| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that an AC voltage value cannot be recognized only by a detected value while an AC voltage is applied in a motor controller which drives a motor by switching the AC voltage directly. <P>SOLUTION: A motor controller includes: a voltage detection section 4 which detects a voltage value applied to an inverter main circuit 2; a drive control section 8 which drives a motor 3 by the inverter main circuit 2; a switch 9 to shut off the AC voltage applied to the inverter main circuit 2; and a switch control section 10 which controls the ON-OFF of the switch 9 according to a motor operation state by the drive control section 8. The motor controller recognizes as an AC voltage value a detected value of an AC voltage being applied, the AC voltage being converted into a DC voltage value, and performs motor drive using the AC voltage value. <P>COPYRIGHT: (C)2010,JPO&INPIT |
