同步磁阻电机dq轴交叉耦合饱和电感模型参数寻优方法

同步磁阻电机的直轴电感Ld与交轴电感Lq随直轴电流id与交轴电流iq的非线性变化,极大地影响矢量控制特性。同步磁阻电机驱动器中用8个常数构建了电机dq轴交叉耦合饱和电感模型,为了推算其最优参数,在横向叠片各向异性转子同步磁阻电机的设计参数基础上,采用小电流常规方法测量Ld、Lq电感值,建立带权重的最小方均差模型,并针对不同目标函数设定相应的权重,采用改进和声搜索优化算法进行迭代,获得了与电机真实信息较为接近的优化解。其有效性通过电机对拖负载实验得以验证。

A Parameter Optimization Method for dq Axis Inductance Model of Synchronous Reluctance Motors Considering Cross-Coupling Magnetic Saturation

The performance of vector controlled system is greatly influenced by the non-linear changes of d axis inductanceLd and q axis inductanceLq of a synchronous reluctance motor according to different d axis and q axis current. The dq axis cross-coupling saturation inductor model was constructed with 8 constants in a synchronous reluctance motor driver. In order to find the optimal parameters, based on the design parameters of a transversally laminated anisotropic rotor synchronous reluctance motor, the measurement results ofLd &Lq were measured by general small current method, and a minimum average variance model was established. In addition, the weights were set up for different objective functions. An improved harmony search optimization algorithm was used, and thus the optimal solution was obtained, which was close to the real information of the motor. The method was proved in a load test.