Switched reluctance motor linkage non-linear modeling method

Abstract

The invention discloses a switched reluctance motor linkage non-linear modeling method and belongs to the switched reluctance motor linkage modeling technology field. According to the method, fitting of the linkage data of a switched reluctance motor at several special positions is carried out through a least squares to acquire a fitting coefficient matrix A, fitting of linkage and positions is accomplished, and a relationship between linkage and currents is converted into a relationship between the fitting coefficient matrix A and the currents; through analyzing the relationship between linkage and the currents, a relationship between elements and the currents of the five-order polynomial fitting coefficient matrix A is employed, an error correction coefficient rp is introduced into a position interval between a smallest induction position and a largest induction position to correct errors of all the currents, and a switched reluctance motor linkage non-linear model is established. Through the method, accuracy of the linkage model is improved, and a good engineering application value is realized.

Description

technical field [0001] The invention relates to a nonlinear modeling method of flux linkage of a switched reluctance motor, which is especially suitable for switched reluctance motors with various phase numbers and structures. Background technique [0002] The switched reluctance motor has the advantages of simple structure, durable, reliable operation, and high energy conversion efficiency. model is more difficult. At present, there are many nonlinear modeling methods, including interpolation iteration method, function fitting method, fast simulation method, equivalent magnetic circuit method and intelligent method. The division of the equivalent magnetic circuit in the equivalent magnetic circuit method is difficult and the accuracy of the reluctance calculation depends on assumptions and estimates, the calculation speed is fast, but the accuracy is not high; the same as the equivalent magnetic circuit method, the fast simulation method has a fast calculation speed, But ...

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Problems solved by technology

The division of the equivalent magnetic circuit in the equivalent magnetic circuit method is difficult and the accuracy of the reluctance calculation depends on assumptions and estimates, the calculation speed is fast, but the accuracy is not high; the same as the equivalent magnetic circuit method, the fast simulation method has a fast calculation speed, But the accuracy is not high; the interpolation iterative method and the intelligent method require more flux linkage data, and the scope of application is not large; the function fitting method is to fit the motor on the basis of the magnetization curve of the switched reluctance motor obtained through electromagnetic numerical calculation or experiment Nonlinear flux linkage characteristics

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