Reducing Transformer Losses and Improving Performance
Transformers play a key role in the efficient distribution of power. However, during power transformation, they tend to lose energy, which gradually reduces their performance efficiency.
Therefore, to maintain its high performance efficiency, it is essential to understand the nature of those energy losses.
Types of Transformer Losses
Transformers typically experience two types of losses: Core (Iron loss) and Winding (Copper loss).
Iron Losses
Iron losses take place inside the transformer’s core because of its continuously altering magnetic field.
Hysteresis loss: Because the core material repeatedly changes its magnetic field, some energy is spent on realigning the magnetic domains. So, every time the magnetic field reverses, a transformer loses energy in the form of heat, which is known as hysteresis loss.
Eddy current loss: Eddy loss occurs when the alternating magnetic fields of the core induce circulating currents in the conductive core material, generating heat and adding more energy loss to the core losses.
Cores made of grain-oriented silicon steel or Amorphous material can significantly minimize iron losses. Amorphous cores are relatively more expensive, but are worth it in the long run as they also help reduce the extra power distribution costs due to energy loss.
Copper Losses
Copper wires show resistance to current flowing through the windings, causing copper losses. This energy is lost as heat.
High-resistance windings cause greater copper losses. So, if you use wires with larger diameters in the windings, they will reduce the resistance faced by current.
Also, the other good alternative would be going for material with lower resistance - like copper.
How to Boost Transformer Efficiency
It is important to keep transformers safe from overheating and insulation failures. This can be done by establishing excellent cooling systems that can handle the heat generated due to energy loss.
Here are two ways to provide proper cooling to transformers:
Air cooling: For dry-type transformers, fans can be used for cooling and improving air flow.
Oil cooling: This method absorbs heat and transfers it into the surrounding by circulating oil around the core and windings.
Solar transformers often include special winding configurations with enhanced cooling systems to minimize both iron and copper losses, enhancing the transformer's efficiency.
The other way to increase transformer efficiency is through regular maintenance:
Oil analysis: Conduct regular oil analysis to monitor the health of the transformer’s insulation and cooling capabilities.
Thermographic scanning: Employ infrared cameras to determine overheating and excessive losses early.
Have you been looking for an inverter duty transformer or other special application transformers? Please visit us at https://aetrafo.com.