| 摘要 |
PURPOSE:To prevent a compressor motor from being over-loaded, over-excited and fluctuating in revolution when power supply voltage greatly fluctuates in a vehicular air conditioner equipped with a motor driven compressor. CONSTITUTION:The motor driven compressor is equipped with a DC/AC converting means (inverter) 4 converting DC voltage to plus or minus pseudo AC voltage in a rectangular pulse train shape, a DC voltage detecting means 7, and with a pulse duration changing means 8 changing individual rectangular pulse duration of the aforesaid pulse train in response to DC voltage detected by the aforesaid DC voltage detecting means 7. |
