Patent ID: 8368362

Claim:
A boost-forward-flyback high gain converter comprising a boost converting circuit being connected to an external voltage source and an external control signal source as inputs, being coupled to a load, the control signal source sends a control signal to the boost converting circuit to activate voltage conversion between the voltage source and the load, the boost converting circuit comprising a switch having a control end receiving a control signal from the control signal source; a first end; and a second end, the control end; an input coil having a first end connected to the voltage source; and a second end connected to the first end of the switch; a boost diode having an anode being connected to the first end of the switch; and a cathode; and a boost capacitor having a first end being connected to the cathode of the boost diode; and a second end being connected to the second end of the switch and the voltage source; a forward converting circuit comprises an output coil being coupled to the input coil to form the transformer with the output coil and having a first end and a second end; a forward capacitor having a first end being connected to the first end of the output coil; and a second end; and a forward diode comprising an anode connected to the second end of the output coil; and a cathode connected to the second end of the forward capacitor; and a flyback converting circuit being coupled to the output coil and comprising a flyback diode having an anode being connected to the second end of the forward capacitor and the cathode of the forward diode; and a cathode; and a flyback capacitor being connected in series to the boost capacitor and the flyback capacitor, the boost capacitor being connected in parallel to the load and having a first end being connected to the cathode of the flyback diode; and a second end being connected to the anode of the forward diode; and a transformer being formed from the output coil in the forward converting circuit and the input coil of the boost converting circuit.