| 摘要 |
PURPOSE:To prevent both elements from being put on simultaneously by stopping a timer under conditions where there is no possibility of generation of ON signal in one of the element when the other element is fed back from a load while the one element is driven by the timer. CONSTITUTION:To a direct current power source E1 a load circuit including an inductor L1 and a load (l) is connected through switching elements Q1 and a condensor C0. An oscillation current flowing in this circuit Z is fed back with a feedback coil n2 to only a control end of element Q1, and only the element Q1 is ON-OFF controlled at a specified cycle determined by the oscillation current. A control means X detects the OFF time of the element Q1 by a detection circuit 1, and at the OFF time a timer circuit 3 is triggered by a trigger circuit 2 to operate a timer and by the output of circuit 3 the element Q2 is put on for a fixed time. The means X stops operation of the circuit 3 under conditions where the element Q2 is not allowed to generate an ON signal when it stops operation of circuit 3 forcibly with an inverter stop signal circuit 4. In this way simultaneous on operation of the elements Q1, Q2 is prevented. |
