| 摘要 |
PROBLEM TO BE SOLVED: To provide a power conditioner for photovoltaic generation that reduces the capability of destruction of, for example, a semiconductor switch element due to, for example, lightning surge without an increase in and high cost of a noise filter.SOLUTION: A power-supply circuit is configured by a first power-supply circuit 20 for supplying power to a control circuit 18 and a plurality of second power-supply circuits 21 for supplying power to gate driving circuits G1 to G5. The first power-supply circuit 20 is an insulating type switching power-supply circuit, a primary side is connected to a step-up chopper, an inverter, or a commercial power supply, a secondary side is connected to the control circuit 18, and a coupling capacitor 34 is connected between the primary side 32 and the secondary side 33 of the first power-supply circuit 20. The second power-supply circuits 21 are the insulating type switching power-supply circuits having smaller capacitance than the first power-supply circuit 20, primary sides are connected to the secondary side of the first power-supply circuit 20, secondary sides are connected to the gate driving circuits G1 to G5, and a coupling capacitor is not connected between the primary sides 42 and the secondary sides 43 of the second power-supply circuits. |
