it has been widely recognized by users, and playing into between railway partnership. Since the railway passenger line information service platform involving a wide range of geographic span, carried and passenger information system encompasses all aspects closely related, so users of the UPS uninterruptible power supply system put forward three requirements: First, the reliability of the system to high, to ensure the normal operation of the power supply of security and information systems; secondly, with the increase in business development and load, battery backup systems can continue to expand, with easy expansion characteristics; and finally, the supplier can not only provide safe and reliable products, but also to provide emergency services, rapid, timely troubleshooting and problem. It is reported that, Renda all products meet ISO9000 quality certification standards, and at the headquarters factory Guangdong Shenzhen, through multiple rigorous testing. Railway Passenger Dedicated Line project was funded by the National Development and Reform Commission approved the construction of a total includes Triunfo, Shijiazhuang-Taiyuan, Fuzhou and Xiamen, Ningbo-Taizhou-Wenzhou, Zhengzhou-Xi'an and Wuhan-Guangzhou Passenger Line 6 information service platform. Railway Passenger Dedicated service platform, including ticketing systems, passenger service information system and other information systems including office automation systems, card management systems, cargo management system including. Power + in the transport sector has always had a good reputation, whether it is green energy efficiency, security or stability, are in line with the basic requirements of the user. Plus Renda perfect service system, shortening to the emergency service response time within five minutes, all locked Renda Passenger Line project is completed this six advantage. Power + module UPS system, to truly achieve a modular, independent individuals, including all the modules includes a system controller is intelligent, any module failure, will not affect the normal operation of the system, bring security to the load, reliable protection, provide users with high reliability power protection. As a result of advanced hot swap technology, Power + has outstanding scalability, allowing users to expand the system in accordance with the actual needs, the initial acquisition cost savings, while also meet future expansion needs of the user, and no special skills and training, only need plug in additional module. Repair and maintenance is also convenient many possible online operations. For emergency service user concerns, Power + system is also an advantage: a single module weighs only 9.5 kilograms, the lightest module on the market at present. Therefore, RENDA commitment module and engineers arrived at the scene at the same time, the real site response service too.  For more information, please visit http://www.rendapower.com

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Module UPS is a new generation environmentally friendly products

In recent years, national policy support for environmental protection is increasing. Each year investment funds are also increasing. Even a few years ago, it will be incorporated into the environmental assessment indicators among local, for environmental protection, but related enterprises stop production for rectification of the policy. It can be said that environmental protection is a theme of the times. A key factor is the future of any business development must be considered. Green features module is also highlighted in the "energy saving" concern in 2010, environmentally friendly products will be the best choice for users, regardless of daily consumer products, like RENDA Group or uninterruptible power supply products , both will "green" and "energy" in the first place. It is reported from China RENDA Group, not only from technology innovation and constantly develops low-power energy-efficient products, energy conservation will persist in the end as a public good. Familiar RENDA users know, RENDA worthy of modular ups specialist product areas in the module class reputation, its main product in the Chinese market Power + overall efficiency up to 96%, which means less power consumption and power Pollution. Power series including 1-3kva, 6-20kva, 10-80kva HF UPS and 1-120kva low frequency UPS power, especially modular UPS power supply series, not only provides users with a diversity of choice, in the stability of the system, environmental protection in terms of performance is very prominent. Currently, RENDA modular uninterruptible power supply products in the country up to the amount installed, users also covers finance, securities, government, education, health care, transportation, communication, power industries. RENDA GROUP CEO, said: "Environmental protection is a social welfare undertakings, nor is it an easy thing, need a lot of investment and perseverance, as power suppliers, RENDA willing to take up this mission, and constantly develop energy-efficient environmentally friendly uninterruptible power supply brands products for contribute to a cause of environmental protection. " RENDA entrusted with the mission not only for the company's own development, but also for the long-term development of human society. Products on the use of environmentally friendly products, we should be conscious of every citizen.  For more information, please visit http://www.rendapower.com.

