| 摘要 |
PURPOSE:To reduce the capacity of the standard of switching circuit components by driving a relay controller by a DC rectified from an AC power source or of a DC power source, closing one and opening the other of AC and DC power source switches. CONSTITUTION:A control power source 8 is driven by an AC from an AC power source, and a generated DC is supplied to a relay controller 7. Am AC ON state is detected from a signal extracting resistor 8, an AC power source switch 9 is closed through the controller 7 to energize the primary winding 2-1 of a transformer 2. In case of a DC operation, the controller 7 and an inverter controller 6 are driven through the source 8 by the DC supplied from a DC power source D to close a DC power source switch 10. An inverter winding 2-1 is driven by a high frequency generated by energizing an inverter 5. The transformer 2 outputs from any of the primary windings 2-1, 2-2 to the secondary side. Thus, the switching can be performed by small-sized circuit components to reduce the cost. |
