| 摘要 |
A driver circuit for an inverter includes a switching circuit formed of a first switching element and a second switching element connected in series, which are turned on and off in complementary with one another; a first DC power supply connected parallel to the switching circuit; a first driver circuit connected to the first switching element for driving the same; a second driver circuit connected to the second switching element for driving the same; a second DC power supply connected to the second driver circuit for supplying electric power to the second driver circuit; and a first capacitor connected to the first driver circuit and having a charge-up path communicating with the second DC power supply. During an ON-period of the second switching element, the first capacitor is charged up through the second DC power supply and supplies electric power to the first driver circuit. A series circuit formed of a PNP transistor and a diode and are disposed in the charge-up path, and a resistor is connected between a base of the PNP transistor and a negative terminal of the second DC power supply. The second DC power supply can rise smoothly.
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