The invention discloses a motor counter electromotive force sampling module, which comprises: a motor driving unit for outputting PWM to a driving circuit according to a control duty ratio, wherein the driving circuit outputs a preset waveform motor driving voltage, stops outputting PWM after receiving a counter electromotive force sampling interrupt signal and continues for Tbreak duration, and outputs PWM to recover the preset waveform motor driving voltage after the Tbreak duration is finished; a motor control unit for calculating the required control duty ratio according to a target rotating speed and the actual rotating speed calculated by counter electromotive force, transmitting the duty ratio to the motor driving unit, and generating a counter electromotive force sampling interruptsignal to the motor driving unit and a sampling interrupt unit at an interval (Twork + Tbreak); and the sampling interrupt unit for performing motor end voltage sampling after timing Twait duration.The invention also discloses a motor counter electromotive force sampling method. According to the invention, the motor counter electromotive force sampling is not limited by the counter electromotiveforce sampling frequency and the duty ratio any more, and more space is provided for solving the NVH problem of a vehicle body stabilizing system.

    本发明公开了一种电机反电势采样模块包括:电机驱动单元根据控制占空比输出PWM至驱动电路,驱动电路输出预设波形电机驱动电压,收到反电势采样中断信号停止输出PWM并持续Tbreak时长,Tbreak时长结束后输出PWM恢复预设波形电机驱动电压;电机控制单元根据目标转速和反电势计算的实际转速计算所需的控制占空比,将占空比输送至于电机驱动单元,每间隔(Twork+Tbreak)产生反电势采样中断信号至电机驱动单元和中断采样单元;中断采样单元计时Twait时长后进行电机端电压采样。本发明还公开了一种电机反电势采样方法。本发明使电机反电势采样不再受反电势采样频率限制和占空比限制,给车身稳定系统NVH问题的解决提供了更多空间。


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    Title :

    Motor counter electromotive force sampling module and sampling method


    Additional title:

    电机反电势采样模块及采样方法


    Contributors:
    LI YUNSHENG (author) / DENG HAIYAN (author) / CHEN JINGJIE (author) / TIAN FENG (author)

    Publication date :

    2020-08-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen




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