| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply device that has a small circuit scale, mounting area, and power consumption compared with a case of using a transformer.SOLUTION: A low-voltage power supply 3 comprises: a DC voltage generation part 70 that generates a first DC voltage by rectifying and smoothing an AC power input from a main power supply 2 and converts the first DC voltage into a second DC voltage different from the first DC voltage and outputs the voltage to a control board 4; and an AC voltage detection circuit 22 that detects the first DC voltage obtained by rectifying and smoothing the AC power and outputs a result of the detection to the control board 4.SELECTED DRAWING: Figure 1 |
