Highly efficient high-speed permanent magnetic synchronous motor

A permanent magnet synchronous motor, high-efficiency technology, used in synchronous motors with static armatures and rotating magnets, etc., can solve the problems of large high-frequency loss of the stator and rotor of the motor, large harmonic components of winding current, and small leakage reactance. , to achieve the effect of reducing high-order harmonic magnetic flux, reducing wind friction loss, and reducing additional loss

Active Publication Date: 2009-11-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of the existing high-speed permanent magnet synchronous motors such as small leakage reactance, large winding current harmonic c

Method used

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  • Highly efficient high-speed permanent magnetic synchronous motor
  • Highly efficient high-speed permanent magnetic synchronous motor
  • Highly efficient high-speed permanent magnetic synchronous motor

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Experimental program
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specific Embodiment approach 1

[0011] Specific embodiment one: A kind of high-efficiency high-speed permanent magnet synchronous motor described in this embodiment has an inner rotor structure, which includes a stator, a rotor and an air gap. The rotor is composed of a permanent magnet 21, a permanent magnet sheath 23 and a rotating shaft 22. The stator Including the stator core and winding 4, the stator core 1 is cylindrical, and on the side close to the inner wall of the stator core 1, there are a plurality of cogged through holes 10 along the axial direction, the bottom of the cogged through holes 10 and the stator core 1 The minimum radial thickness of the inner wall is less than 2 mm, and the armature winding 4 is embedded in the alveolar through hole 10 near the axis side, and the armature winding 4 is concentrated short-distance winding or distributed winding.

[0012] When the winding 4 is a concentrated short-distance winding, it can be realized by a stringing process. Each phase winding is formed b...

specific Embodiment approach 2

[0016] Embodiment 2: The difference between this embodiment and the high-efficiency high-speed permanent magnet synchronous motor described in Embodiment 1 is that the stator core is a split structure, and the stator core is composed of a yoke core 11 and a tooth core 12. Composition, the yoke core 11 and the tooth core 12 are both cylindrical, and on the outer peripheral surface of the tooth core 12, there are a plurality of holes parallel to the central axis of the tooth core 12 along the axial direction. The tooth slot 121 , the armature winding 4 is embedded in the tooth slot 121 , the permanent magnet 21 in the rotor is fixed on the rotating shaft 22 , and the permanent magnet sheath 23 is fixed outside the permanent magnet 21 .

[0017] In this embodiment, the inner wall of the yoke core 11 and the tooth slot 121 on the tooth core 12 form the slot through hole 10 for embedding the winding. The yoke core 11 and the tooth core 12 can keep rotating synchronously. The end o...

specific Embodiment approach 3

[0020] Embodiment 3: The difference between this embodiment and the high-efficiency high-speed permanent magnet synchronous motor described in Embodiment 1 is that the stator core is a split structure, and the stator core is composed of a yoke core 11 and a tooth core 12. A plurality of straight slots 111 parallel to the central axis of the yoke core 11 are formed on the inner peripheral surface of the yoke core 11 in the axial direction. The number is the same; the shape of the end of the tooth 122 on the outer circumference of the tooth core 12 is the same as the shape of the inner wall of the straight groove 111 on the inner wall of the yoke core 11, and the end of the tooth 122 of the tooth core 12 is the same as that of the yoke The straight grooves 111 on the inner wall of the core 11 are engaged.

[0021] When the high-speed permanent magnet synchronous motor described in this embodiment has 12 slots 121 and the permanent magnet 21 of the rotor is 2 poles, the structure...

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Abstract

The invention provides a highly efficient high-speed permanent magnetic synchronous motor, which relates to the technical field of motors, and the synchronous motor solves the problems of little leakage reactance, the great harmonic component of winding current and the high frequency loss of the stator and the rotor of a motor, which exist in the existing high-speed permanent magnetic synchronous motor. The motor comprises a stator, a rotor and an air gap, and is of an inner rotor structure; the rotor comprises a permanent magnet, a permanent magnet sheath and a rotating shaft, and the stator comprises a stator core and a winding; one side of the stator core, which is near a shaft center, has a plurality of cogging through holes opened along an axial direction, and the cogging through holes are used for embedding and placing the winding; the stator core can also adopt a split type, namely that the core is divided into a yoke core and a cogging core, the yoke core is cylindrical, the inside of the cogging core is cylindrical, and the external circumference of the cogging core has a plurality of coggings opened along an axial direction used for embedding and placing the winding; the cogging core is embedded into the yoke core to form the stator core. The synchronous motor can not only be used as a high-speed motor, but also be used as a high-speed generator, thereby having wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a structure of a permanent magnet synchronous motor. Background technique [0002] Due to the high speed and high power density of high-speed motors, the geometric size of high-speed motors is much smaller than that of low- and medium-speed motors of the same power, which has become a research hotspot in the field of motors. At present, the application fields of high-speed motors are becoming more and more extensive, such as high-speed grinding machines and other processing machine tools, high-speed flywheel energy storage systems, high-speed centrifugal compressors and blowers used in natural gas transmission and sewage treatment, etc. Recently, micro gas turbines driving high-speed generators for distributed power supply systems have received increasing attention. Permanent magnet motors are most suitable for high-speed motors due to their simple structure, high for...

Claims

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Application Information

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IPC IPC(8): H02K21/12
Inventor 寇宝泉李伟力刘奉海李立毅
Owner HARBIN INST OF TECH
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