What are the power losses in a transformer during operation? How can they be reduced?
Power losses in a transformer consist of two main parts:
- Core Losses (Iron Losses): These are caused by the transformer's core. When the coils are energized, the alternating magnetic flux induces eddy currents and causes hysteresis losses within the iron core. Together, these are referred to as iron losses.
- Copper Losses: These are caused by the electrical resistance of the coils themselves. When current flows through the primary and secondary windings, it generates heat due to resistance, resulting in power loss. This is called copper loss.
The sum of the iron losses and copper losses equals the total transformer loss. These losses depend on the transformer's capacity, voltage, and its load factor (utilization rate).
To reduce these losses:
When selecting a transformer, it is best to match the transformer's rated capacity as closely as possible to the actual load requirement. This improves the load factor. It is important to avoid operating the transformer under a light load (significantly below its rated capacity).
