The invention discloses an improved model prediction control method for an electrically-driven reconfiguration type vehicle-mounted charging system, and the method comprises the steps: obtaining a reference value of the current amplitude of an x-y plane through the constant-voltage and constant-current control of a battery; secondly, collecting a power grid voltage phase; then, an x-y plane current reference value is obtained through a reference current calculation formula, and other sub-plane current reference values are determined; then, six-phase current of the symmetric six-phase permanent magnet synchronous motor is collected, and sub-plane current is obtained through calculation according to the decoupling matrix; then, calculating a predicted current value at the next moment according to the prediction model; thirdly, selecting a voltage vector of the next period according to the value function; and finally, a driving signal of a six-phase inverter is generated according to the voltage vector, and charging control of the six-phase electrically-driven reconfiguration type vehicle-mounted charging system is realized. According to the method, the dynamic performance and the steady-state performance of the system can be improved while normal charging of the system is guaranteed, the calculation burden of the system is relieved, and torque pulsation caused by traditional three-phase charging control is greatly reduced.

    本发明公开了一种电驱重构型车载充电系统改进型模型预测控制方法,首先,通过电池恒压恒流控制得到x‑y平面电流幅值的参考值;其次,采集电网电压相位;然后,由参考电流计算公式得到x‑y平面电流参考值,并确定其余子平面电流参考值;接着,采集对称六相永磁同步电机的六相电流并根据解耦矩阵计算得到子平面电流;随后,根据预测模型计算下一时刻的预测电流值;再次,根据价值函数选择下一周期的电压矢量;最后,根据电压矢量生成六相逆变器的驱动信号,实现六相电驱重构型车载充电系统的充电控制。本发明能够在保证系统实现正常充电的同时,提升其动态性能与稳态性能,减轻系统计算负担,大幅降低传统三相充电控制引起的转矩脉动。


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    Title :

    Improved model prediction control method for electrically-driven reconfiguration type vehicle-mounted charging system


    Additional title:

    一种电驱重构型车载充电系统改进型模型预测控制方法


    Contributors:
    YU FENG (author) / LIU AIHUA (author) / ZHANG JIN (author) / YIN QIHAO (author)

    Publication date :

    2024-08-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

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