Active Clamp Switching Circuit

An active clamp switching circuit comprising:

• a transformer, said transformer comprising a primary winding and a secondary winding, said primary winding having a first end coupled to the non-inverter input terminal of a power source and a second end opposite to the first end of said primary winding;
• a first switch, said first switching being a TRIAC having a first end coupled to the second end of said primary winding and a second end coupled to a first control signal and a third end coupled to the inverter input terminal of the power source of which the non-inverter terminal is coupled to said primary winding;
• a capacitor, said capacitor having a first end coupled to the first end of said primary winding and a second end opposite to the first end of said capacitor;
• an impedance device, said impedance device having a first end coupled to the second end of said capacitor and a second end opposite to the first end of said impedance device;
• a second switch, said second switch being a TRIAC having a first end coupled to the second end of said impedance device and a second end coupled to a second control signal and a third end coupled to the first end of said first switch;
• and
• a rectifier, said rectifier having one end coupled to the connection between said capacitor and said impedance device and an opposite end coupled to the first end of said first switch;
• wherein said capacitor and said impedance and said second switch form a reset loop for said primary winding so that said impedance device lowers the electric current going through said second switch to prevent burn-out of said second switch.