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

A cycloconverter with a tank circuit for induction heating which can deliver power to load keeping an input displacement factor at 1.0 is proposed in this paper. Static characteristics are analyzed using the switching functions and the mode functions and operation regions in which the input displacement factor is kept at 1.0 are found. A starting method which uses only a gate pulse sequence for thyristors to establish the tank voltage is proposed. The starting method is simulated to know feasibility. Experiments are carried out and the experimental results are in good agreement with the theoretical ones.