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Asynchronous starting type permanent magnetic synchronizing motor of double-rotor structure

A permanent magnet synchronous and asynchronous starting technology, applied in the field of motors, can solve the problems of reducing the risk of permanent magnet demagnetization, increasing the inductance of the motor, and reducing the starting current of the motor, so as to reduce the risk of demagnetization, increase the inductance, and reduce the starting effect of current

Inactive Publication Date: 2015-05-13
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides an asynchronously started synchronous motor with a dual-rotor structure, the purpose of which is to effectively increase the inductance of the motor when the motor is started asynchronously, thereby reducing the starting current of the motor, This solves the technical problems of excessive motor winding temperature and reduces the risk of permanent magnet demagnetization

Method used

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  • Asynchronous starting type permanent magnetic synchronizing motor of double-rotor structure
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Embodiment 1

[0022] Embodiment 1 Radial air gap magnetic field asynchronous start permanent magnet synchronous motor

[0023] Fig. 1 shows the schematic diagram of a specific embodiment of the asynchronous start permanent magnet synchronous motor of double-rotor structure of the present invention, wherein Fig. 1 (a) is a transverse sectional view, and Fig. 1 (b) is a three-dimensional structural schematic diagram. The first embodiment is a radial air gap magnetic field motor topology. At this time, the first rotor core is the outer rotor core 3, the second rotor core is the inner rotor core 6, the stator is located in the middle of the inner and outer rotors, and the stator There are upper and lower layers of slots on the iron core 1, and the stator windings 2 are placed respectively. Among them, the placement positions of both sides of the stator winding 2 can be varied, such as placing in two radially upper and lower slots, tangentially adjacent two slots, or in two slots with a certain ...

Embodiment 2

[0026] Embodiment 2 Axial air gap magnetic field asynchronous start permanent magnet synchronous motor

[0027] figure 2 Shown is the schematic diagram of another specific embodiment of the asynchronous start permanent magnet synchronous motor of the double rotor structure of the present invention, wherein figure 2 It is a schematic diagram of a three-dimensional structure. This embodiment is an axial air gap magnetic field disk motor topology, such as figure 2 As shown, the stator is located between the inner and outer rotors, and the stator winding 2 is arranged on the stator core 1 . Wherein, the placement positions of the two sides of the stator winding 2 can be changed in many ways, such as crossing two slots tangentially or crossing two slots axially, the figure shown is only one of them.

[0028] A starting winding 5 is embedded on the outer surface of the inner rotor iron core 6 , and a permanent magnet 4 is pasted on the inner surface of the outer rotor iron core 3...

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Abstract

The invention discloses an asynchronous starting type permanent magnetic synchronizing motor of a double-rotor structure. The permanent magnetic synchronizing stepping motor comprises a stator, a first rotor and a second rotor; the stator is arranged between the first rotor and the second rotor; the stator comprises a stator iron core and a stator winding; the first rotor comprises a first rotor iron core and a permanent magnet; the second rotor comprises a second rotor iron core and a starting winding; or the first rotor comprises a starting winding and a first rotor iron core, and the second rotor comprises a second rotor iron core and a permanent magnet, and therefore, the permanent is separated from the starting winding. According to the asynchronous starting type permanent magnetic synchronizing motor of the double-rotor structure, a magnetic field generated in an air gap by the motor under starting rotates at the synchronous rotating speed and then induction current is generated in the starting winding, thus permanent magnet is not included in the rotor, and as a result, the magnetic conductance in a magnetic circuit of the main magnetic field is relatively high, the exciter inductance is improved, the stator current is reduced while starting the motor, the temperature of the motor winding is reduced, and the risk of demagnetizing of the permanent magnet can be reduced.

Description

technical field [0001] The invention belongs to the field of motors, and more specifically relates to an asynchronous start permanent magnet synchronous motor with a double-rotor structure. Background technique [0002] As a kind of permanent magnet synchronous motor, asynchronous start permanent magnet synchronous motor has its unique advantages. It combines the structural characteristics of induction motors and permanent magnet motors, has the advantages of high efficiency, high power factor, high starting quality factor, high power density, etc., and has a tendency to replace asynchronous motors in small and medium power applications. [0003] The traditional asynchronous start permanent magnet synchronous motor mostly has a single rotor structure, and the rotor has both a start winding and a permanent magnet. The permanent magnet is located inside the rotor, and there is a pole shoe made of ferromagnetic material between its outer surface and the outer circle of the rot...

Claims

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Application Information

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IPC IPC(8): H02K16/02
Inventor 曲荣海吴磊磊王亚玮李大伟
Owner HUAZHONG UNIV OF SCI & TECH
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