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Modular UPS is the future trend(part 2)

Change the user concept, speak with the facts Although the modular UPS power supply has many advantages, but to really change the traditional concept of UPS uninterruptible power supply user is not so easy. According to Wang Liping, the current user accounts for the traditional UPS about 80%, so there is a huge market space in the module UPS while also facing enormous challenges. Wang Liping believes that now dominate the market mainly due to the traditional UPS that many users of the inherent concepts and ideas, do not want to take risks to try new things, but he believes that with the passage of time and a growing number of success stories emerge, user acceptance It will be increasingly high. Speaking of success stories, Wang Liping to the author describes a project he considered to be more proud of is that cooperation with China International Capital Corporation Limited. Currently, the gold has been Renda Group years old users, but just the beginning of the gold is not accept the concept of the module, and in Wang Liping, led the sales team's efforts, in 2004 for the first time choose the Power + product, because the product effect is very good, the latter more and more branches in the country began to use Power +. "And so we are very pleased that, modular uninterruptible power supply there is little damage to the gold in a very large amount of information, but also very, very important, which is why I make things I feel very excited. We are a new product in the country, new equipment, we succeeded in getting users to choose our products, the user has selected our product, I felt very good, and he is willing to long-term option in the future. At the same time, the investment bank is also important industrial users Renda Group, at the time we did not many can give the gold industry success stories, so the gold value of this product is really, really I think that can easily give him, the fact that the user is discerning. " In addition, Wang Liping revealed, Renda Group's modular UPS installed capacity in China is the largest, as there are already several hundred sets. "Foresee service", to provide users with more security We know the power of this industry, service mostly after "responsive", that is a problem for emergency response, it seemed like nothing bad. However, Renda Group has proposed a "predictable service" concept, and from the beginning of 2009, have started a "national inspection" activities, by engineers free, regular users of the product inspection, ready at any time to solve the problems found especially problems before they occur, can provide adequate warning and protective measures to effectively prevent the occurrence of a major fault. Although the free inspection potentially increasing the cost of Renda Group, but they think it is necessary, if we can solve the problem in the bud, it can reduce a lot of trouble to the user. "Our inspection is not a market activity, but systematic, standardized long-term work," Wang Liping stressed that "after we put the user's equipment is installed, it will probably do one month after the inspection trip to view the load situation change, to understand the user's actual usage of the product and make timely adjustments and improvements, which is to solve the problem in the bud. "In addition, as far as I understood, although Renda Group's products are generally the warranty period of two years, but if Renda Group a city engineer to go on, usually go there to do a patrol and old customers, to provide users with more security.  For more information, please visit  http://www.rendapower.com.

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Modular UPS is the future trend(part 1)

