PROBLEM TO BE SOLVED: To provide a motor controller capable of accurately performing temperature detection of an inverter in a low-cost configuration without time delay and performing overheat protection control of electronic components according to the detected temperature, and to provide an electric power steering device mounted with such the motor controller.SOLUTION: A motor controller that controls driving of a motor via an inverter according to a current command value, comprises: a voltage detector which is connected to the inverter and detects the source voltage of a power source; a temperature detection element arranged on a wiring pattern of a circuit board between the inverter and the power source; a voltage dividing circuit that divides the source voltage with the temperature detection element and a resistor; a temperature detection unit that detects the temperature of the wiring pattern according to a divided voltage from the voltage dividing circuit and a voltage detection value detected by the voltage detector; and an overheat protection control unit that limits the current command value according to the temperature detection value. The temperature detection unit, using a preset temperature conversion table, detects the temperature of the wiring pattern without being affected by the source voltage.SELECTED DRAWING: Figure 5

    【課題】インバータの温度検出を安価な構成で、時間遅れなく正確に実施でき、検出温度に基づいて電子部品を過熱保護制御することが可能な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】電流指令値に基づいてインバータを介してモータを駆動制御するモータ制御装置において、インバータに接続された電源の電源電圧を検出する電圧検出部と、インバータ及び電源の間の、回路基板の配線パターン上に配置された温度検出素子と、温度検出素子及び抵抗で電源電圧を分圧する分圧回路と、分圧回路からの分圧電圧及び電圧検出部で検出された電圧検出値に基づいて、配線パターンの温度を検出する温度検出部と、温度検出値に基づいて電流指令値を制限する過熱保護制御部とを備え、温度検出部は、予め設定された温度変換テーブルを用いて、電源電圧の影響を受けることなく配線パターンの温度を検出する。【選択図】図5


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    Title :

    MOTOR CONTROLLER, AND ELECTRIC POWER STEERING DEVICE MOUNTED WITH THE SAME


    Additional title:

    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


    Contributors:

    Publication date :

    2017-09-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B62D MOTOR VEHICLES , Motorfahrzeuge / H02K Dynamoelektrische Maschinen , DYNAMO-ELECTRIC MACHINES



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