Forward converter and forward power factor corrector

A forward converter, comprising:

• a voltage conversion device comprising a primary winding and a secondary winding and configured to convert an input voltage into an output voltage;
• a switch connected to the voltage conversion device and configured to be switched to make the voltage conversion device receive or not receive the input voltage;
• and
• an auxiliary device connected to the voltage conversion device, storing electrical energy released by the voltage conversion device and generating a compensation voltage when the switch is cut off, and providing the compensation voltage when the switch is turned on, wherein the compensation voltage and the input voltage have same polarity,
• wherein the auxiliary device comprises:
• an auxiliary capacitor;
• an auxiliary diode, wherein an anode of the auxiliary diode is connected to a first terminal of the auxiliary capacitor;
• and
• an auxiliary winding inductively coupled to the primary winding and the secondary winding, wherein a terminal of the auxiliary winding is connected to a cathode of the auxiliary diode, and another terminal of the auxiliary winding is connected to a second terminal of the auxiliary capacitor.