Even if the current traditional UPS still dominates, but the advantages of modular UPS has been in the industry emerge, modular UPS power supply with its unique advantages in the market gradually won the trust. Recently, the UPS module FRANCISCO interviewed Mr. Wang Liping sales director of professional manufacturers in China Renda Group, on the market and the development trend of China's modular UPS made in-depth discussion. Wang Liping said modular uninterruptible power supply market is the inevitable trend of development, Renda Group as a professional manufacturer of UPS modules, will strive for the user to create security and stability, green power environment. Modular UPS is the trend Renda Group is headquartered in China, a country known for high-tech, Renda Group also inherited this gene tech country has become a leader in the field of module UPS business. According to Wang Liping introduction, Renda product line is very rich, modular UPS, there are the traditional UPS, military UPS, DC power system, monitoring software, but in the end they decided in the Chinese market, mainly in the module-based UPS, the Renda Power + . This aspect stems from Renda Group advantages in terms of modular UPS, on the other hand also from module UPS market trends. It is understood that Renda Group of Power + users already covers almost all domestic major industries, including financial securities, government, education, transportation, communication, power, large group, intelligent building and so on, in some events, the meeting also has applications. In last year's Beijing Olympics, Renda Group made a 80K system, mainly for security prevention and control system and monitoring center. Wang Liping said module UPS can purchase according to actual needs of users, reducing the initial purchase cost of the user; the same module UPS has strong fault tolerance, problems with a module, spare module can instantly start. "I think the modular UPS will become the mainstream, but also the development trend," Wang Liping believes that "modular UPS users are interested in environmental protection, energy, machine efficiency, easy to expand and lightweight design characteristics, etc., from case to then the entire industry customers typical customer, we believe that the modular UPS is very good, just the beginning we do not recognize it, the future is bound to change, like televisions, are now watching the LCD TV, nobody again Consider bulky old-type television sets. " Create a professional module UPS In many uninterruptible power supply manufacturers have tended to focus on the current data center integration time, Renda Group insisted dedicated UPS positioning, Wang Liping that the "focus of the very important", it is also true, Renda Group to create a very competitive product, win a growing number of customers. Module UPS Renda Group's Power + is a parallel redundant UPS systems, single rack made of 1-10 rated capacity of 10kVA power modules, system controller and static switch composition, the system supports hot-swappable, user can be free to expansion. Meanwhile, Power + system also supports parallel redundancy between racks, providing maximum system capacity of 500kVA. According to Wang Liping introduction, Power + uses a CCM rectification control, on-line battery architecture, the original third-order inverter and synchronous forward fault-tolerant technology, is a combination of technical excellence and rigorous thinking module UPS products. Power + from all angles to enhance the product's usability, compact design, small size, not only effectively save room space, and because of the high overall efficiency, but also significantly reduce system power consumption and reduce cooling costs, energy saving and environmental protection. Since the start of 3G communications, Wang Liping expected next year communications carriers will be a big market UPS products. Wang Liping revealed to the author, by the end of the year Renda Group 25kVA modules will have to enter the domestic market, which is a very suitable product carriers. "25kVA machines at headquarters has been doing for two years, they are very carefully and conscientiously, to repeated testing, the first to test it in actual use, and the second is efficiency, and the third is the cost, the pursuit of high efficiency and low cost." At the same time , Wang Liping said 25kVA machine's appearance is very beautiful, more importantly, it is largely subverted the original technology, structure and design are improved a lot. For more, please pay attention to part two or visit http://www.rendapower.com.

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Thermal analysis of high-power high-frequency inverter

The variable frequency drive inverter is a variable speed motor to run and thus achieve the energy saving effect of the device, it is customary to the rated voltage between the motor 3kV to 10kV called high-voltage motors, it is generally for the run down the 3kV to 10kV high voltage environment of a motor development It called high-voltage inverter drive. Compared with the low voltage inverter, high-voltage inverter is suitable for high-power wind, water pump frequency control, can receive significant energy savings. The inverter is the use of power semiconductor devices will be the role of the on-off frequency to another frequency power conversion power control device. With the rapid development of modern power electronics and microelectronics technology, high-voltage power frequency control devices continue to mature, high pressure had been difficult to solve the problem, in recent years through devices in series or series units have been solved. Drive at a high temperature Notes: 1, carefully monitors and records all parameters of the inverter is displayed on the display unit, abnormal should immediately reflect 2, carefully monitor and record the ambient temperature frequency chambers, environmental temperature should be between -5 ℃ ~ 40 ℃. Phase-shifting transformer temperature rise should not exceed 130 ℃ 3, when the summer temperature is high, should strengthen the drive to install ventilation site. Ensure that ambient air does not contain an excessive amount of dust, acids, salts, corrosive and explosive gases 4, summer is the rainy season, should prevent rainwater from entering the inverter (such as rain downwind tells air to enter) 5, filter Netcom often drive on the door should be cleaned once a week; such as work environment dusty, cleaning interval should be shortened based on the actual situation 6, the drive normal operation, a standard thickness of A4 paper should be firmly adsorbed on the door air inlet filter online 7, inverter room must be kept clean and tidy, it should be cleaned at any time according to the actual situation. 8, frequency room ventilation, lighting must have good ventilation and cooling equipment (air conditioning, ventilation fans, etc.) can operate normally. In large-scale power electronic devices, as the temperature increases, the failure rate increases, so power high-voltage inverter power devices is directly related to the thermal design of the equipment reliability and stability. High-power high-voltage inverter often require high reliability, affecting the main form of power electronic equipment failure is thermal failure, according to statistics, more than 50% of the electronic thermal failure is mainly caused due to a temperature exceeding the rated value. From the structural design for the cooling technology is to ensure the normal operation of the key. Since the frequency converter manufacturer’s equipment tricycle power, usually MW class, during normal operation, it will generate a lot of heat. To ensure the normal operation of equipment, the amount of heat dissipated, cooling and ventilation optimization program, properly designed and calculated to achieve efficient cooling equipment, for improving the reliability of the equipment is necessary. Cooling Calculation High frequency inverter in normal operation, the main source of heat isolation transformer, reactor, power unit, a control system, in which the heat as the main circuit of power electronic switching devices, the power unit of thermal design and power cabinet cooling and ventilation design most important. Igbt power devices on or igct, its pn junction should not exceed 125 ℃, Package shell 85 ℃. Studies have shown that temperature fluctuations over component ± 20 ℃, its failure rate will increase 8 times. Thermal Design Considerations (1) selection of heat resistance and thermal stability of components and materials to improve their allowable operating temperature; (2) reduce the equipment (devices) internal heat. Therefore, it should be more choice of micro-power devices, such as a low-loss type igbt, and minimize the number of heating components in circuit design, while optimizing the switching frequency of the device in order to reduce the heat; (3) the use of appropriate cooling mode and with the appropriate cooling method to reduce ambient temperature, speed up the cooling rate. For more information, please visit www.rendapower.com.

