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Permanent magnetic brushless DC four-quadrant electric machine

A permanent magnet brushless DC, four-quadrant technology, applied in the magnetic circuit static parts, magnetic circuit rotating parts, magnetic circuit shape/style/structure and other directions, can solve the problem of high processing cost, achieve high reliability, The effect of convenient maintenance and improved efficiency

Inactive Publication Date: 2012-05-23
林祥钟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional rotor permanent magnets adopt the shape of tiles, such as figure 1 As shown, wire cutting is expensive, and the magnetic field waveform is trapezoidal

Method used

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  • Permanent magnetic brushless DC four-quadrant electric machine
  • Permanent magnetic brushless DC four-quadrant electric machine
  • Permanent magnetic brushless DC four-quadrant electric machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0021] Such as image 3 As shown, the stator and rotor poles of the motor body adopt a 3:2 tooth-to-pole ratio and a geometric structure of bilateral salient poles. The stator 2 is punched out of silicon steel sheets, and a centralized The field winding 1 is connected in series to form a phase; the rotor is composed of a rotating shaft 6, a rotor iron core 4, a rectangular magnetic steel 5, a magnetic shoe 3 (conducting magnetic block) and a magnetic isolation collar 7 to form a cylinder; the rotor It has multiple convex magnetic poles and is made of high-performance rare earth permanent magnet (NdFeB) material. The magnetic circuit structure is radial, and the magnetic isolation collar tightly fixes the magnetic shoes, permanent magnets, iron cores and structural parts of the rotating shaft at corresponding positions, forming a cylindrical rotor. The ...

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PUM

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Abstract

This invention relates to a permanent magnet brushless DC 4-quadrant motor, in which, magnetic poles of the stator and rotor are in a symmetric geometrical structure with salient poles at either side and 3:2 tooth pole ratio, the groove number of the stator winding is the pole number of the rotor plus 2 or 4, centralized excitation windings serial to each other are mounted on the two symmetric salient poles of the stator to form a phase, the rotor is composed of an axis, a soft magnetic core, a permanent magnet, a magnetic shoe and a ringer, the magnet is installed on the subsurface of soft core of the rotor to form a magnetic pole rotating synchronously and an opposite vertical angle is formed to a column rotor at the outer circle of the pole shoe of the magnet by the non-magnetism ringer and an interference method.

Description

Technical field: [0001] The technical field of the present invention is electromechanical integration engineering, which provides a permanent magnet brushless high-power DC four-quadrant motor. Background technique: [0002] DC motors are widely used due to their excellent characteristics. However, due to the need for a mechanical commutator, the DC motor has poor reliability and requires frequent maintenance. Moreover, electromagnetic interference is generated during commutation, and the noise is large, thus affecting its further application. With the development of power electronics technology and computer control, permanent magnet brushless DC motors with electronic commutation instead of mechanical commutation have emerged. Compared with other motors, the biggest feature of the brushless DC motor is that the switching converter controlled by the rotor position signal replaces the mechanical commutation device in the brushed DC motor, so that it has the excellent speed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/12H02K1/27
Inventor 赵桂标
Owner 林祥钟
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