永磁同步电机三矢量模型预测电流控制  

Three-Vector-Based Model Predictive Current Control for Permanent Magnet Synchronous Motor

作　　者：徐艳平[1] 王极兵 张保程 周钦[1] 

机构地区：[1]西安理工大学电气工程系,西安710048

出　　处：《电工技术学报》2018年第5期980-988,共9页Transactions of China Electrotechnical Society

摘　　要：永磁同步电机最优占空比模型预测电流控制策略中电压矢量方向固定,可选矢量范围具有一定局限性,且仅对交轴电流实现了无差拍控制,因而电流仍有较大的脉动。该文提出了一种三矢量模型预测电流控制策略,在每个扇区用三个基本电压矢量等效地合成一个期望电压矢量,并将6个扇区中合成的6个期望电压矢量作为备选电压矢量,从而其范围能够覆盖任意方向、任意幅值。采用直交轴电流无差拍方法计算矢量作用时间,对直交轴电流同时实现了无差拍控制,有效地减小了电流脉动,提高了系统稳态性能。实验结果证明了所提出方法的可行性和有效性。In the optimal duty cycle model predictive control strategy of permanent magnet synchronous motor, the voltage vector direction is fixed and the range of optional vectors are limited, and only the quadrature component of current is controlled by using a deadbeat solution, so the current still has large ripples. In this paper, a three-vector-based model predictive current control strategy is proposed. In this method, three basic voltage vectors are equivalent to synthesize a expected voltage vector in each sector, and six expected voltage vectors in six sectors are used as candidate voltage vectors, which can cover any direction and any amplitude. In order to achieve the deadbeat control of the direct and quadrature current components simultaneously, the deadbeat principle is used to calculate the vector duration in this paper. The strategy can reduce the current ripples effectively, and improve the steady-state performance. Experimental results demonstrate the feasibility and effectiveness of the proposed strategy.

关 键 词：永磁同步电机 三矢量 模型预测电流控制 期望电压矢量 电流脉动 

分 类 号：TM351[电气工程—电机]