CURRENT INVERTER CONTROL METHOD Russian patent published in 2003 - IPC

FIELD: converter engineering; control systems for induction heating installations. SUBSTANCE: method for controlling current inverter operating into load in the form of parallel oscillatory circuit boils down to generation of control pulses and their alternate supply to valves shaping forward and backward voltage half-waves across load. Instant voltage value across load is measured, short sync pulse is shaped during moments when instant value of voltage across load crosses zero, number is given, time interval between moments when instant values of voltage across load are crossing zero is measured, second time interval within effective space of sync pulse is calculated by multiplying measured time interval by given number, and next control pulses are supplied to valves upon expiration of second time interval. Second time interval is counted starting from effective space of sync pulse. EFFECT: enhanced operating reliability of current inverter. 2 dwg