MOTOR CONTROL DEVICE

• Main Author: OGURI HIROSHI
• Format: Patent
• Language: English; Japanese
• Published: 20.07.2017
• 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

PROBLEM TO BE SOLVED: To provide a motor control device enabling failure diagnosis of various abnormal states in a sensor or a detection circuit and capable of downsizing at low cost.SOLUTION: A d-axis voltage predicted value Vdref' and a q-axis voltage predicted value Vqref' are derived with data tables 14a, 14b storing the d-axis voltage predicted value Vdref' and the q-axis voltage predicted value Vqref' obtained in advance through experiments on the basis of a torque command value Tref, a rotation speed detection value Ndet, and a DC voltage detection value Vdcdet. Abnormalities of various sensors are detected on the basis of at least one of a deviation between the d-axis voltage command value Vdref and the d-axis voltage predicted value Vdref' and a deviation between a q-axis voltage command value Vqref and the q-axis voltage predicted value Vqref'.SELECTED DRAWING: Figure 2 【課題】センサや検出回路での様々な異常状態の故障診断を可能とし、かつ、低コストで小型化が可能なモータ制御装置を提供する。【解決手段】予め実験で求めたｄ軸電圧予測値Ｖｄｒｅｆ'とｑ軸電圧予測値Ｖｑｒｅｆ'を格納したデータテーブル１４ａ，１４ｂにより、トルク指令値Ｔｒｅｆと回転速度検出値Ｎｄｅｔと直流電圧検出値Ｖｄｃｄｅｔに基づいて、ｄ軸電圧予測値Ｖｄｒｅｆ'とｑ軸電圧予測値Ｖｑｒｅｆ'を導出する。ｄ軸電圧指令値Ｖｄｒｅｆとｄ軸電圧予測値Ｖｄｒｅｆ'との偏差と、ｑ軸電圧指令値Ｖｑｒｅｆとｑ軸電圧予測値Ｖｑｒｅｆ'との偏差と、のうち少なくとも何れか一方の偏差に基づいて各種センサの異常を検出する。【選択図】図２