Analysis of class E inverter with switch-voltage elimination

This paper presents an analytical description of a Class E inverter with switch-voltage elimination. Using 16-digit-binary-driving patterns, switch-voltage pulses are eliminated from 1 to 15 in a series of 16 cycles. In each pattern of 2¹⁶ variations, the voltage and the current waveforms are numerically computed with Runge-Kutta formula. The waveforms are well agreed with observed waveforms of circuit experiments in both time domain and frequency domain. Based on the waveform data, their input power, output power, DC-equivalent resistance, harmonics, and low-frequency components are calculated and shown as functions of the output power. The analytical results show that, the output power can be controlled, without changing the operating frequency nor duty ratio, by eliminating the switch-voltage pulses. To gain a desired output power, one can choose an appropriate switching pattern based on the analytical results.