基于矢量作用时间的永磁同步电机预测电流控制
发布时间：2019-07-09 06:53
【摘要】：针对以电压源逆变器(VSI)馈电的永磁同步电机(PMSM)驱动系统,提出一种基于矢量作用时间的预测电流控制策略。从拓展有限控制集和改变最优电压矢量选择方式的角度出发来改善系统的稳态性能。首先通过加入虚拟电压矢量的方式拓展有限控制集,并依据在每个扇区内各矢量对d轴电流增、减作用的不同来优化有限控制集。其次令下一时刻的预测电流值等于其期望值,从而可获得每个矢量作用时到达d、q轴电流期望值的矢量作用时间。利用各矢量的作用时间来衡量其对d、q轴电流的作用效果,以此代替传统预测电流控制中的电流预测环节。并依靠矢量作用时间来选择最优电压矢量,这样可以有效解决占空比调制环节难以有效发挥作用的问题。最后通过实验对所提算法的可行性与有效性进行了验证。
文内图片：
图片说明：不同电压矢量作用下的预测电流轨迹Fig.1Predictivecurrenttrajectoriesunderdifferentvoltagevectors
[Abstract]:A predictive current control strategy based on vector action time is proposed for (PMSM) drive system of permanent magnet synchronous motor (PMSM) fed by voltage source inverter (VSI). The steady-state performance of the system is improved from the point of view of expanding the finite control set and changing the optimal voltage vector selection mode. Firstly, the finite control set is extended by adding virtual voltage vector, and the finite control set is optimized according to the difference of d axis current increase and subtraction effect of each vector in each sector. Secondly, the predicted current value at the next time is equal to its expected value, so that the vector action time to reach the expected value of d and Q axis current can be obtained when each vector acts on it. The action time of each vector is used to measure the effect of each vector on d, Q axis current, which replaces the current prediction link in traditional predictive current control. The optimal voltage vector is selected by vector action time, which can effectively solve the problem that duty cycle modulation is difficult to play an effective role. Finally, the feasibility and effectiveness of the proposed algorithm are verified by experiments.
【作者单位】： 天津大学电气自动化与信息工程学院;天津市电机系统先进设计与智能控制技术工程中心;
【基金】：国家自然科学基金项目资助(51577134,51377121)
【分类号】：TM341
，
本文编号：2511948
文内图片：
图片说明：不同电压矢量作用下的预测电流轨迹Fig.1Predictivecurrenttrajectoriesunderdifferentvoltagevectors
[Abstract]:A predictive current control strategy based on vector action time is proposed for (PMSM) drive system of permanent magnet synchronous motor (PMSM) fed by voltage source inverter (VSI). The steady-state performance of the system is improved from the point of view of expanding the finite control set and changing the optimal voltage vector selection mode. Firstly, the finite control set is extended by adding virtual voltage vector, and the finite control set is optimized according to the difference of d axis current increase and subtraction effect of each vector in each sector. Secondly, the predicted current value at the next time is equal to its expected value, so that the vector action time to reach the expected value of d and Q axis current can be obtained when each vector acts on it. The action time of each vector is used to measure the effect of each vector on d, Q axis current, which replaces the current prediction link in traditional predictive current control. The optimal voltage vector is selected by vector action time, which can effectively solve the problem that duty cycle modulation is difficult to play an effective role. Finally, the feasibility and effectiveness of the proposed algorithm are verified by experiments.
【作者单位】： 天津大学电气自动化与信息工程学院;天津市电机系统先进设计与智能控制技术工程中心;
【基金】：国家自然科学基金项目资助(51577134,51377121)
【分类号】：TM341
，
本文编号：2511948
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