Cage rotor magnetic gear magnetic field analysis and torque calculation method based on analytical method

A cage-type rotor and magnetic gear technology, applied in design optimization/simulation, geometric CAD, special data processing applications, etc., can solve problems such as the influence of calculation accuracy iteration accuracy, long calculation time, etc.

Pending Publication Date: 2021-02-19
CHINA THREE GORGES UNIV
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Problems solved by technology

The combination of analytical method and numerical method can accurately deal with various complex groove shapes, and the calculation speed is faster than the numerical m...

Method used

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  • Cage rotor magnetic gear magnetic field analysis and torque calculation method based on analytical method
  • Cage rotor magnetic gear magnetic field analysis and torque calculation method based on analytical method
  • Cage rotor magnetic gear magnetic field analysis and torque calculation method based on analytical method

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Embodiment Construction

[0078] Such as figure 1 As shown, a cage rotor magnetic gear magnetic field analysis and torque calculation method based on the analytical method includes the following steps:

[0079] Step 1: Establish a mathematical model of the vector magnetic potential in the air gap area and the permanent magnet area;

[0080] Step 2: Establish a mathematical model of the vector magnetic potential in the slotted and copper rod area;

[0081] Step 3: Calculate the cage rotor bar current;

[0082] Step 4: Calculate the output torque of the inner and outer rotors;

[0083] Step 5: Analyze and compare the analytical calculation results;

[0084] Described step one includes the following content:

[0085] The permanent magnet is radially magnetized. In the two-dimensional polar coordinate system, only the z-axis component is effective. The expression of the magnetic flux density generated by the permanent magnet is:

[0086]

[0087] in:

[0088] In the formula, θ is the angular dis...

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Abstract

The invention discloses a cage rotor magnetic gear magnetic field analysis and torque calculation method based on an analytical method. The method comprises the following steps: 1, establishing an airgap area and permanent magnet area vector magnetic potential mathematical model; 2, establishing a slotting and copper bar region vector magnetic potential mathematical model; 3, calculating the current of the cage type rotor rod; 4, calculating output torques of the inner rotor and the outer rotor; and 5, analyzing and comparing analysis calculation results. The invention provides a cage type rotor magnetic gear magnetic field analysis and torque calculation method based on an analytical method, and the method comprises the steps: dividing an analytical model into three sub-regions, i.e., apermanent magnet region, an air gap region and a cage type rotor rod region, according to the structural characteristics of a surface-mounted radial magnetizing magnetic gear model; respectively establishing a vector magnetic potential Laplace equation or Poisson equation of each region, connecting the subarea equations through boundary conditions, and solving an analytical expression of an air gap magnetic field and a cage rotor bar magnetic field by using a direct analytical method.

Description

technical field [0001] The invention relates to a method for analyzing the magnetic field of a cage rotor magnetic gear and calculating the torque based on an analytical method. Background technique [0002] Air-gap magnetic field analysis is the basis for magnetic gear design and performance calculations. The two-dimensional air-gap magnetic field of the surface-mounted cage rotor magnetic gear can be solved by numerical method or analytical method. The finite element method has strong adaptability and high calculation accuracy, but it takes a long time for modeling and calculation, which is not convenient in the optimal design of magnetic gears. The analytical method has a clear physical concept, and the analytical function can more intuitively reflect the relationship between each parameter and the magnetic field distribution. The parameter adjustment is convenient, the calculation amount is small, and the speed is fast, which is beneficial to the optimal design and stru...

Claims

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Application Information

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IPC IPC(8): G06F30/17G06F30/23
CPCG06F30/17G06F30/23
Inventor 井立兵王涛潘永林龚俊贲彤
Owner CHINA THREE GORGES UNIV
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