Abstract
A circuit topology for magnetron drive used active clamp quasi-resonant is presented in this paper. A resonant voltage of main switch is clamped for auxiliary switch and capacitor connected at main switch in series. One of advantage of the circuit is operation for PWM output power control under fixed frequency.
Power control limitation is able to extend by constant frequency PWM power control in a method of using a leakage type transformer with several windings supplies power for a magnetron. The variable power control extent is achieved from 100W to 800W for microwave output power. The paper concentrates subject on basic operation and characteristic of cathode current with the output control.
