Assembled scheme for brushless DC motor slot number and magnetic steel number

A technology of brushed DC motor and number of slots, which is applied in the direction of electrical components, electromechanical devices, magnetic circuit static parts, etc., can solve the problems of low-speed pulsation difficult to eradicate, radial component force, affecting bearing life, etc.

Inactive Publication Date: 2007-09-05
苏州扬名机电有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the small number of phases of brushless motors (three phases are most commonly used), the problem of low-speed pulsation has been difficult to eradicate
Its disadvantage is: there is a radial component force, which affects the bearing life
The scheme of 51 slots and 46 pieces of magnets has a fly in the ointment: the number of slots is greater than the number of magnets, and the utilization rate of copper wires is low

Method used

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  • Assembled scheme for brushless DC motor slot number and magnetic steel number
  • Assembled scheme for brushless DC motor slot number and magnetic steel number

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027] Example: Three-phase 33-slot 38-pole outer rotor brushless DC motor

[0028] Taking a three-phase motor as an example, according to the above principles, a motor structure with 33 slots in the stator and 38 poles in the rotor is selected. Figure 1 is a schematic diagram of the arrangement of the stator and rotor poles of the motor: the inside A, B, and C of the stator pole 1 indicate the phase sequence, and the outside N and S indicate the polarity of the pole. As shown in FIG. 1 , the N pole magnet 2 and the S pole magnet 3 of the rotor are bonded in the steel ring of the outer rotor. According to the arrangement diagram of stator polarity and phase sequence, the wiring diagram can be drawn. Figure 2 is the wiring diagram of the motor. For clear expression, the wiring diagram of phase A is also drawn specifically.

[0029] The phase sequence arrangement of the stator poles must not only meet the order of A, B, and C, but also meet the symmetry requirements of each pha...

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PUM

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Abstract

The invention is concerned with combination project for slot number of the non-brush direct current machine and the alnico number, the characteristic is: the slot number of the stator iron core is equal to the phase number multiply the prime number K that is smaller that the phase number of the electronic machine; alnico pole number of the rotor is equal to the slot number add the prime number that is not equal to 1 and phase number and smaller than K. the invention is: forms several closing magnetic circuit between the teeth in the electrify magnetic pole, which is not only increase the magnetic circuit conducting area effectively and short the magnetic circuit timely, but also reduce the loss of iron and copper.

Description

Technical field: [0001] The invention belongs to the electromechanical field, and in particular relates to an improvement of a brushless direct current motor, especially a combination scheme of the number of slots and the number of magnetic steels of the brushless direct current motor. Background technique: [0002] With the development of electronic technology, the application range of brushless DC motors has been greatly expanded, especially in the field of electric vehicles, and there is a tendency to completely replace brushed motors. [0003] Due to the small number of phases of brushless motors (three phases are most commonly used), the problem of low-speed pulsation has been difficult to eradicate. Solutions to this problem have been continuously proposed, including: inclined slot scheme, fractional slot scheme, and one-tooth difference (the stator winding adopts a single-span winding method, and the number of slots and the number of rotor magnets differ only by 1) sc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K29/00H02K1/16H02K3/12
Inventor 朱正风史玉福
Owner 苏州扬名机电有限公司
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