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Asymmetric double-stator cylindrical permanent magnet linear motor

A permanent magnet linear motor, cylindrical technology, applied in electrical components, electromechanical devices, etc., can solve the problems of reduction, poor heat dissipation, thrust density limitation, etc., to achieve the effect of reducing consumption, avoiding heat dissipation difficulties, and low cost

Active Publication Date: 2015-04-29
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to reduce costs, the existing method is to use a cylindrical switch flux linkage permanent magnet linear synchronous motor, and place the permanent magnets on the armature. The amount of permanent magnets is small, and the length of the armature is not long. It brings new problems: on the one hand, the permanent magnet is surrounded by coils, and the heat dissipation conditions are too poor; on the other hand, the slot area and the permanent magnet are mutually restricted, and the thrust density is limited

Method used

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  • Asymmetric double-stator cylindrical permanent magnet linear motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 2 As shown, the overall schematic diagram of the asymmetric double-stator cylindrical permanent magnet linear motor of this embodiment, the magnetic pole part of the short stator is installed on a long shaft 3 inside, fixed by bolts 223 at both ends, and the two ends of the long shaft are supported by brackets It is fixed on the working platform 4; the long moving part is filled with liquid non-magnetic material and then separated after solidification, or directly separated by a non-magnetic ring. The hole is opened in the magnet block and fixed by long bolts 14, and then in the long Sliding bearings 13 are installed at both ends of the mover 1, and the air gap with the short stator pole part 22 is kept constant; the armature part of the short stator is directly fixed on the working platform 4 through the bracket 213, and the air gap with the long mover 1 is kept constant .

[0034] The asymmetric dual-stator cylindrical permanent magnet linear motor ad...

Embodiment 2

[0040] Such as Figure 4 As shown, the feature of this embodiment is that the number of magnet blocks of the long mover is different from the number of slots of the armature of the short stator by 2, and the rest are the same as in Example 1, and the radial magnetization structure is also adopted. In this embodiment, the asymmetrical double stator The working principle of the cylindrical permanent magnet linear motor is the same as that of the first embodiment. With the change of the position of the mover, the flux linkage in the armature winding is positive and negative alternating, which is basically sinusoidal and bipolar flux linkage.

Embodiment 3

[0042] Such as Figure 5 As shown, the characteristic of this embodiment is that the number of permanent magnets of the short stator is twice the number of teeth of the armature of the short stator.

[0043] The working principle of the asymmetric double-stator cylindrical permanent magnet linear motor in this embodiment is the same as that in Embodiment 1. With the change of the position of the mover, the flux linkage in the armature winding is positive and negative alternating, which is basically sinusoidal. Bipolar magnetic linkage.

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Abstract

The invention discloses an asymmetric double-stator cylindrical permanent magnet linear motor which comprises a short stator and a long rotor. The short stator is of a double-stator asymmetric structure, one side of the short stator is provided with an armature, the other side of the short stator is provided with a magnetic pole, the armature and the magnetic pole are fixed to a working platform, relatively rest, are independent from each other and are located on the different sides of the rotor. The long rotor is located between the two stator bodies. The advantages of a flux switching structure are achieved, and the defects that the magnetic pole is difficultly radiated, and a magnetic circuit and a circuit compete with each other are effectively avoided. The short stator armature portion is directly fixed to the working platform, the short stator magnetic pole portion is fixed to a long shaft, and a required gas length is kept between the long rotor and the short stator through a sliding bearing. According to the asymmetric double-stator cylindrical permanent magnet linear motor, the armature and the magnetic pole are used as the stator bodies in the short stator, so that the usage of a permanent magnet is greatly reduced, the radiating condition of the permanent magnet is not affected, and the asymmetric double-stator cylindrical permanent magnet linear motor is applicable to application occasions where the low-cost linear motion is needed in the fields of industry, civil use, medicine and the like.

Description

technical field [0001] The invention belongs to the technical field of synchronous motors, in particular to an asymmetric double-stator cylindrical permanent magnet linear motor. Background technique [0002] Cylindrical permanent magnet linear synchronous motor has the advantages of both permanent magnet motor and linear motor. It converts electrical energy directly into linear motion mechanical energy without intermediate linkage parts and is not affected by centrifugal force. It has the advantages of simple structure, light weight, small size, High-speed, high-precision, high-efficiency, high-thrust, convenient guiding and other significant advantages, it is widely used in semiconductor processing, food processing and other fields. The typical structure of cylindrical permanent magnet linear synchronous motor is as follows: figure 1 shown. [0003] The working principle of the cylindrical permanent magnet linear synchronous motor is as follows: When the armature winding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K16/04
CPCH02K16/04
Inventor 卢琴芬诸自强
Owner ZHEJIANG UNIV
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