SWITCHING CONTROL METHOD AND SWITCHING CONTROL DEVICE

To provide a switching control method and a switching control device capable of suppressing the influence on the operation of a device equipped with a switching device during regenerative operation of a motor.SOLUTION: In a switching control method for converting battery power by PWM control and supplying the power to a rotating electric machine, and adjusting a carrier frequency of a carrier wave according to an operating point of the rotating electric machine, one of a first frequency mode for setting the carrier frequency to a first predetermined value on the basis of the operating point of the rotating electrical machine when the rotating electrical machine is in regenerative operation and the remaining charge capacity of the battery is equal to or greater than a predetermined threshold, and a second frequency mode for setting the carrier frequency to a second predetermined value is executed, and when the rotating electrical machine is in regenerative operation and the remaining charge capacity of the battery is less than the predetermined threshold value, the second frequency mode is executed regardless of the operating point of the rotating electric machine, and the average value of the carrier frequency is set higher in the second frequency mode than in the first frequency mode.SELECTED DRAWING: Figure 1 【課題】モータの回生運転中におけるスイッチング装置を搭載する装置の動作に与える影響を抑制し得るスイッチング制御方法及びスイッチング制御装置を提供する。【解決手段】ＰＷＭ制御によりバッテリの電力を変換して回転電機に供給し、回転電機の運転点に応じて搬送波のキャリア周波数を調節するスイッチング制御方法であって、回転電機が回生運転中で且つバッテリの残充電容量が所定閾値以上である場合に回転電機の運転点に基づいて、キャリア周波数を第１の所定値に設定する第１周波数モード及びキャリア周波数を第２の所定値に設定する第２周波数モードの何れかを実行し、回転電機が回生運転中で且つバッテリの残充電容量が前記所定閾値未満である場合に回転電機の運転点に関わらず前記第２周波数モードを実行し、第２周波数モードでは第１周波数モードよりもキャリア周波数の平均値を高く設定する。【選択図】図１