PROBLEM TO BE SOLVED: To provide a technique for restricting limit on load factor of an inverter.SOLUTION: If a heating temperature of a power card of s second converter cooled by an upstream cooling unit increases higher than a cooling unit that cools an inverter and a first inverter, warmed cooling liquid is measured downstream of it by a temperature sensor, and the temperature exceeds a predetermine threshold value Tth (S3: YES), a power controller decreases power supplied to the second converter and also increases power supplied to the first converter (S5). Thus, while the heating temperature of the power card of the second converter decreases, a power decrease of the second converter is compensated for by the power increase of the first converter. As a result of it, the temperature of cooling water flowing in the upstream cooling unit decreases and the temperature of cooling liquid flowing into the downstream cooling unit also decreases. Accordingly, cooling deficiency of inverter is solved and limit on load factor of the inverter is restricted.SELECTED DRAWING: Figure 4

    【課題】インバータの負荷率制限の発生を抑制する技術を提供する。【解決手段】インバータ及び第1コンバータを冷却する冷却ユニットよりも、上流の冷却ユニットにより冷却される第2コンバータのパワーカードの発熱温度が上昇し、暖められた冷却液がその下流において温度センサに計測され、その温度が所定の閾値Tthを超えた場合には(S3;YES)、パワーコントローラは、第2コンバータへの供給電力を減少させるとともに第1コンバータへの供給電力を増加させる(S5)。これにより、第2コンバータのパワーカードの発熱温度が下がる一方で、第2コンバータの電力低下分が第1コンバータの電力増加分により補われ、上流の冷却ユニットを流れる冷却液の温度もそれに伴い低下し下流の冷却ユニットに流れ込む冷却液の温度も低下する。インバータの冷却不足が解消され得るため、インバータの負荷率制限の発生が抑制される。【選択図】図4


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    Title :

    VEHICLE WITH MOTOR FOR RUNNING


    Additional title:

    走行用のモータを備える自動車


    Contributors:

    Publication date :

    2017-06-08


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



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