The design of transformers generally only depends on the ਰੇਟਿੰਗ ਸਮਰੱਥਾ, ਨਹੀਂ ਰੇਟਿੰਗ ਬਿਜਲੀ ਦੀ, because its current is only related to the rated capacity. For the voltage source inverter, since its input power factor is close to 1, the rated capacity is almost equal to the rated power. The current source inverter is not the case. The power factor of the input side transformer is at most equal to the power factor of the load asynchronous motor, so for the same load motor, its rated capacity is larger than that of the voltage source inverter transformer.