CONTROLLER OF MOTOR, AND COMPRESSOR AND REFRIGERATOR USING THE SAME

To provide a controller of a compressor capable of attaining both energy saving and suppression of compressor vibration.SOLUTION: A controller for a motor of a compressor arranged in a refrigeration cycle having a compressor that compresses a refrigerant and an evaporator that evaporates the refrigerant to generate cold air, can switch between current pulsation suppression control with relatively small power consumption and speed pulsation suppression control with relatively small vibration of the compressor, and executes the speed pulsation suppression control when the operating frequency of the motor is low and the evaporation temperature of the evaporator is high.SELECTED DRAWING: Figure 6 【課題】省エネ性と圧縮機振動の抑制との両立が可能な圧縮機の制御装置を提供する。【解決手段】冷媒を圧縮する圧縮機と、冷媒を蒸発させて冷気を生成する蒸発器と、を有する冷凍サイクルに配された圧縮機のモータの制御装置であって、消費電力が比較的小さい電流脈動抑制制御と、圧縮機の振動が比較的小さい速度脈動抑制制御とを切替えて実行可能であり、モータの運転周波数が低く、かつ、蒸発器の蒸発温度が高い場合に速度脈動抑制制御を実行する。【選択図】図６