Class E full-wave low dv/dt rectifier

An analysis and experimental verification for a Class E full-wave current-driven low dv/dt rectifier are given. Basic parameters of the circuit are derived using the time-domain analysis and Fourier series techniques. The rectifier diodes turn on and off at low dv/dt, yielding low switching noise and low switching losses. Diode parasitic capacitances do not adversely affect the circuit operation. The absolute value of di/dt is limited at diode turn-off, significantly reducing the reverse recovery current. The rectifier input voltage waveform differs only slightly from an ideal sinusoid, resulting in a low total harmonic distortion. The circuit has theoretically zero-ripple voltage and, therefore, zero loss in the equivalent series resistance (ESR) of the filter capacitor. The Class E full-wave topology has lower diode conduction loss than the Class E half-wave rectifier. The efficiency is almost constant over the load range from 10% to 100% of the full load. The rectifier offers high-power density and high-frequency rectification and is suitable for low-voltage and high-current applications, as shown by experimental results given for a 75-W rectifier which was operated at 1 MHz with an output of 5 V and 15 A. The theoretical and experimental results were in good agreement.<
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