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Permanent magnet synchronous motor

A permanent magnet synchronous motor and permanent magnet technology, applied in the field of electric motors, can solve problems such as high operating temperature, fast temperature rise of permanent magnet synchronous motors, and easy demagnetization of magnetic steel, so as to increase the air intake area, good ventilation and heat dissipation conditions, and eliminate The effect of axial tension

Inactive Publication Date: 2012-10-10
SHANXI NORTH MACHINE BUILDING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art, in order to solve the problems that the permanent magnet synchronous motor has fast temperature rise, high operating temperature, and easy demagnetization of the magnet steel, and proposes a new permanent magnet synchronous motor structure, which further has self- start function

Method used

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Embodiment 1

[0084] In order to improve the versatility of parts and shorten the development period and cost, the series of motors in the present invention use the stator punching plates of the Y series three-phase induction motor. The capacity is 280KW, 6KV, 6P, Y400-6 stator punching, outer diameter φ670, inner diameter φ465, iron core length L=440mm, 6 radial air passages, maximum air gap 9mm, minimum air gap 6mm, full load efficiency 94.8% , the power factor is 0.96, and the temperature rise is 71K.

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Abstract

The present invention provides a permanent magnet synchronous motor, belonging to the technical field of motors. The permanent magnet synchronous motor is characterized by: adoption of a solid shuttle-shaped rotor structure; a large radial air gap and an axial non-constant air gap; a permanent magnet adopting a radial buried structure; a starting squirrel cage embedded on the rotor; and the rotor and a stator both provided with corresponding ventilation ducts that facilitate cooling air which passes through the large radial air gap to take away heat of the surface of the solid rotor and heat of the stator itself. The permanent magnet synchronous motor in the invention not only solves a problem of starting difficulty in a permanent magnet motor having a conventional laminated rotor, but also solves a problem of heat dissipation difficulty in a permanent magnet motor having a conventional solid rotor. The permanent magnet synchronous motor in the invention with a starting torque from 2.0 to 3.0 further overcomes a problem of easy demagnetization of the permanent magnet caused by a too high temperature of the rotor.

Description

technical field [0001] The invention relates to a synchronous motor excited by permanent magnet materials, which belongs to the technical field of electric motors. Background technique [0002] At present, the consensus in the motor industry is that three-phase AC permanent magnet synchronous motors are superior to Y-series asynchronous motors because of their high efficiency, flat efficiency curve, and high power factor. They are the main direction for the future development of the motor industry. Moreover, the development direction of high-efficiency and energy-saving motors is also in line with the country's energy-saving and emission-reduction policies, and has also been vigorously promoted by the country. However, there are many problems in the three-phase AC permanent magnet synchronous motor. For example: the laminated magnetic pole rotor has the problem of insufficient starting torque; and the three-phase AC permanent magnet synchronous motor using frequency convers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/14H02K1/27H02K1/28H02K1/32H02K1/20H02K5/20
Inventor 邢明喜王志林安江龙漆复兴郜戍琴许鹏李有生孙莉王跃军崔志刚
Owner SHANXI NORTH MACHINE BUILDING
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