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    • 2. 发明授权
    • System and method for current estimation for operation of electric motors
    • 电动机运行的电流估计系统及方法
    • US08786244B2
    • 2014-07-22
    • US13241103
    • 2011-09-22
    • Jihoon Jang
    • Jihoon Jang
    • H02P8/36
    • H02P23/14H02P21/22Y02T10/7258
    • Methodologies and systems are provided for current estimation in electric motor. The system comprises an electric motor having sensors for sensing at least motor current, motor temperature and motor speed. A vehicle controller is coupled to the sensors and includes a closed-loop current control system for the electric motor having a current compensation circuit for providing a current compensation signal that is used to adjust a current command for the electric motor. The current compensation circuit includes a short-circuit current calculator for providing a short-circuit current value based upon the motor temperature and the motor speed, a compensation gain calculator for providing a gain compensation value based upon the motor speed, and circuitry for combining the motor current, the short-circuit current value and the gain compensation value to provide the current compensation signal. Methods for current estimation in electric motor are also provided.
    • 提供了电动机当前估计的方法和系统。 该系统包括具有用于至少感测电动机电流,电动机温度和电动机速度的传感器的电动机。 车辆控制器耦合到传感器,并且包括用于电动机的闭环电流控制系统,其具有电流补偿电路,用于提供用于调整用于电动机的电流指令的电流补偿信号。 电流补偿电路包括:短路电流计算器,用于基于电机温度和电机速度提供短路电流值;补偿增益计算器,用于基于电机速度提供增益补偿值;以及电路,用于将 电机电流,短路电流值和增益补偿值,以提供电流补偿信号。 还提供了电动机电流估计方法。