PROBLEM TO BE SOLVED: To achieve efficient circuit configuration in which a booster circuit for a motor drive circuit can be used for backup for a motor drive circuit as well and motor drive can be continued even in an abnormal state of the booster circuit.SOLUTION: A motor drive device comprises: a booster circuit; a first switch provided between the midpoint between first upper and lower arms and a power source; a first connection line connecting a power source to the output part of the booster circuit; limiting means that limits the flow of a current toward a power source from the output part of the booster circuit; a plurality of motor drive circuits, each having second upper and lower arms; a second connection line for connecting the output part of the booster circuit to the second upper and lower arms of the motor drive circuits; a plurality of second switches provided, for each phase of a multi-phase motor, between the midpoint between the second upper and lower arms relating to a corresponding phase, and configured to selectively connect the multi-phase motor to either the midpoint between the second upper and lower arms relating to a corresponding phase or the midpoint between the first upper and lower arms; and a control device.SELECTED DRAWING: Figure 1

    【課題】モータ駆動回路に対する昇圧回路をモータ駆動回路のバックアップ用にも利用できる効率的な回路構成であって、昇圧回路の異常時にもモータ駆動を継続させることが可能な回路構成を実現する。【解決手段】モータ駆動装置は、昇圧回路と、第1上下アームの中点と電源との間に設けられる第1スイッチと、電源を昇圧回路の出力部に接続する第1接続ラインと、昇圧回路の出力部から電源に向かう電流の流れを制限する制限手段と、第2上下アームをそれぞれ備える複数のモータ駆動回路と、昇圧回路の出力部を、複数のモータ駆動回路の第2上下アームに接続する第2接続ラインと、多相モータの相毎に、対応する相に係る第2上下アームの中点と多相モータとの間に設けられ、多相モータを、対応する相に係る第2上下アームの中点及び第1上下アームの中点のうちの一方に選択的に接続する複数の第2スイッチと、制御装置とを含む。【選択図】図1


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    Title :

    MOTOR DRIVE DEVICE AND POWER STEERING DEVICE


    Additional title:

    モータ駆動装置及びパワーステアリング装置


    Contributors:

    Publication date :

    2016-07-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

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