Inverter with constant duty cycle control

摘要: An inverter for driving an induction heating coil utilizes a constant duty cycle control circuit to optimize performance with the load coupled and removed from energized coil. To compensate increased period of oscillation when unloaded, operating frequency is automatically decreased reduce voltage current stresses on components. onoff sensor continuously senses parameter indicative condition, such as divider associated switch sensing thyristor anode voltage. The sensed information processed by in closed feedback loop manner vary gating signal repetition rate.