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Method for assembly of internal rotor of permanent magnet motor

A technology of permanent magnet motor and assembly method, which is applied in the direction of magnetic circuit rotating parts, manufacturing stator/rotor body, magnetic circuit shape/style/structure, etc., which can solve the problem of unstable rotation of the motor, shape and position tolerance, and failure to meet the requirements of permanent magnets. Problems such as the coaxiality of the inner hole of the rotor iron core in the outer diameter size can overcome the uneven thickness and meet the effect of high-precision motors

Active Publication Date: 2014-12-31
PHASE MOTION CONTROL NINGBO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing technology cannot meet the roundness of the outer diameter of the permanent magnet and the coaxiality of the inner hole of the rotor core, and cannot guarantee a uniform air gap magnetic field, so that the assembled motor can be easily rotated To solve the problem of instability, provide an assembly structure and method that has good concentricity and outer diameter tolerance requirements after the rotor core and magnetic permanent magnet are assembled
The use of this assembly device overcomes the problems of dimensional tolerance and shape tolerance after assembly caused by the uneven thickness of the permanent magnet, thus meeting the needs of high-precision motors

Method used

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  • Method for assembly of internal rotor of permanent magnet motor
  • Method for assembly of internal rotor of permanent magnet motor
  • Method for assembly of internal rotor of permanent magnet motor

Examples

Experimental program
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Embodiment 1

[0028] An assembly structure of the inner rotor of a permanent magnet motor, suitable for the assembly of the inner rotor of a permanent magnet motor, including a mandrel 5, a base 6 and a positioning base 1 (see attached Figure 4 ). The magnetic steel 3 for the inner rotor is uniformly adhered to the surface of the inner rotor iron core 4 . The positioning base 1 is clamped on the front surface of the base 6, the base 6 is cylindrical as a whole, the base 6 is made of non-magnetic material, the front of the base 6 is provided with a fixing groove for fixing the positioning base 1, and the lower surface of the base 6 There is a screw hole in the center, and the base 6 is connected with one end of the mandrel 5 by a screw. The positioning base 1 is in a tubular shape as a whole, and the outer wall of the positioning base 1 is closely matched with the fixing groove on the base 6. The inner wall of the positioning base 1 is Cylindrical, the inner wall of the positioning base 1 ...

Embodiment 2

[0036] Embodiment 2 is basically the same as Embodiment 1, except that in Embodiment 2, an external fixing groove is provided on the positioning base 1 corresponding to each magnetic steel slot of the inner rotor, and the distance between the external fixing groove and the center of the surface of the positioning base 1 is The distance at the position is greater than the distance from the inner rotor magnetic steel slot to the center of the positioning base 1. The outer fixing slot is filled with a coil for offsetting the magnetic steel polarity of the inner rotor. When the coil is energized, a magnetic field is generated. When the coil is energized, the polarity of the center of the positioning base 1 is also arranged clockwise in the order of S pole, N pole. Pole, S pole, N pole, S pole, N pole.

[0037] A method for assembling the inner rotor of a permanent magnet motor, which is suitable for the assembly structure of the inner rotor of the permanent magnet motor, especiall...

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Abstract

The invention relates to a structure and a method for assembly of an internal rotor of a permanent magnet motor. The problems of the roundness of the outside diameter of a permanent magnet and the coaxiality of an inner hole of a rotor core after attachment in the prior art can be solved. According to the technical scheme, a key point is that the structure comprises a spindle, a base and a positioning pedestal, wherein the positioning pedestal is connected with the front surface of the base in a clamping way, the spindle is movably connected with the base, and the inner wall of the positioning pedestal is cylindrical, the structure is characterized in that the inner wall is provided with a plurality of groups of magnetic steel clamping slots for the internal rotor, the magnetic steel clamping slots are filled with magnetic steel and are arranged correspondingly and uniformly, the positioning pedestal is provided with external fixing slots corresponding to the magnetic steel clamping slots for the internal rotor, and the external fixing slots are filled with external magnetic bodies or coils. The problems of dimensional tolerance and shape tolerance caused by non-uniform thickness of the permanent magnets after assembly can be solved, and demands of a high-precision motor can be satisfied.

Description

technical field [0001] The invention relates to a method for assembling a motor, in particular to a method for assembling an inner rotor of a permanent magnet motor. Background technique [0002] Permanent magnet synchronous motors are widely used due to their high energy efficiency, high power density and high torque density. At present, the structure of commonly used permanent magnet motors is divided into radial flux cylindrical permanent magnet motors and axial flux disc permanent magnet motors according to the direction of magnetic flux passing through the air gap. The radial flux cylindrical permanent magnet motor has two structures: an outer rotor and an inner rotor. Most of the radial flux cylindrical permanent magnet motors are designed with an inner rotor structure. Generally speaking, the rotor inertia of the inner rotor structure is low, which is suitable for situations that require fast acceleration and deceleration, and the expected torque inertia is relativel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27H02K1/28H02K15/03
Inventor 吴乾军韩军董瑜堂
Owner PHASE MOTION CONTROL NINGBO