Stator punching structure of permanent magnet motor

A technology for stator punching and permanent magnet motors, which is applied in the direction of magnetic circuit shape/style/structure, synchronous motors with stationary armatures and rotating magnets, and static parts of magnetic circuits, which can solve the noise pollution of permanent magnet motors, The problems of high cost and reduced performance of permanent magnets can achieve the effects of low cost, convenient processing and reduced loss

Inactive Publication Date: 2015-03-11
SHENYANG POLYTECHNIC UNIV
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Problems solved by technology

However, the vibration of the permanent magnet motor will cause noise pollution, and more importantly, it will reduce its performance. Therefore, a small change in the structure or design parameters, or relatively simple targeted measures can greatly improve the performance of the permanent magnet motor. reduce noise
The methods usually used in the past, such as chamfering of permanent magnets and oblique poles, but the cost is high, the process is troublesome, etc.

Method used

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  • Stator punching structure of permanent magnet motor
  • Stator punching structure of permanent magnet motor
  • Stator punching structure of permanent magnet motor

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Embodiment

[0026] Where a is the angle occupied by each stator tooth, b is the angle occupied by the distance between the first two points of the tooth chamfer, θ The angle of chamfering for the stator teeth, when there is no chamfering, such as Figure 4 As shown, the distortion rate of the air-gap flux density waveform is 10.062%; when b / a is 0.5, and the chamfering angle θ is 10°, as Image 6 As shown, the air-gap magnetic density waveform distortion rate is 8.992%. It can be seen from the comparison that the harmonic content of the air gap magnetic density after chamfering is reduced, which reduces the loss of the motor, improves the efficiency, and reduces the influence of noise and torque fluctuation on the performance of the motor.

[0027] The working principle of the present invention is as follows:

[0028] By chamfering both ends of the stator teeth to establish unequal air gaps, reducing the harmonic content of the air gap magnetic field, reducing losses, improving motor e...

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Abstract

The invention mainly relates to a stator punching structure of a permanent magnet motor, and belongs to the technical field of permanent magnet motors. The air-gap magnetic flux density waveforms are optimized by cutting angles from two ends of a stator tooth; the ratio of a distance between two start points of each cut angle at a tooth part to the angle and the ratio of each stator tooth to the angle are set within a range of 0.4-0.6; the angle theta of each cut angle is set within a range of 5-15 degrees. According to the structure, the harmonic content of the air-gap magnetic flux density is reduced, loss and vibration noise of the motor are reduced, and the performance of the motor is improved. The punching structure is simple, is convenient to manufacture, is lower in cost and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet motors, and mainly relates to a stator punching structure of a permanent magnet motor. Background technique [0002] Permanent magnet motors have many advantages such as small size, light weight, small moment of inertia, fast dynamic response, and stable dynamic performance. In recent years, the research and popularization and application of permanent magnet motors have received widespread attention. However, the vibration of the permanent magnet motor will cause noise pollution, and more importantly, it will reduce its performance. Therefore, a small change in the structure or design parameters, or relatively simple targeted measures can greatly improve the performance of the permanent magnet motor. reduce noise. The methods commonly used in the past, such as chamfering of permanent magnets and oblique poles, have high costs and troublesome processes. Contents of the invention purp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/22H02K1/14
CPCH02K21/22H02K1/14
Inventor 王晓宇赵海宁
Owner SHENYANG POLYTECHNIC UNIV
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