| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inverter device for driving an AC motor that can drive and control the AC motor in a desired state, even if there are delay time, a voltage drop of a switching element and the like between the command of a control circuit and the operation of the switching element. <P>SOLUTION: The inverter device 20, arranged between a DC power supply 10 and the AC motor 15, has an inverter circuit 50 that includes a first phase switching element pair 24, a second phase switching element pair 41, and a third phase switching element pair 45. Furthermore, the inverter device 20 includes a phase-voltage detecting means 60 that detects the phase voltage of an output wiring 65 extended from the connection point 64b of the paired first, second, or third switching element, and a control circuit 57 that controls the pulse width modulation of the paired first, second, and third switching element based on the detection result of the phase voltage detecting means. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
