PROBLEM TO BE SOLVED: To obtain a compact motor controller capable of preventing destruction of an inverter circuit or a motor, at a low cost, by suppressing increase in the phase current when three-phase short circuit processing was executed, and suppressing rise of capacitor terminal voltage and rise of phase current flowing to each phase of the motor, even when the inverter circuit is disconnected from a DC power supply.SOLUTION: A switching control section performing ON/OFF control of the switching element in a power conversion circuit has a three-phase short circuit processing command generation unit for starting three-phase short circuit processing at the timing when the maximum value of phase current absolute value of an AC motor after three-phase short circuit processing becomes minimum, when executing three-phase short circuit processing for turning all upper stage side switching elements or all lower stage side switching elements.SELECTED DRAWING: Figure 2

    【課題】3相短絡処理が実行された場合の相電流の上昇を抑制するとともに、インバータ回路が直流電源から切り離された場合であっても、コンデンサ端子間電圧の上昇および電動機の各相に流れる相電流の上昇を抑制し、インバータ回路や電動機の破壊を防止することができる小型の電動機制御装置を低コストで得る。【解決手段】電力変換回路のスイッチング素子をオンオフ制御するスイッチング制御部は、上段側スイッチング素子のすべてまたは下段側スイッチング素子のすべてをオンする3相短絡処理を実行する場合に、3相短絡処理後の交流電動機の相電流絶対値の最大値が最小となるタイミングで3相短絡処理を開始する3相短絡処理指令生成部を有している。【選択図】図2


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    Title :

    MOTOR CONTROLLER AND MOTOR CONTROL METHOD


    Additional title:

    電動機制御装置および電動機制御方法


    Contributors:

    Publication date :

    2017-10-05


    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 / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen



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