CONTROL DEVICE FOR MOTOR

• Main Authors: ASAHINA KAZUKI, NAWA MASAMICHI, IDE TORU
• Format: Patent
• Language: English; Japanese
• Published: 24.07.2023
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

To shorten the time required for estimating a position of a rotor of a motor in a control device for a motor which estimates the position of the rotor using a high frequency current included in current flowing to the motor.SOLUTION: A control device 1 includes: an inverter circuit 2; an estimation unit 8 for estimating a position of a rotor of a motor M using a polarity of the rotor while determining the polarity; a current conversion unit 7; a current command value output unit 11; a voltage command value calculation unit 14; a superposing unit 15; and a voltage command value conversion unit 16. The estimation unit 8 calculates an evaluation value eh including a magnetic saturation component Ld1 using a high frequency current iγh included in a d-axis current Id and determines the polarity of the rotor in accordance with a code of the evaluation value eh.SELECTED DRAWING: Figure 1 【課題】電動機に流れる電流に含まれる高周波電流を用いて電動機の回転子の位置を推定する電動機の制御装置において、回転子の位置推定にかかる時間の短縮化を図る。【解決手段】インバータ回路２と、電動機Ｍの回転子の極性を判定しつつ、その極性を用いて回転子の位置を推定する推定部８と、電流変換部７と、電流指令値出力部１１と、電圧指令値算出部１４と、重畳部１５と、電圧指令値変換部１６とを備えて制御装置１を構成し、推定部８は、ｄ軸電流Ｉｄに含まれる高周波電流ｉγｈを用いて磁気飽和成分Ｌｄ１を含む評価値ｅｈを求め、その評価値ｅｈの符号に応じて回転子の極性を判定する。【選択図】図１