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Data center - behind the power of the Internet age

The most typical feature of the 21st century is to connect. From a business and innovation to transportation and personal applications, our lives most of the time spent on the Internet: watching video on tablet; in the side line up side Starbucks refresh micro-letter messages. We buy direct from fresh groceries, liberally step leasing electric cars, restaurant reservations on Baidu rice, and more and more we use Paypal and micro-letters and other electronic payment application, to pay for our above activities. All the places connected to happen - the pillar of the digital world, is the data center. Data center is located behind the scenes, but it is the real world will be valuable information storage and retrieval place is to make those digital tasks is now indispensable possible platform. As more companies will shift their computing to the cloud, as well as emerging economies, the user enters the network, one of the most pressing issues facing the Internet is how to better manage and build a data center in response to consumers, and businesses expect output growth and energy challenges. Suddenly, flocks of office workers began to return to the front desk and log their high-speed networks. At a distance where the nearest data center, thousands of server starts running, in order to achieve these millions of network connection and an Internet always give people the illusion magically in a ready state. In the far other end of the world, New York's Face book users have come home from work and sign his own Face book page from their latest data center hundreds of miles away to make the site load almost instantly on their home page content and photos. The average user may not see the inner workings of the Internet situation, but our favorite sites and applications running slowly or suddenly crashes, we certainly feel very troubled, especially in the time we need them most. The ability to handle huge data center peak activity is based on server capacity. One of the most important functions of data center capacity is forecast, which is the key activity peaks and surges processing, which often appear in high-profile startups start, Black Friday online sales letter site or a flow that due to review and quadrupled in the case of. In the data center, how do you forecast demand in peak periods server? How to accurately determine which rack at the peak of the need to increase the server, trough which servers need to be closed in order to reduce energy consumption? In order to make the normal operation of the server, how to maintain the proper temperature and humidity? With the continuous development of the Internet, these conditions have become more urgent. New digital tools are emerging to make it easier to manage these important functions, and get accurate data to improve energy efficiency. For example, any of UPS power network management humane: Chinese / English (optional) LCD display panel that provides UPS uninterruptible power supply working environment and working conditions and accurate information to the user, allowing users to UPS well known; through interfaces with RS 2 3 2 Smart modular uninterruptible power supply monitoring software can communicate with the computer, the various parameters of UPS clear displayed on the communications interface; external SNMP adapter, backup UPS power supply with remote network management capabilities to provide immediate information on UPS and power information through a variety of network management systems communication and management. Such management personnel anywhere in the world, you can use your tablet, phone, or in the data center remote access to this information. These data centers behind the scenes to maintain our way of life now. Important information into the hands of the data center manager’s intelligence tools, and a new type of lean construction is the key to optimize the data center. These data centers are evolving to the Internet to do to prepare. With increasing data center performance, we will get faster Internet speeds, higher reliability and efficiency, and reduce the impact on the environment. All of which also provide a representation that Internet users simply click on the browser, the required content will magically appear in front of us. For more details, please visit http://www.rendapower.com.

