External rotor motor

An external rotor motor and external rotor technology, applied to synchronous motors with stationary armatures and rotating magnets, magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc., can solve the problem of affecting the stability of the motor and hindering the application , high noise and other issues, to achieve the effect of improving running stability, suppressing high-order harmonics, and reducing noise

Active Publication Date: 2014-11-19
JIANGXI GONGBU MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the excitation magnetic field of the permanent magnet rotor or the stator winding is not an ideal sinusoidal distribution, there will be obvious pulsating torque wh

Method used

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Embodiment Construction

[0011] see Figure 1-5 , The outer rotor motor provided by the present invention includes an outer rotor and a stator 1 located inside the outer rotor, the stator is fixedly mounted on a central shaft 2, and the two ends of the central shaft are fixedly supported in two supports 9 respectively. The two ends of the outer rotor are fixedly connected with fixed discs 3, and the fixed discs are rotatably connected with the central shaft through rotor bearings 4. The outer rotor includes a cylindrical rotor housing 5, and the rotor housing is fixed with a There are several permanent magnets 6, and the several permanent magnets adopt the same tile-shaped hexahedron structure and are arranged regularly along the circumferential direction (direction along the circumference) and the axial direction (direction parallel to the axis of the central axis), any circumferential direction and The number of permanent magnets arranged in any axial direction is multiple, and the two circumferenti...

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Abstract

The invention relates to an external rotor motor. A rotor shell is internally and fixedly provided with a plurality of permanent magnets which are the same tile-shaped hexahedral structures and are regularly arranged along a circumferential direction and an axial direction. A plurality of permanent magnets are arranged in any circumferential and any axial direction. Two circumferential side faces of the permanent magnets are inclined plane shapes with inside cutting angle shapes, and the angle of a cutting angle is 5 degrees to 35 degrees. The outer edge of a permanent magnet cross section in a radial direction is a circular arc line shape whose center is at the axis of the rotor shell. The inner edge of the permanent magnet cross section in a radial direction is a single arc shape or a curved line formed by connecting a plurality of arc shapes mutually. The permanent magnets are made of high performance NdFeB materials, the lengths of the permanent magnets are between 30mm and 95mm, and the thicknesses of the permanent magnets are between 8mm and 18mm. The external rotor motor has the advantages of good stability, small vibration, low noise and high power in low-speed operation and is especially suitable for a drum direct drive crane lifting mechanism and the like.

Description

technical field [0001] The invention relates to an outer rotor motor, in particular to a low-speed, high-torque outer rotor permanent magnet synchronous motor. Background technique [0002] The existing outer rotor permanent magnet synchronous motor usually includes an outer rotor and a stator located inside the outer rotor, the stator is fixedly installed on the central shaft, and the two ends of the outer rotor are fixedly connected with fixed disks, and the fixed disks pass through The rotor bearing is rotatably connected with the central shaft. The outer rotor includes a cylindrical rotor shell and permanent magnets fixed in the rotor shell. The stator includes a stator core made of stacked punched iron core pieces and embedded in The winding on the stator core is connected to the AC power supply in a certain way. When the winding is energized, a rotating magnetic field is generated to interact with the permanent magnet on the outer rotor, driving the outer rotor to rota...

Claims

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Application Information

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IPC IPC(8): H02K21/22H02K1/27H02K1/28
Inventor 彭祖军
Owner JIANGXI GONGBU MACHINERY
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