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Megawatt high-speed permanent magnet motor temperature rise calculation method

A technology of permanent magnet motor and calculation method, which is applied in calculation, computer aided design, design optimization/simulation, etc., can solve the problems that it is difficult to meet the actual needs, and can not take into account the calculation speed and accuracy at the same time, so as to avoid the effect of accuracy defects

Pending Publication Date: 2022-05-27
NANJING NORMAL UNIVERSITY
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the above methods can take into account the calculation speed and accuracy at the same time, and it is difficult to meet the actual needs

Method used

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  • Megawatt high-speed permanent magnet motor temperature rise calculation method
  • Megawatt high-speed permanent magnet motor temperature rise calculation method
  • Megawatt high-speed permanent magnet motor temperature rise calculation method

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Embodiment Construction

[0065] The following combined embodiments and accompanying drawings are proposed in detail a temperature rise calculation method suitable for megawatt-level high-speed permanent magnet motors proposed in the present invention. These include the following steps:

[0066] Step 1: Establish a physical model of the motor solution domain:

[0067] Taking a 1MW surface-mount high-speed permanent magnet motor as an example, the size parameters of the motor are shown in Table 1, the stator rotor structure is shown in Figure 2, and the stator core adopts a silicon steel sheet superimposed structure. The windings are double-layered and wrapped in insulating material embedded in the stator groove. The permanent magnet is a surface-mount structure, the material is NdFeB35EH, and the carbon fiber sheath is used to fix the permanent magnet with the permanent magnet interference.

[0068] Considering the symmetry of the motor structure in this example, one-twelfth of the motor structure domain is ...

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Abstract

The invention provides a megawatt high-speed permanent magnet motor temperature rise calculation method. The method comprises the following steps: firstly, establishing a motor solution domain physical model; dividing grids according to structural characteristics, setting boundary conditions, and calculating fluid field data by using a computational fluid mechanics method; and calculating thermal resistance of each component based on the average flow velocity, establishing a thermal network model, and finally solving temperature rise distribution of each component of the motor. According to the method, the respective advantages of the computational fluid mechanics method and the lumped parameter thermal network method are combined, the thermal resistance parameters of the thermal network model are calculated through accurate flow field data obtained through the computational fluid mechanics method, and the accuracy defect caused by the fact that empirical values are adopted in a complex flow field in a traditional thermal network method is avoided. And the temperature rise distribution of the megawatt high-speed permanent magnet motor can be accurately and quickly calculated.

Description

Technical field [0001] The present invention relates to the field of motor temperature field calculation, specifically a megawatt-level high-speed permanent magnet motor temperature rise calculation method, specifically relates to a megawatt-level high-speed permanent magnet motor temperature rise calculation method based on computational fluid dynamics method combined with thermal network method. Background [0002] High-speed permanent magnet motors have been more and more widely used in the industrial field due to their high speed, small size and large power density. MW-class high-speed permanent magnet motor output power is greater, power density is higher, compared with the same volume of high-speed permanent magnet motor, effectively improve the utilization rate of motor materials, reduce production costs, but also bring large losses, temperature rise and other issues, as well as due to small heat dissipation area and heat dissipation difficulties. The temperature rise of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/28
CPCG06F30/23G06F30/28G06F2119/08Y02T90/00
Inventor 丁树业瞿腾超金子辰李光志申淑锋
Owner NANJING NORMAL UNIVERSITY
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