To provide a contactor deposition diagnostic device capable of suppressing erroneous determination of contactor deposition even when a motor rotates during diagnosis of the contactor deposition.SOLUTION: This contactor deposition diagnostic device comprises: a high-voltage battery 4 that is a main power source; an inverter 3 that receives power from the high-voltage battery 4 to drive a motor 2; a negative electrode side contactor 41 and a positive electrode side contactor 42 that cut electrical connection between the high-voltage battery 4 and the inverter 3; and a contactor disposition diagnostic unit 5 that switches disconnection of the negative electrode side contactor 41 and the positive electrode side contactor 42 at the time of activating a vehicle 1, diagnoses deposition of the negative electrode side contactor 41 and the positive electrode side contactor 42 on the basis of a change of a voltage applied to the inverter 3 at the time, and cuts off the negative electrode side contactor 41 and the positive electrode side contactor 42 when the rotational speed of the motor 2 is equal to or higher than a first rotational speed.SELECTED DRAWING: Figure 1

    【課題】コンタクタの溶着の診断中にモータが回転した場合でも、コンタクタの溶着の誤判定を抑えることができるコンタクタの溶着診断装置を提供すること。【解決手段】主電源である高電圧バッテリ4と、高電圧バッテリ4から電力を供給され、モータ2を駆動させるインバータ3と、高電圧バッテリ4とインバータ3との間の電気的接続を断接する負極側コンタクタ41及び正極側コンタクタ42と、車両1の起動時に、負極側コンタクタ41及び正極側コンタクタ42の断接を切り替え、そのときのインバータ3に印加される電圧の変化に基づいて負極側コンタクタ41及び正極側コンタクタ42の溶着を診断し、モータ2の回転速度が第1の回転速度以上の場合には、負極側コンタクタ41及び正極側コンタクタ42を切断させるコンタクタ溶着診断部5と、を備える。【選択図】図1


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    Title :

    CONTACTOR DEPOSITION DIAGNOSTIC DEVICE


    Additional title:

    コンタクタの溶着診断装置


    Contributors:

    Publication date :

    2023-01-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

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



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