| 摘要 |
PROBLEM TO BE SOLVED: To prevent a capacitor from puncturing even if an induced voltage generated by a motor is accumulated in the capacitor, and to prevent malfunction to be caused by noise. SOLUTION: An inverter device is provided with a motor 17 which generates an induced voltage, an inverter 15 connected with the motor, and a capacitor 13 connected with the motor via the inverter. The motor 17 and capacitor 13 are structured in such a way as to be electrically disconnected with a means of stopping the accumulation of the induced voltage, if the voltage value of the inverter exceeds the withstand voltage value of the capacitor, and if the rate of change of the current across the connection terminals at power supply side becomes lower than that of a reference current. Because the supply of the induced voltage to the capacitor 13 is turned off by detecting the occurrence of an abnormality in the inverter circuit, the voltage of the capacitor 13 never exceeds its withstand voltage. Thus, it is possible to protect the capacitor 13. |
