ANALYSIS AND DESIGN OF CLASS-E ZERO-CURRENT-SWITCHING RECTIFIER

The analysis, design equations, and experimental results are presented for a Class E zero-current switching (low di/dt) rectifier. Equations governing circuit operation are derived, assuming an ideal sinusoidal input current source. The diode turns on at zero di/dt and low absolute value of dv/dt, and turns off at low absolute value of di/dt, reducing switching losses, switching noise, and reverse recovery effect. The diode junction capacitance is not included in the rectifier topology and causes ringing after turn-off. The experimental results measured at 0.5 MHz agreed with the design calculations. The rectifier can be used in high-frequency high-power-density switching power supplies. © 1990 IEEE