Rotor for asynchronous starting permanent magnet motor, and asynchronous starting permanent magnet motor

A permanent magnet motor, asynchronous starting technology, applied in synchronous machines, magnetic circuits, electromechanical devices, etc., can solve problems such as reducing motor efficiency, and achieve the effect of improving efficiency and increasing torque

Pending Publication Date: 2021-01-05
EMERSON CLIMATE TECH (SUZHOU) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the air-gap flux density waveform and electromotive force waveform of the current asynchronous star

Method used

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  • Rotor for asynchronous starting permanent magnet motor, and asynchronous starting permanent magnet motor
  • Rotor for asynchronous starting permanent magnet motor, and asynchronous starting permanent magnet motor
  • Rotor for asynchronous starting permanent magnet motor, and asynchronous starting permanent magnet motor

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Embodiment Construction

[0029] will now be combined with the Figures 1 to 10 Preferred embodiments of the present invention are described in detail. The following description is merely exemplary in nature and is not intended to limit the invention and its application or uses. In the various views, corresponding components or parts are provided with the same reference signs.

[0030] figure 1 A rotor 10 of a related art asynchronous start permanent magnet synchronous motor is shown. Such as figure 1 As shown, the rotor 10 of the asynchronous start permanent magnet synchronous motor mainly includes an iron core 50 , a squirrel cage 30 arranged on the outer periphery of the iron core 50 , and end rings 20 installed at both ends of the squirrel cage 30 . Iron core 50 can adopt laminated iron core, and its center is provided with the through hole 53 that is used for installing rotating shaft, and the outer periphery is provided with the groove that is used for installing the aluminum bar of squirrel ...

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PUM

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Abstract

The invention relates to a rotorfor asynchronous starting a permanent magnet motor, and an asynchronous starting permanent magnet motor. The rotor comprises a rotating shaft, an iron core and a squirrel cage, the rotating shaft penetrates through the center of the iron core, the squirrel cage is arranged on the periphery of the iron core, at least two poles of permanent magnets are embedded in theiron core, each pole permanent magnet is provided with at least two layers in the radial direction so as to at least comprise a first-layer permanent magnet and a second-layer permanent magnet, and the second-layer permanent magnet is arranged on the outer side, away from the center o of the rotating shaft, of the first-layer permanent magnet. In a cross section of the rotor, a total length L2 ofthe second layer of permanent magnets is in a range of 40% to 100% of a total length L1 of the first layer of permanent magnets. The waveform of the air gap flux density of the asynchronous startingpermanent magnet motor comprising the rotor is closer to the ideal sine wave efficiency, and the efficiency and the performance of the motor are improved.

Description

technical field [0001] The invention relates to the field of asynchronous starting permanent magnet motors, and more particularly relates to a rotor with double-layer permanent magnets of an asynchronous starting permanent magnet motor. Background technique [0002] This section provides background information related to the present disclosure which does not necessarily constitute prior art. [0003] Asynchronous starter permanent magnet motor is a kind of permanent magnet motor with self-starting ability, which has the characteristics of both induction motor and permanent magnet synchronous motor. The motor starts by relying on the asynchronous torque generated by the interaction between the rotating magnetic field of the stator and the cage-type rotor. During steady-state operation, the rotor rotates at a synchronous speed, the cage-type rotor no longer functions, and there is no rotor resistance loss. Compared with the variable speed permanent magnet motor, there are squ...

Claims

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Application Information

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IPC IPC(8): H02K1/22H02K1/27H02K21/46
CPCH02K1/223H02K1/27H02K21/46H02K2213/03
Inventor 李鑫吕莹
Owner EMERSON CLIMATE TECH (SUZHOU) CO LTD
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