| 摘要 |
PROBLEM TO BE SOLVED: To provide an inverter realizing reduction in cost and size. SOLUTION: A control means 10 controls the duty of ON/OFF state of a lower arm such that the voltage of a power supply 8 for drive circuit does not drop below a gate drive voltage immediately after turning on commercial power until a first waveform is outputted. Consequently, the capacitance of a power supply filter capacitor 9 for the drive circuit can be reduced and charging current to the capacitors 6a-6c in a charge pump circuit can be suppressed without requiring any resistor for suppressing the inrush current. |
