To provide an auxiliary power unit and an electric power steering device which can commonize an auxiliary power supply to be used in boost and an auxiliary power supply to be used in backup.SOLUTION: An auxiliary power unit 13 comprises: auxiliary power supplies 24; and a booster circuit 30 which boosts input voltage. The auxiliary power supplies 24 are provided to be switchable between a serial connection mode in which the auxiliary power supplies are connected in series between an on-vehicle battery 15 and a motor 10, and a parallel connection mode in which the auxiliary power supplies are connected in parallel at a connection point P2 between the on-vehicle battery 15 and the motor 10. The auxiliary power supplies 24 perform backup for boosting voltage of the on-vehicle battery 15 by discharge voltage of the auxiliary power supplies 24 to be supplied to the motor 10 when it is switched to the serial connection mode, boosting the discharge voltage of the auxiliary power supplies 24 as input voltage of the booster circuit 30, and supplying the boosted discharge voltage to the motor 10 when it is switched to the parallel connection mode.SELECTED DRAWING: Figure 2

    【課題】ブースト時に用いられる補助電源とバックアップ時に用いられる補助電源とを共通化することができる補助電源装置及び電動パワーステアリング装置を提供する。【解決手段】補助電源装置13は、補助電源24及び入力電圧を昇圧する昇圧回路30を有している。補助電源24は、車載バッテリ15とモータ10との間にこれらが直列接続される直列接続態様と、車載バッテリ15とモータ10との間の接続点P2に並列接続される並列接続態様とで切り替え可能に設けられている。補助電源24は、直列接続態様に切り替えられたときに、車載バッテリ15の電圧を補助電源24の放電電圧によってブーストしてモータ10に給電し、並列接続態様に切り替えられたときに、補助電源24の放電電圧を昇圧回路30の入力電圧として昇圧し、昇圧した放電電圧をモータ10に給電するバックアップを行う。【選択図】図2


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    Title :

    AUXILIARY POWER UNIT AND ELECTRIC POWER STEERING DEVICE


    Additional title:

    補助電源装置及び電動パワーステアリング装置


    Contributors:

    Publication date :

    2020-07-09


    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 / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung



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