To ensure safety against a secondary failure while suppressing the number of current detection means.SOLUTION: A power conversion device for converting power from a power source and supplying the power to a motor having an n-phase (n is an integer of 3 or greater) winding, includes a first inverter that is connected to one end of the winding, a second inverter that is connected to the other end of the winding, a plurality of main current detection means which detects current flowing through both the first inverter and the winding, auxiliary current detection means the number of which is less than that of the main current detection means and which detects current flowing through at least one of a ground terminal and a power source terminal of the second inverter, a first control circuit that acquires a detection result obtained by the main current detection means, and controls the first inverter, and a second control circuit that acquires a detection result obtained by the auxiliary current detection means, and controls the second inverter.SELECTED DRAWING: Figure 2

    【課題】電流検出手段の数を抑制しつつ、二次故障に対する安全性を確保する。【解決手段】電力変換装置は、電源からの電力を変換して、n相(nは3以上の整数)の巻線を有するモータに供給する電力変換装置であって、上記巻線の一端に接続される第1インバータと、上記一端に対する他端に接続される第2インバータと、上記第1インバータと上記巻線との相互に流れる電流を相毎に検出する複数の主電流検出手段と、上記第2インバータの電源端とグランド端との少なくとも一方を流れる電流を検出する、上記主電流検出手段よりも少数の副電流検出手段と、上記主電流検出手段による検出結果を取得して上記第1インバータを制御する第1制御回路と、上記副電流検出手段による検出結果を取得して上記第2インバータを制御する第2制御回路と、を備える。【選択図】 図2


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    Title :

    POWER CONVERSION DEVICE, DRIVING APPARATUS, AND POWER STEERING APPARATUS


    Additional title:

    電力変換装置、駆動装置およびパワーステアリング装置


    Contributors:

    Publication date :

    2021-02-04


    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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