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Disk type electric motor rotor

A disc motor and rotor technology, applied in the direction of magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc., can solve the problems of permanent magnet demagnetization, rotor heating, affecting the amount of permanent magnets in the air gap of the motor, etc.

Inactive Publication Date: 2009-02-18
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, it was generally used to inlay permanent magnets in the rotor, and then use a large pressure plate to press the permanent magnets as a whole. However, the disadvantage of this structure is that the eddy current loss in the pressure plate is too large, which will cause the rotor to heat up and the permanent magnets to demagnetize. There is a certain risk; and the pressure plate The thickness increases the air gap of the motor, which affects the air gap flux density of the motor and the amount of permanent magnets

Method used

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  • Disk type electric motor rotor
  • Disk type electric motor rotor
  • Disk type electric motor rotor

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Embodiment Construction

[0012] Further describe content of the present invention below in conjunction with accompanying drawing and embodiment:

[0013] The rotor bracket 3 of the motor is made of stainless steel, and the structure of the rotor bracket is as follows figure 2 As shown, the rotor bracket 3 is divided into at least two slots, which are evenly distributed along the circumference of the rotor, and permanent magnets are embedded in the slots. Restricted by processing conditions, permanent magnets are generally divided into two or more pieces. In this example, the permanent magnet is divided into two pieces: the first permanent magnet 1 and the second permanent magnet 2, and its specific structure is as follows image 3 and Figure 5 shown. The first permanent magnet 1 and the second permanent magnet 2 are assembled in the groove of the rotor bracket, and the pressing plate 5 and the screw 4 are partially fixed on both sides of the first permanent magnet 1 and the second permanent magne...

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Abstract

A disc type motor rotor, belonging to motor technology field, includes a rotor spider, permanent magnets and a press platen. The rotor spider is divided into at least two grooves, which are distributed uniformly along the rotor circumference; the permanent magnet under each magnetic pole is divided into at least two blocks, the permanent magnet under each magnetic pole is arranged in each groove of the motor rotor spider separately, and the press platen and a screw nail are locally fixed in the two sides along the radial direction of each permanent magnet. The advantage of the motor with the structure is that eddy flow attrition of the rotor being decreased, the reliability of the motor being increased, the magnetic leakage of the motor being reduced, the power density of the motor being improved, and the air gap magnetic dense of the motor being enlarged, therefore the permanent magnet is used full.

Description

technical field [0001] The invention belongs to the technical field of motors, and relates to a rotor of a disc motor. Background technique [0002] As a permanent magnet synchronous motor with special structure, the disc permanent magnet synchronous motor combines the characteristics of permanent magnet motor and axial magnetic field motor. It has the advantages of short axial size, compact structure, high power density and small moment of inertia. In the past, it was generally used to inlay permanent magnets in the rotor, and then use a large pressure plate to press the permanent magnets as a whole. However, the disadvantage of this structure is that the eddy current loss in the pressure plate is too large, which will cause the rotor to heat up and the permanent magnets to demagnetize. There is a certain risk; and the pressure plate The thickness increases the air gap of the motor, which affects the air gap magnetic density of the motor and the amount of permanent magnets....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27
Inventor 唐任远周挺马鑫
Owner SHENYANG POLYTECHNIC UNIV
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