Patent ID: 6525513
Filing Date: 2003-02-25
Classification: H02M,Y02B

Abstract:
A soft switching topological circuit in a power converter circuit, comprising:a current source, a main switch, a main diode, an auxiliary switch, an auxiliary diode, a resonant inductor, a resonant capacitor, a freewheel diode, and a first voltage source, wherein the resonant inductor and the resonant capacitor form a resonant circuit, wherein the current source, the resonant inductor, the main diode, and the first voltage source are connected sequentially to form a serial loop, the positive electrode of the current source is connected to one end of the resonant inductor, the other end of the resonant inductor is connected to the anode of the main diode, the cathode of the main diode is connected to the positive electrode of the first voltage source, the auxiliary switch is connected in parallel to the current source, the anode of the auxiliary diode is connected to the positive electrode of the current source, the cathode of the auxiliary diode is connected to the positive electrode of the first voltage source, the main switch is connected across the anode of the main diode and the negative electrode of the first voltage source, the resonant capacitor and the freewheel diode are in parallel with the main switch, and the cathode of the freewheel diode is connected to the anode of the main diode, wherein said main switch and said auxiliary switch are turned on or off periodically, said main switch being turned on at the same time as said auxiliary switch is turned off and said auxiliary switch being turned on only after said main switch is turned off for a predetermined period of time.