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A permanent magnet synchronous motor rotor with gas circulation function

A permanent magnet synchronous motor and gas circulation technology, applied in the direction of magnetic circuit rotating parts, magnetic circuit, electromechanical devices, etc., to reduce temperature difference, speed up air circulation, and avoid loss of magnetism

Active Publication Date: 2019-05-21
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the problems encountered in the heat dissipation of the internal rotor of the permanent magnet synchronous traction motor, the present invention provides a structure that strengthens the gas circulation in the inner cavity of the permanent magnet synchronous motor

Method used

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  • A permanent magnet synchronous motor rotor with gas circulation function
  • A permanent magnet synchronous motor rotor with gas circulation function
  • A permanent magnet synchronous motor rotor with gas circulation function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A rotor of a permanent magnet synchronous motor with a gas circulation function. A helical blade 2 is arranged on a rotating shaft 1 of the rotor, and a rotor iron core and a permanent magnet are installed on the outer edge of the helical blade 2 .

[0016] The rotor includes a rotating shaft 1, a helical blade 2, an external spline disc 4, a rotor iron core and a permanent magnet sleeve 3. The inner edge of the helical blade 2 is fixed on the rotating shaft 1, and the rotating shaft 1 at both ends of the helical blade 2 are respectively The outer spline disc 4 is coaxially fixed, the two ends of the inner cavity of the rotor core and the permanent magnet sleeve 3 are provided with inner spline holes 6 matching the outer spline disc 4, and the outer spline disc 4 is Vent holes 5 are provided.

[0017] The matching relationship between the outer spline disc 4 and the inner spline hole 6 is the interference fit of the spline tooth top.

[0018] When the motor is working,...

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Abstract

The invention discloses a permanent magnet synchronous motor rotor with a gas circulating function. A spiral blade is arranged on a rotating shaft of the rotor; a rotor iron core and a permanent magnet are arranged at the outer edge of the spiral blade; the rotor comprises the rotating shaft, the spiral blade, external spline discs, the rotor iron core and a permanent magnet sleeve; the inner edge of the spiral blade is fixed on the rotating shaft; the external spline discs are coaxially fixed on the rotating shaft at two ends of the spiral blade; internal splines matched with the corresponding external spline discs are arranged on the rotor iron core and at two ends of an inner cavity of the permanent magnet sleeve; ventilation holes are formed in the external spline discs. According to the permanent magnet synchronous motor rotor disclosed by the invention, air circulation inside the motor can be accelerated, temperature differences among all parts of a whole permanent magnet synchronous motor are enabled to be reduced, magnetic loss of a permanent magnet caused by local overheat is avoided, and the aim of reducing the temperature of a motor rotor is indirectly achieved.

Description

technical field [0001] The invention relates to a rotor of a permanent magnet synchronous motor, in particular to a method of designing spiral blades and ventilation holes inside the original rotor to realize gas circulation in a closed space inside the permanent magnet synchronous motor and to realize heat transfer. Background technique [0002] The permanent magnet synchronous motor has high power factor and high efficiency, and gradually replaces the AC asynchronous motor in many occasions. At present, a few developed countries have begun to use permanent magnet synchronous traction motors as the power source for high-speed railways. In order to prevent water, dust, iron filings, etc. from corroding the permanent magnet inside the motor, the permanent magnet motor adopts a fully enclosed structure. Since the permanent magnet traction motor used in rail transit usually has a power of more than 500KW and generates a lot of heat, the permanent magnet material in the motor r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27H02K1/32
CPCH02K1/2706H02K1/32
Inventor 贺德强葛超刘旗扬刘斌邓建新
Owner GUANGXI UNIV
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