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Renda energy-efficient modular UPS booster "Made in China 2025"（part 2）

Thanks to these Advanced modular uninterruptible power supply, the major manufacturers have launched their own modular UPS power supply, any energy-efficient modular UPS Electric Appliances Industrial Co., Ltd. is one of the outstanding representatives. As one of the industry's first modular UPS manufacturers introduced, it embodies any accumulation of up to 20 years on high power UPS technology, but also a collection of contemporary UPS numerous cutting-edge technology, both to fully meet the user for high-power backup UPS power supply 's needs, while achieving greater energy efficiency, and in the practical application also reflects the hot-pluggable, flexible expansion, easy to maintain, with the need for more construction and other characteristics, and become a leader in modular UPS. It is worth mentioning that there is another significant that this product is widely used by its modular UPS strong evidence of high availability. As outstanding representatives of modular UPS, and any of the modular UPS products have the following characteristics: 1.UPS system modular design, N + X redundancy, hot-swappable line upgrading and expansion. 2. The superior load carrying capability and adaptability with, super grid adaptability. 3. Green energy-saving power: overall efficiency greater than 95%, input power factor greater than 0.99, the input current harmonics less than 3%. 4. The power module with dual DSP controller module independent control, no single point of failure risk. 5. rectifier, inverter, charge, discharge to achieve full DSP digital control. 6. The use of IGBT modules rather than discrete devices, which greatly improved the reliability of the power module and the system. 7. full front maintenance, providing up and down the line, convenient user connection. 8. Large screen touch screen, rich amount of information. 9. The independent charging systems, powerful charging capabilities, improved battery management solutions. 10. The all-digital modules in parallel technology, excellent circulation indicators. 11. Can be installed close to other equipment, save room space. 12. The redundant intelligent fan speed, low-noise and energy saving. 13. The outstanding performance of the generator match. 14. The battery can be started directly (cold start), easy to operate. At present, any of the modular UPS power supply box has been in government, telecommunications, finance, education, public security, electricity and other key industrial users of small and medium sized data center, computer room has been widely used, its hot-swappable, and the level of demand expansion energy efficiency and other characteristics can maintain the load, in the actual operation of the user to satisfy high system availability, high energy efficiency, high scalability and many other needs. With the "Made in China 2025" strategy to accelerate the deployment, to booming domestic UPS market new impetus, but also brought new challenges for the industry players need to close manufacturing innovation in product development design, intelligent, green trends, delivering innovative products to meet the special needs of the new era. Among these, the Renda will be relentless spirit of innovation and the line shoulder to shoulder with the Chinese manufacturing industry, with its long-term technical precipitation, combined with excellence in design, manufacturing help upgrade their contribution to China from a big country into the ranks of manufacturing power a force.  For more information, please visit http://www.rendapower.com.

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Renda energy-efficient modular UPS booster "Made in China 2025"（part 1）

German Industry 4.0 from concept hot, to put forward the "Made in China 2025", the new round of industrial revolution emphasized the importance of "industrialization" and "information" fusion, in this context, ensure the safety of high-end systems, equipment run becomes extremely important, and this cannot but involve where to play "patron saint" role of UPS uninterruptible power supply applications. In fact, top uninterruptible power supply brand has been playing an important role in social development. Energy is a major energy development, protection of the entire community of normal production running smoothly. With the large number of applications of various high-end, sophisticated equipment, to supply more and more high quality requirements, requires not only continuity of supply to get reliable protection, but also for the power of purity but also has special requirements. This excellent performance you need to configure UPS uninterruptible power supply, to meet the social development of the special needs of power protection. In the data center, for example, either in construction or operation, and the power-related investments can not be discounted. According to the survey of the relevant bodies, in a typical construction costs T3 grade data center, and power supply related (including transmission and distribution, UPS, etc.) of investment is almost (twice the cost of building works) half of the total cost; In the operational expenditure data center, the four-year tariff data center may exceed the total investment. Therefore, in the data center construction period to reduce power-related capital investment, reduce power consumption in the operation period it has become a very important job, and these two points are of a certain relationship with the UPS. Modular uninterruptible power supply is largely due to the emergence of the shortcomings of the traditional UPS. Practice has proved that the long-term application of some of the weaknesses of the traditional UPS. For example, in order to ensure the reliability of conventional UPS generally use the "1 + 1" or "N + 1" and the machine, high upfront investment; secondly, the traditional UPS poor scalability is often necessary to put in place from the outset the basic investment wasted ; third, because the traditional UPS deployment is one step, but the work load of the data center is escalating, pre-tend to be small, which leads to energy efficiency is much lower than the actual design of energy efficiency. The modular UPS redundancy, and can achieve gradual investment, investment according to business change, while the high energy efficiency, in line with the trend of modular data center, thus from a listing by users. For more, please pay attention to part two or visit http://www.rendapower.com.

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UPS measure error consequences

At present, with the in-depth application of the data center in all walks of life, the attention of industry data center also is heating up, speaking of data center, will have to mention KW and KVA, confusion between the difference between the two units for many years for many people, but also triggered the UPS uninterruptible power supply capacity of misunderstanding. If my UPS capacity size wrong choice will appear what problem? If you wrongly estimated data center UPS capacity size, will explode. If your UPS system capacity estimation, small problem is obvious. When the power in the data center load more than tolerance, top ups power supply brand will be shut off the power into the bypass mode. IT workload will is good for most of the time the unfiltered utility power. Modern computer equipment without a generation version of high sensitivity, this is the reason why economic model UPS popular. UPS bypass mode, however, the power failure or voltage drop, or is not provide protection for the power of the other important exceptions. Data center power supply design should specify an overload protection in bypass mode to handle the UPS audit or replace the resulting voltage transients. UPS power capacity excess led to the waste of money: additional capital on redundant 3 phase ups suppliers, which has never stopped for does not need to pay the power bills and the cost in a hot place for cooling. UPS capacity size exceeds 20% 30% is normal, is also acceptable. In the new IT system equipment update, beyond the capacity of the IT system peak capacity and short-term parallel operation provides extra space. But when the size is beyond 3 to 4 times as much as expected growth when waste is produced. If the administrator is difficult to predict capacity growth, consider the form of modular uninterruptible power supply. This form can allow you to increase the growth of the small unit, ensure that the power supply capacity on the power curve is highly efficient. UPS capacity miscalculation really care about is the size of the redundant system. A 100 kw, the N + 1 UPS, is composed of three modules of 50 kw, began to have a 33% additional capacity. Additional power supply capacity is as a backup. If your extra power is 30% (means you are running a 70 kw load), you can use 70% of the design capacity of 100 kw, but in fact is only 47% of the total 150 kw. The redundant system for modular UPS power supply is a very useful example.Have a relatively small modular system, a 100 kw, N + 1 system, each module is is 110 kw, 10 kw, in fact, the whole system under the condition of the working load is 70 kw, efficiency is raised to 64%. Size problem in 2 n redundant situation worse.UPS and workload is 1:1. Now the jobs of 70 kw 100 kw load per UPS to 35 kw, only 35% of the rated power, that is why we only need one UPS and to adopt modularization reasons, in order to avoid more redundant power supply capacity. China ups power supply is increased by 50% for 2 n capacity means that each power supply only 25% of the power supply capacity is in use.It will be a terrible aspect of efficiency curve. For more information, please visit www.rendapower.com.