Abstract
Simple and economical digital schemes for burst control and direct digital proportional control for three-phase zero-voltage switching using single-phase sensing and CMOS digital ICs are explained. The schemes employ zero-voltage synchronous switching for both steady state operation and starting. The experimental results for a time base of 16 cycles for proportional type control with resistive loads are given, and they agree well with the theoretically predicted results. The circuits are expected to find extensive use in microprocessor-based power controllers.
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