Characteristics and starting method of a cycloconverter with a tank circuit for induction heating

A cycloconverter with a tank circuit for induction heating is presented that can deliver power to load while keeping the input displacement factor at 1.0 is proposed. Static characteristics are analyzed using the switching functions and mode functions, and operating regions in which the input displacement factor is kept at 1.0 are found. A starting method that uses only a gate pulse sequence for thyristors to establish the tank voltage is proposed. The starting method is simulated to determine feasibility. Experimental results are presented that are in good agreement with theory