Characteristics Analysis of a Half-Bridge High-Frequency Inverter with Pulse Width Control

Abstract

The half-bridge high-frequency inverter using Static Induction Transistor (SIT) described in this paper can be formed as a current-fed type inverter or a voltage-fed type inverter. The SIT inverter is a low-cost one which has a quick response for output power control by Pulse Width Control (PWC). The circuit operation including the practical PWC mode was elucidated by introducing some normalized circuit constants and operating frequency. The characteristics of a half-bridge high-frequency inverter using SIT were discussed in this paper in comparison with current-fed type and voltage-fed type. The merits and demerits in output power control by PWC were studied for both type inverters. The characteristics of the output power control by PWC were substantiated on the basis of the numerical analysis and experimental results. Results of the characteristics analysis of the SIT half-bridge high-frequency inverter indicate that the inverter is effectively applicable to the static power controller.