PROBLEM TO BE SOLVED: To provide a power conversion device capable of accurately detecting a failure symptom of a semiconductor switching element in a power conversion device mounted to a vehicle, and further to provide a failure symptom detection method.SOLUTION: A power conversion device is mounted to a vehicle and converts supplied DC or AC power into AC or DC power on the basis of switching control by a semiconductor switching element. The power conversion device comprises: an acquisition instruction section; a current value acquisition section; and a failure symptom detection section. The acquisition instruction section gives instruction of acquisition of a current value when determining a control state of a vehicle to be a specific operation state on the basis of control state information while acquiring the control state information indicating the control state of the vehicle. The current value acquisition section acquires a value of current flowing through the semiconductor switching element via a current sensor provided in a circuit having the semiconductor switching element when receiving the instruction of acquisition from the acquisition instruction section.

    【課題】車両に搭載される電力変換装置における半導体スイッチング素子の故障予兆を精度よく検出できる電力変換装置及び故障予兆検出方法を提供することである。【解決手段】実施形態の電力変換装置は、車両に搭載され、供給される直流または交流の電力を、半導体スイッチング素子によるスイッチング制御に基づいて交流または直流の電力に変換する。電力変換装置は、取得指示部と、電流値取得部と、故障予兆検出部と、を備える。取得指示部は、前記車両の制御状態を示す制御状態情報を取得するとともに、当該制御状態情報に基づいて特定の動作状態に至ったと判断した場合に、電流値の取得を指示する。電流値取得部は、前記取得指示部から前記取得の指示を受け付けたときに、前記半導体スイッチング素子を有する回路に設けられた電流センサを介して当該半導体スイッチング素子に流れる電流値を取得する。【選択図】図1


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    Title :

    POWER CONVERSION DEVICE AND FAILURE SYMPTOM DETECTION METHOD


    Additional title:

    電力変換装置及び故障予兆検出方法


    Contributors:

    Publication date :

    2015-08-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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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