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A permanent magnet motor magnetic field calculation method adopting a non-uniform segmented Halbach array

A technology of permanent magnet motors and arrays, which is applied in computing, electrical digital data processing, and special data processing applications, etc., and can solve problems such as not easy to be affected, long computing time, etc.

Active Publication Date: 2019-06-28
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology

The finite element method consumes a long calculation time, and it is not easy to study the influence of the motor structural parameters on the motor magnetic field
The calculation accuracy of the equivalent magnetic circuit method depends on the number of meshes, but the more the number of meshes, the longer the calculation time. Therefore, the calculation accuracy of this method is inversely proportional to the calculation time, which has its own limitations. sex

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  • A permanent magnet motor magnetic field calculation method adopting a non-uniform segmented Halbach array
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  • A permanent magnet motor magnetic field calculation method adopting a non-uniform segmented Halbach array

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Embodiment Construction

[0035] The present invention will be described below in conjunction with the accompanying drawings and embodiments.

[0036]The first step: determine the solution area;

[0037] Depend on figure 1 It can be seen that the solution area is divided into three areas, area Ι and area ΙΙ are air domains, if the motor is an inner rotor, area Ι is the effective air gap area, and area ΙΙ is adjusted according to the material properties of the rotor core, when R i =R mi , the rotor core is composed of ferromagnetic material, when R i → When 0, the rotor core is composed of non-ferromagnetic materials. If the motor is an external rotor, the area ΙΙΙ is the effective air gap area, and the area Ι is adjusted according to the material properties of the rotor core. When R o =R mo , the rotor core is composed of ferromagnetic material, when R o When →∞, the rotor core is composed of non-ferromagnetic materials; the region ΙΙ is the segmented Halbach array permanent magnet region.

[003...

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Abstract

The invention relates to a permanent magnet motor magnetic field calculation method adopting a non-uniform segmented Halbach permanent magnet array. The method comprises the following steps: determining a solution area; respectively establishing a Laplace equation or a Poisson equation for different solution regions; calculating the radial and tangential component amplitudes of the permanent magnet under each harmonic wave of the residual magnetization by considering the non-uniform segmentation of the magnetic block under each pole in the segmented Halbach permanent magnet array and the gap between the magnetic blocks; and solving the established Laplace equation and Poisson equation to obtain an expression of a scalar magnetic potential in a solving region, thereby obtaining a radial component and a tangential component of the magnetic density of each region. The method can be used for accurately calculating the magnetic field of the internal and external rotor sectional Halbach array permanent magnet motor with any number of pole pairs, any number of magnetic blocks per pole and non-uniform sections of the magnetic blocks under each pole, and can be used for researching the coupling influence of the non-uniform sections of the magnetic blocks under each pole and the gaps between the magnetic blocks on the magnetic field of the motor.

Description

technical field [0001] The invention relates to a permanent magnet motor using a non-uniform segmented Halbach array and a magnetic field analytical calculation method thereof. Background technique [0002] The Halbach permanent magnet array generally has two forms, the full-ring Halbach permanent magnet array and the segmented Halbach permanent magnet array. The full-ring Halbach permanent magnet array can generate a pure sinusoidal air-gap magnetic field, but it is difficult to process the full-ring Halbach permanent magnet array. The blocks are combined and arranged in a specific order to obtain the required Halbach permanent magnet array. The width of each segment of the permanent magnet in the segmented Halbach permanent magnet array will definitely affect the distribution waveform of the air gap magnetic field, and then affect the back electromotive force and electromagnetic torque of the motor. Therefore, it is of great significance to apply the non-uniform segmented...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCY02T10/64
Inventor 郭丽艳王慧敏谷鑫
Owner TIANJIN POLYTECHNIC UNIV
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