| 摘要 |
PROBLEM TO BE SOLVED: To provide a controller capable of correcting an offset value of a current with a simple structure even during the drive of an AC motor.SOLUTION: An AC motor drive controller 10 for controlling the drive of an AC motor 20, includes: a current detection part 11 that detects a current for driving the AC motor 20 at every predetermined time; and a calculation section 12 that calculates a provisional offset value of a current detected by the current detection part 11 by using plural current values, which are detected in a period of time equivalent to one cycle of a current signal, out of the current values detected by the current detection part 11 while the AC motor 20 is driven.SELECTED DRAWING: Figure 1 |
