To provide a motor controller in which an FET of an inverter and an FET of a motor relay of an abnormal control system are not damaged during high revolution of a motor when the inverter of one control system becomes abnormal in a configuration where a motor having two system wiring is driven by an inverter of a two-system control system, and an electrically-driven power steering device mounting the same.SOLUTION: A motor controller includes control functions as follows. Between two-system wiring and a two-system inverter, a motor relay 122 composed of an FET is interposed. When abnormality is detected in any of the inverters, an upper stage and a lower stage FETs of inverter of a system in which the abnormality has been detected are turned OFF and all the FETs of the motor relays of the system in which the abnormality has been detected are turned OFF. When a motor rotation speed determination unit 140 determines that motor rotation speed is equal to or larger than prescribed rotation speed, the upper stage or a lower stage FETs of the inverter of an abnormal system is turned ON, and all the FETs of the motor relays of the abnormal system are turned ON.SELECTED DRAWING: Figure 7
【課題】2系統巻線を有するモータを2系統制御系のインバータで駆動する構成において、一方の制御系のインバータが異常となった場合に、モータ高回転時にも、異常な制御系のインバータのFET及びモータリレーのFETが破壊されないモータ制御装置及びそれを搭載した電動パワーステアリング装置を提供する。【解決手段】2系統巻線と2系統インバータとの間に、それぞれFETで成るモータリレー122が介挿され、インバータのいずれか一方の異常が検出されたとき、異常が検出された系統のインバータの上段FET及び下段FETをOFFすると共に、異常が検出された系統のモータリレーのFETを全てOFFし、モータ回転数判定部140によりモータ回転数が所定回転数以上であることが判定されたときに、異常な系統のインバータの上段FET又は下段FETをONすると共に、異常な系統のモータリレーのFETを全てONする制御機能を具備している。【選択図】図7
MOTOR CONTROLLER AND ELECTRICALLY-DRIVEN POWER STEERING DEVICE MOUNTING THE SAME
モータ制御装置及びそれを搭載した電動パワーステアリング装置
2019-04-04
Patent
Electronic Resource
Japanese
MOTOR CONTROLLER AND ELECTRICALLY-DRIVEN POWER STEERING DEVICE MOUNTING THE SAME
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