A Calculation Method of Harmonic Electromotive Force of Rotor Teeth
A calculation method and rotor tooth technology, applied in design optimization/simulation, special data processing applications, etc., can solve problems such as long calculation time, large calculation amount, and large influence of tooth harmonic electromotive force magnetic circuit saturation, etc., and achieve fast calculation speed , small amount of calculation, fast and accurate calculation effect
Active Publication Date: 2022-03-18
NANCHANG UNIV
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Problems solved by technology
Electromagnetic field finite element method or field-circuit coupled time-step finite element method can be used to accurately calculate the electromotive force of rotor tooth harmonic windings, but these methods have the disadvantages of large amount of calculation and long calculation time
Using the traditional equivalent magnetic circuit method similar to the calculation of the fundamental winding electromotive force, the electromotive force can be quickly calculated by enlarging a certain fixed air gap length to consider the influence of magnetic circuit saturation, but the tooth harmonic electromotive force is greatly affected by the magnetic circuit saturation , and its saturation coefficient is non-monotonic, it is difficult to guarantee the accuracy of the calculation
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Embodiment Construction
[0017] The present invention will be further illustrated by the following specific examples.
[0018] The specific implementation of a rotor tooth harmonic electromotive force calculation method proposed by the present invention is as follows:
[0019] (1) Calculation of fundamental wave air gap flux density B δ1m
[0020] B δ1m =F fd1m lambda 0
[0021] In the formula: F fd1m is the magnitude of the fundamental excitation magnetomotive force, calculated according to the number of turns of the excitation winding and the excitation current, or the coercive force of the permanent magnet and the thickness of the magnetization direction; λ 0 Average air gap permeance per unit area.
[0022] (2) Determine the tooth harmonic saturation coefficient k t
[0023] According to the fundamental air gap flux density B δ1m , by finding the tooth harmonic saturation coefficient curve, such as figure 1 As shown, determine the tooth harmonic saturation coefficient k of the operating...
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A method for calculating the harmonic electromotive force of rotor teeth, comprising the steps of: determining the fundamental excitation magnetomotive force according to the number of turns of the excitation winding and a given excitation current or the coercive force of the permanent magnet and the thickness of the magnetization direction, and at the same time combining the magnetic field of the main magnetic circuit Calculate the fundamental air-gap magnetic density; determine the tooth harmonic saturation coefficient at this working point according to the relationship curve between the fundamental air-gap magnetic density and the tooth harmonic saturation coefficient; calculate the first-order tooth Harmonic permeance: According to the first-order tooth harmonic permeance and fundamental excitation magnetomotive force, the tooth harmonic flux density is calculated, and then the tooth harmonic flux and rotor tooth harmonic electromotive force are obtained. The method proposed by the invention has the advantages of clear concept, small amount of calculation, etc., and at the same time combines the characteristics of the non-monotonicity of the saturation coefficient of the tooth harmonic, and has high calculation accuracy.
Description
technical field [0001] The invention belongs to the technical field of motors, and relates to a method for calculating rotor tooth harmonic electromotive force. Background technique [0002] The hybrid excitation generator with tooth harmonic auxiliary excitation is a new type of permanent magnet synchronous generator (ZL201110118451.1). The adjustment of the air gap magnetic field of the permanent magnet generator can maintain the advantages of brushless, high efficiency and high power density of the permanent magnet generator at the same time. Accurate and fast calculation of the electromotive force of the rotor tooth harmonic winding is very important to grasp the performance of the motor. The electromagnetic field finite element method or field-circuit coupled time-step finite element method can be used to accurately calculate the electromotive force of rotor tooth harmonic windings, but these methods have the disadvantages of large amount of calculation and long calcula...
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IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 夏永洪温子健钟世桦张景明陈瑛
Owner NANCHANG UNIV