PROBLEM TO BE SOLVED: To provide a motor drive device by which a thermal load to a switching element protection circuit is reduced to reduce costs.SOLUTION: A motor drive device is provided with: a first substrate the surface of which is oppositely arranged to a motor; a second substrate arranged on a rear surface side of the first substrate; a switching element arranged on the first substrate; and a switching element protection circuit, at least a part of which, including a capacitor, is arranged on the second substrate, and which is connected in parallel with the switching element. Thus, a thermal load to the capacitor of the switching element protection circuit is reduced, and accordingly, it becomes possible to use a general inexpensive capacitor.SELECTED DRAWING: Figure 4

    【課題】スイッチング素子保護回路への熱的負荷が低減され、低コスト化が図れるモータ駆動装置を提供する。【解決手段】 モータ駆動装置は、表面がモータに対向して配置される第一の基板と、前記第一の基板の裏面側に配置された第二の基板と、前記第一の基板に配置されたスイッチング素子と、コンデンサを含む少なくとも一部が前記第二の基板に配置され、前記スイッチング素子に並列に接続されたスイッチング素子保護回路と備えている。これによりスイッチング素子保護回路のコンデンサへの熱的負荷が低減され、そのため一般的な安価なコンデンサを使用することが可能となる。【選択図】 図4


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    Title :

    MOTOR DRIVE DEVICE, MOTOR SYSTEM AND ELECTRIC POWER STEERING DEVICE


    Additional title:

    モータ駆動装置、モータシステム及び電動パワーステアリング装置


    Contributors:

    Publication date :

    2018-04-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    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 / B62D MOTOR VEHICLES , Motorfahrzeuge



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