Magnetization curve and fitting method and use of switched reluctance motor based on hyperbolic tangent function

CN116992811BActive Publication Date: 2026-11-03XIANGTAN UNIV +2
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Patent Information

Application Number
CN202310987014.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-08-07
Publication Date
2026-11-03
Estimated Expiration
2043-08-07

AI Technical Summary

Technical Problem

Existing methods for fitting magnetization curves of switched reluctance motors suffer from problems such as large fitting errors, difficulty in determining fitting coefficients, and fitting curves that do not closely match actual operating conditions, which affect the accuracy of torque pulsation and sensorless control.

Method used

By employing a magnetization curve based on the hyperbolic tangent function and introducing amplitude adjustment factors, width adjustment factors, smoothness adjustment factors, and an accuracy term, the amplitude, width, and smoothness of the fitted magnetization curve can be adjusted according to the real-time rotor position, thereby improving the fitting degree and accuracy.

Benefits of technology

It achieves high-precision magnetization curve fitting with small error and a beautiful curve that closely matches the actual operating conditions. It is suitable for switched reluctance motors with various phase numbers and structures, and improves the accuracy of torque ripple and sensorless control.

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Abstract

The application discloses a magnetization curve of a switched reluctance motor based on a hyperbolic tangent function and a fitting method and use thereof, the fitting obtained magnetization curve contains an amplitude adjustment factor, a width adjustment factor and a smoothness adjustment factor, and the amplitude, the width and the smoothness of the fitting curve can be adjusted according to a real-time rotor position during fitting; the fitting obtained magnetization curve also contains an accurate term, the magnetization curve generated by the hyperbolic tangent function is very close to a measured magnetization curve, and has higher fitting degree and accuracy. The method proposes a hyperbolic tangent function fitting switched reluctance motor magnetization curve, can reduce all errors caused by current, establish high fitting degree, small error, and the switched reluctance motor magnetization curve is accurately fitted, and has good engineering application value.
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