Power frequency inverter is designed based on the traditional analog circuit principle, and the inverter circuit with power frequency transformer booster is used inside. It first inverts DC into power frequency low-voltage AC; Then through the power frequency transformer boost into 220V50Hz AC power for load use.

It has the advantage of simple structure and various protection functions can be realized at low voltage. Because of the power frequency transformer between the inverter power supply and the load, the inverter runs stably, reliably, has strong overload capacity and impact resistance, and can suppress the high harmonic components in the waveform.