There are two kinds of losses produced by the toroidal transformer during operation-iron loss and copper loss. The iron loss is caused by the iron core. When the coil is energized, the magnetic field lines are alternating, it causes eddy current loss and hysteresis loss in the iron core. This loss is called iron loss.Copper loss refers to the loss of electric energy generated when the primary coil and secondary coil of the transformer have current passing through. It is caused by the resistance of the coil itself.
When the loss of the toroidal transformer is small during operation, the working efficiency is higher. So how to reduce iron loss and copper loss?
1. Adopt a good-quality iron core and select high-quality cold-rolled silicon steel sheets to obtain high magnetic permeability to reduce hysteresis.
2. Choose a relatively thin iron core material to achieve the purpose of reducing eddy current loss.
3. To increase the voltage per turn, the simplest way is to reduce the number of primary turns as much as possible (it is worth mentioning that: reducing the number of primary turns can reduce the copper loss but also increase the no-load current).
4. Use larger diameter copper wire for winding.
5. The transformer should not be overloaded for a long time. Long-term overload operation will increase the temperature of the toroidal transformer, and naturally the loss will increase.