| 摘要 |
PURPOSE:To eliminate influence of malfunction of a load to an oscillation by feeding back a vibration current flowing to a chopper type smoothing circuit as a drive signal of a switching element of an inverter circuit through a transformer. CONSTITUTION:A transformer T0 is used as electromagnetic energy storing inductance component of a chopper type smoothing circuit 3, and drive signals S1, S2 of two transistors Q1, Q2 of an inverter circuit 4 are supplied by a voltage obtained at the secondary winding n2 of the transformer T0. Thus, a vibration current of a power source AC side of the circuit 3 is fed back as the drive signals of the transistors Q1, Q2. Thus, even if a load l is abnormal, an influence to the oscillation control of the inverter circuit 4 can be eliminated. |
