PROBLEM TO BE SOLVED: To provide a motor controller and electrically-driven power steering device having the same, capable of performing protection of a motor opening switch constituted in a small size using a semiconductor switching element with high reliability according to a failure mode.SOLUTION: The motor controller includes: a control part for turning on/off control of an inverter on the basis of states of sensors and an assist state of the inverter and detecting presence/absence of abnormality; a motor speed detection part; an energy arithmetic part for calculating energy of a motor counter electromotive voltage and a regenerative current by a data table on the basis of a speed and an abnormality mode; a determination part for turning off all motor opening switches when energy reaches an area of a FET safe operating area; and a state detection part for detecting presence/absence of abnormality on the basis of an abnormality detection part and information from the abnormality detection part, and turns on control of the inverter when the state detection part does not detect some abnormality and turns off control of the inverter when the state detection part detects some abnormality.SELECTED DRAWING: Figure 6
【課題】半導体スイッチング素子で小型に構成されたモータ開放スイッチの保護を、異常モードに応じて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】センサ類の状態及びインバータのアシスト状態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、モータ回転数検出部と、回転数及び異常モードに基づいて、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、エネルギーがFET安全動作領域の領域内となったときに、モータ開放スイッチを全てOFFする判定部と、異常検出部と異常検出部からの情報に基づいて異常の有無を検出する状態検出部とを具備し、状態検出部が異常を検出していないときにインバータの制御をONにし、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6
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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