PROBLEM TO BE SOLVED: To provide a motor controller and electrically-driven power steering device having the same, capable of completely protection of a motor opening switch with high reliability in connection with temperatures.SOLUTION: The motor controller includes: a control part which detects assist states of sensors and an inverter, turns on/off control of the inverter according to a detection result and detects presence/absence of abnormality; a motor speed detection part for detecting a motor speed; an energy arithmetic part for calculating a motor counter electromotive voltage and energy of a regenerative current by a data table on the basis of a revolution speed; and a determination part for turning off all FETs of a motor opening switch when energy is compared to a safe operating area of FET and the energy continues for a predetermined time in an area of the safe operating area, and turns off control of the inverter when a state detection part detects some abnormality.SELECTED DRAWING: Figure 9
【課題】モータ開放スイッチの保護を、温度にも関連させて確実に信頼性高く行うことができる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】モータ制御装置において、センサ類及びインバータのアシスト状態を検出し、検出結果に基づいてインバータの制御をON/OFFすると共に、異常の有無を検出する制御部と、モータの回転数を検出するモータ回転数検出部と、回転数に基づいて、データテーブルによりモータ逆起電圧及び回生電流のエネルギーを演算するエネルギー演算部と、エネルギーをFETの安全動作領域と比較し、エネルギーが前記安全動作領域の領域内に所定時間継続したときに、モータ開放スイッチの全てのFETをOFFする判定部と、状態検出部が異常を検出したときにインバータの制御をOFFする。【選択図】図9
MOTOR CONTROLLER AND ELECTRICALLY-DRIVEN POWER STEERING DEVICE HAVING 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
2016-09-15
Patent
Electronic Resource
Japanese
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