MOTOR CONTROLLER, COMPRESSOR, AIR-CONDITIONER, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To make it possible, in a motor controller applied to an air-conditioner or the like, to reduce noise or vibration of a motor while compensating for limitation on a response frequency of the motor controller.SOLUTION: A motor controller comprises: a power conversion circuit for converting DC voltage to AC voltage to drive a motor connected to a load device by using the AC voltage; and a control unit for outputting a drive signal for driving the power conversion circuit. The control unit estimates the motor's rotational angle position (axial error Δθ) and changes a duty ratio of the drive signal depending on the rotational angle position (axial error Δθ) in addition to an estimated or preset load variation pattern (torque difference estimation value Δτ).SELECTED DRAWING: Figure 14