| 摘要 |
PROBLEM TO BE SOLVED: To reduce propagation of noise between a main circuit and a control circuit even in a power converter to which DC power is inputted.SOLUTION: A power converter 100 comprises: a main circuit 3 that converts DC power into AC power; a control circuit 7 that controls the main circuit 3; a main circuit power supply part 2 including power lines 2a and 2b that are connected to a DC power input part 1, and a smoothing capacitor 21, for supplying DC power to the main circuit 3; and a control circuit power supply part 5 including feeder lines 5a and 5b that are branched just near the input part 1, and a smoothing capacitor 51, for supplying DC power to the control circuit 7. A value of resistance of the feeder lines 5a and 5b in the control circuit power supply part 5 is greater than the power lines 2a and 2b in the main circuit power supply part 2. The control circuit power supply part 5 is characterized in that, in feeder lines 5ca and 5da in a control circuit feeder line branch part 5c that is a region from a branch point of the main circuit power supply part 2 to a connection point of the smoothing capacitor 51, a value of resistance and a value of inductance are greater than feeder lines 5da and 5db of a control circuit feeder line body part 5d.SELECTED DRAWING: Figure 1 |
