To overcome disadvantages of the circuits, an improved one is proposed, which consisted of diode full-rectifying-bridge and single-switch PFC circuit.

Since the utility model adopts the normalized full-bridge commutation, the power factor flowing to the electrical source system is 1, and the current can be reduced greatly.

Simulation results of making process for different phase angles of flow driven by full bridge rectifier are given and analyzed at rated and variable voltages in detail.