基于电池功率的永磁同步电机预测电流控制

Predictive current control of permanent magnet synchronous motor based on battery power

纯电动汽车动力电池的荷电状态下降到一定程度时,会出现电池实际输出功率无法满足控制需求的情况。考虑电池功率对电机控制的影响,建立基于电池输出功率的永磁同步电机预测电流控制策略。使用无差拍预测控制预测电流值,进而计算电机期望功率。当电机期望功率超出电池功率时,通过降低目标转速和对控制电流限幅的方式降低期望功率值。通过仿真及实验验证,提出的控制策略能够在电池输出功率下降的情况下,降低电机期望功率,使电机能继续正常运转。并且与传统控制策略相比,电机动态响应速度更快,响应时间缩短50%以上,功率波动更小,动态性能明显提升。结果表明,基于电池输出功率的永磁同步电机电流预测控制策略是有效的。

When the state of charge of the pure electric vehicle power battery drops to a certain level,the actual output power of the battery cannot meet the control requirements.Considering the influence of battery power on motor control,a predictive current control strategy for permanent magnet synchronous motor(PMSM)based on battery output power is established.Use deadbeat predictive control to predict the current value and then calculate the desired motor power.When the desired power of the motor exceeds the battery power,the desired power value is reduced by reducing the target speed and limiting the control current.Through simulation and experimental verification,the control strategy proposed in this paper can reduce the expected power of the motor when the output power of the battery decreases,so that the motor can continue to operate normally.And compared with the traditional control strategy,the dynamic response speed of the motor is faster,the response time is shortened by more than 50%,the power fluctuation is smaller,and the dynamic performance is significantly improved.The results show that the current predictive control strategy of PMSM based on battery output power is effective.