PROBLEM TO BE SOLVED: To provide a step-up/down converter and a power supply system which are increased in the possibility of prolonging an operation time of a load even in the event of a failure.SOLUTION: A step-up/down converter 11 is connected between a lead battery and a lithium ion battery which are almost equally managed in service voltage range. The step-up/down converter 11 comprises switching elements Q1-Q4 and an inductor L1. In a power supply system, a control circuit 20 outputs gate signals S1-S4 for controlling the switching elements Q1-Q4. The control circuit 20 controls the gate signals S1-S4 so as to fix the switching elements Q2, Q4 in OFF state, and the switching element Q3 in ON state in the event of a failure in electrical continuity of the switching element Q1.SELECTED DRAWING: Figure 2

    【課題】故障発生時にも負荷の動作時間を延ばせる可能性が高まった昇降圧コンバータおよび電源システムを提供する。【解決手段】昇降圧コンバータ11は、使用電圧範囲がほぼ等しく管理された鉛バッテリとリチウムイオンバッテリとの間に接続される。昇降圧コンバータ11は、スイッチング素子Q1〜Q4と、インダクタL1とを含む。制御回路20は、スイッチング素子Q1〜Q4を制御するゲート信号S1〜S4を出力する。制御回路20は、スイッチング素子Q1に導通故障が発生した場合に、スイッチング素子Q2,Q4がオフ固定となり、スイッチング素子Q3がオン固定となるように、ゲート信号S1〜S4を制御する。【選択図】図2


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    Title :

    STEP-UP/DOWN CONVERTER AND POWER SUPPLY SYSTEM


    Additional title:

    昇降圧コンバータおよび電源システム


    Contributors:

    Publication date :

    2018-11-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / 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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