| 摘要 |
PURPOSE:To simplify the circuit constitution as the whole to reduce the power supply capacity by outputting driving command signals to be given to bidirectional control rectifiers for individual loads as pulse signals whose phases are shifted from one another when plural loads are simultaneously driven. CONSTITUTION:Power is supplied from an AC power source 1 to plural loads 3-6 through a switch 2 and bidirectional control rectifiers 7-10. In case of simultaneous driving of loads 3-6, respective load driving command signals Sa-Sd are outputted as pulsative signals from a logic control circuit 48 with phases shifted from one another. Thus, trigger currents of rectifiers 7-10 do not simultaneously flow, and a large current does not flow in the logic control circuit 48. Consequently, the circuit constitution is simplified and the capacity of a DC power supply circuit 12 is reduced.
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