A new class-D voltage source series-loaded resonant inverter topology considering stray inductance influences

A new class-D voltage source series-loaded resonant inverter topology which can reduce the influences of the stray inductance is proposed. In the conventional class-D inverter topology, the stray inductance not only results in an overvoltage which gives the voltage stresses to the switches, but also in high frequency resonant currents during the turnoff transients. The proposed class-D inverter is superior to the conventional class-D inverter with respect to the reduction of problems due to the stray inductance. It is also more suitable for high power and high frequency inverters. The characteristics and the validity of the proposed class-D inverter are verified by both simulation and experimental results