Switch mode power supply for microwave heating based on the Boucherot effect

This paper describes a new self-resonating switch-mode power-supply for dri ving CW magnetrons, based on the Boucherot effect. A detailed circuit analy sis is given and its performance is evaluated for an 800W/2450MHz magnetron , whilst work at high power driving a magnetron up to 40kW is reported. A comparison of the supply with the conventional power-supply used in micro wave ovens is made and the principal features of the new design are found t o be: low energy dissipation under short-circuit conditions, low ripple cur rent and voltage waveforms that result in more precise control in the range 20-100% of rated power, high efficiencies and small size and weight.