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Stator-modularized double-stator consequent-pole cylindrical permanent magnet linear motor

A permanent magnet linear motor, modular technology, applied in magnetic circuits, electromechanical devices, electrical components, etc., can solve the problems of large thrust fluctuation, low thrust density, and high stator eddy current loss, and achieve higher thrust density, higher efficiency, and lower Effect of Eddy Current Loss

Pending Publication Date: 2022-05-24
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a stator modular double-stator alternating pole cylindrical permanent magnet linear motor, which solves the problems of low thrust density, high stator eddy current loss, and large thrust fluctuation in the prior art

Method used

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  • Stator-modularized double-stator consequent-pole cylindrical permanent magnet linear motor
  • Stator-modularized double-stator consequent-pole cylindrical permanent magnet linear motor
  • Stator-modularized double-stator consequent-pole cylindrical permanent magnet linear motor

Examples

Experimental program
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Effect test

Embodiment 3

[0031] Example 3, on the basis of Example 2, the air gap width between the pole shoe module and the mover is 1mm. The outer stator unit 6 includes an outer pole shoe lamination 12, an outer stator tooth 13, an outer back iron 14, and an inner stator unit 5 includes an inner pole shoe lamination 15, an inner stator tooth 16, an inner back iron 17. Specifically, the outer ring surface distance of the outer pole shoe lamination 12 inner ring surface distance from the outer ring permanent magnet 10 or the ring pole 11 of the outer ring pole 8 is 1mm, and the outer ring surface distance of the inner ring permanent magnet 10 or the ring pole 11 of the inner ring of the mover is 1mm, and after simulation analysis, the motor structure can be made to achieve the best space utilization rate while ensuring a high thrust density requirement.

Embodiment 4

[0032] Example 4, on the basis of Example 3, the back iron is a silicon steel back iron, the ring magnetic pole 11 is a silicon steel ring magnetic pole 11, the permanent magnet is a rare earth permanent magnet. The stator teeth are soft magnetic composite material teeth, the circumferential adjacent pole shoe lamination, adjacent stator teeth are filled with soft magnetic composite material structure, soft magnetic composite structure and soft magnetic composite material teeth are integrated molding, integrated molding can ensure the position accuracy of pole shoe lamination, stator teeth, back iron, reduce the efficiency of the motor due to installation errors.

Embodiment 5

[0033] Example 5, on the basis of Example 4, the pie winding 7 between the axial adjacent stator teeth is provided with two layers, the pie winding 7 is tightly arranged between the axial adjacent stator teeth, forming a distributed setting of the pie winding 7. The characteristics of the cake winding 7 are more concentrated for multiple sets of coils, which improves the magnetic density of the motor air gap and avoids the waste of the end windings, and increases the utilization rate of the windings.

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Abstract

The invention discloses a stator-modularized double-stator consequent-pole cylindrical permanent magnet linear motor, and relates to the technical field of linear servo motors. A consequent pole structure is adopted, so that the use amount of permanent magnets is reduced, and the cost is reduced; the inner stator units and the outer stator units are arranged in a staggered mode, and the annular permanent magnets and the annular magnetic poles on the two sides of the rotor iron core are arranged in a staggered mode, so that thrust fluctuation of the motor can be effectively reduced, and electromagnetic performance of the motor is improved. The inner stator and the outer stator are formed by axially overlapping modularized inner stator units and modularized outer stator units, each of the inner stator units and the outer stator units is composed of a pole shoe module, a tooth module and a back iron module which are fixedly arranged in the radial direction, and meanwhile, the pole shoe modules, the tooth modules and the back iron modules are further subjected to circumferential modularization treatment; eddy-current loss of the motor stator can be reduced, and efficiency of the motor is improved. The inner and outer double-stator structure increases the space utilization rate of the motor and improves the thrust density of the motor.

Description

Technical field [0001] The present invention relates to the technical field of linear servo motor, in particular refers to a stator modular double stator alternating pole cylindrical type permanent magnet linear motor. Background [0002] Cylindrical permanent magnet linear motor is widely used in vibration and energy converter systems, electromagnetic active suspension systems, compressor systems, heart pump systems and other direct drive systems because of its simple structure, high thrust density, and no transverse end effect and unilateral magnetic pull. Since the 1950s, many universities, companies and research machines, generators, aircraft thrusters and other fields of cylindrical linear motors in many universities and companies around the world have been researching. At present, there have been more research on the cylindrical permanent magnet linear motor body, but the application of the cylindrical linear motor is still limited, and there is still a problem of large mot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K16/04H02K41/02H02K1/34H02K1/14H02K1/18
CPCH02K16/04H02K41/02H02K1/34H02K1/14H02K1/185H02K1/187H02K2213/12H02K2213/03
Inventor 刘小梅王明杰贾宛英邱洪波杨存祥陈文博季玉琦王豪苒
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY