There is no sensor over-modulation technological development (continue) in the air conditioner of frequency conversion based on PE-PRO/ V8501A4
(have continuously)
Computer editor and display element can realize the data of the variable in 4 passways of display programs on the computer screen, facilitate the corrugate capture of the experiment, act as the bearing. Users can revise and reveal corrugate color, isoparameter of coordinate proportion, can also carry on arithmetic,etc. to the variable in different passways. This unit can assign the control command through the computer at the same time, such as systematic operation, stopping, set value of speed change etc..
The comprehensive development environment that PE-VIEW8 is a control procedure, it can carry out all homework from controlling the program development to control and debug. The system offers the supervisory function of raising the efficiency of development environment, including the essential function of compiling, downloading, carrying out / stopping etc. while controlling the program development, on this 6 groups, offer and control debugging to use tools: Display function of the real-time waveform, monitoring the function (the editting function of the memorizer variable) in real time .
PEOS and supports PE-VIEW8 to realize the basic software debugged in real time to form by the function storehouse used for raising the plate efficiency of various hardware control. In terms of function storehouse, it carries out the function storehouse needed in high-speed lambda calculus to form from the circumference I/ O and electric electronic control, can realize the characteristics of different hardwares through the function storehouse. Flow of program of the whole experimental system.
Systematic experiment of compressor of air conditioner of 2 Permanentmagnet Synchronism Motors one
In order to verify the significance of the method that this text adopts, has carried on experimental verification in the system of compressor of air conditioner of actual frequency conversion. The whole experimental provision is divided into three parts: Control system, system of compressor of air conditioner of Permanentmagnet Synchronism Motor one and compressor working condition presume the regulating device, . Among them, the control system adopts the electric machine control developing platform PE-PR0/ V850IA4 (see Fig. 6) of production of Myway Company ; The compressor of air conditioner system of Permanentmagnet Synchronism Motor one is a part in the true air conditioner; Compressor presume working condition regulating device use rigorous settlement and the intersection of regulation and the intersection of pressure, temperature,etc. and external terms that compressor work for, thus verify the result of this control method under different working conditions of the compressor.
Because of the above-mentioned experiment platform, we are in 3 kinds of motor speed (2040r/ min, 4080r/ min, 10080r/ min) separately ,2 kinds of pressure conditions (HP/ LP =1. 5/ O. 2MPa) Make experiment that 4 working conditions are lighted. PWM generator in the experiment has adopted SVPWM linear modulation and two kinds of tactics of single mode over-modulation, what adopted is that the model consult the adaptation method that the speed is estimated. Because the Permanentmagnet Synchronism Motor was not installed the mechanical sensor, it is unable to receive the actual motor speed, so the experimental result herein only provides and estimates the motor speed. When the pressure condition that the compressor of air conditioner supports is HP/ LP, experimental result, the utilization factor of voltage of one inch of inverters of this day is 0 respectively. 61 and O. 77.
Table 1 has summarized the electrical machinery under the circumstances that different rotational speed and different compressors of air conditioner are supported, adopt SVPWM linear modulation and contrast result of utilization factor of the inverter voltage at the time of over-modulation of the single mode. Can find out, after adopting the single mode over-modulation tactics, the utilization factor of the voltage of the inverter is greatly improved, close to its ideal maximum value (O. 78); And consider the influence of inert zone and minimum pulse width, while adopting SVPWM linear modulation, the utilization factor of voltage of the inverter should be lower than the maximum value of its theory (O. 71).
3 conclusions
This text directs against the service requirement in the district at a high speed of the system of compressor of air conditioner, adopt the single mode to pass odulation algorithm and based on MRAS and have no identification algorithm of the rotational speed of sensor, have realized that there is not system of compressor of air conditioner of Permanentmagnet Synchronism Motor one of over-modulation of sensor. The experimental result shows: The single mode that this text adopts crosses odulation algorithm and improves the utilization factor of voltage of the inverter effectively, have improved the strip load capacity of the high-speed runtime of the Permanentmagnet Synchronism Motor; MRAS that this text adopts does not have sensor control method and has good stability, in a situation that the compressor load torque is pulsed and passed modulating control causes the serious distortion of electric current of the electrical machinery, can the security system run steadily while being normal still. Myway Company PE-PRO/ V850lA4 development system used in this text has advantage such as being with perfect function, debugs and convenient and safe and reliable, it is a kind of high-performance electrical machinery experiment platform. This development system has offered the strong assurance for smooth completion that the stated experiment tested in this text.