This paper presents an analytical model of a half-bridge series resonant inverter topology that is aimed at improving the design, control, and efficiency of resonant power converters. The model provides closed-form expressions of the main converter waveforms, output power, and efficiency, enabling fast design-space exploration and advanced control techniques to significantly improve converter operation. The analytical expressions were applied and verified in a half-bridge series resonant inverter for induction heating applications, proving the accuracy and effectiveness of the proposed model.

1. ANALYTICAL MODEL OF THE HALF-BRIDGE SERIES RESONANT INVERTER
FOR IMPROVED POWER CONVERSION EFFICIENCY AND PERFORMANCE
ABSTRACT
Resonant power conversion is a key enabling technology of dc–dc conversion, inverters
and contactless energy transfer systems. This paper presents an analytical model of the series
resonant half-bridge topology aimed at improving the design, control, and efficiency of resonant
power converters. The main contribution is a closed-form expression of the main converter
waveforms as well as output power and efficiency. This model enables a fast design-space
exploration, as well as the implementation of advanced control techniques using adaptive control
or real-time emulation, significantly improving the converter operation. The analytical
expressions presented have been applied and verified through a half-bridge series resonant
inverter applied to induction heating applications, proving the accuracy and effectiveness of the
proposed model.