Permanent magnet linear motor and compressor having permanent magnet linear motor

A permanent magnet linear motor and permanent magnet technology, applied in the field of electric motors, can solve the problems of end magnetic flux leakage, serious problems, etc., and achieve the effects of reducing end magnetic flux leakage, reducing iron loss, and reducing weight

CN103516172AInactive Publication Date: 2014-01-15ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-01-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a permanent magnet linear motor and a compressor having the permanent magnet linear motor. According to the invention, the permanent magnet linear motor comprises an external stator which contains an external stator support and an external stator core arranged on the external stator support, and a mover which contains a mover support and N Halbach permanent magnets arranged along the circumference of the mover support, wherein magnetization directions of adjacent Halbach permanent magnets change delta degrees and the Halbach permanent magnets have smooth arc magnetic circuits. The compressor provided by the invention comprises the above permanent magnet linear motor. By the adoption of Halbach array, the magnetization directions of the permanent magnets are optimized, and end leakage is minimized so as to enhance single-side magnetic field. In addition, an inner stator of a motor can be saved, costs of the permanent magnet linear motor are saved, the weight of the permanent magnet linear motor is mitigated, iron loss of the motor is reduced, and efficiency of the motor is raised.
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Description

technical field

[0001] The invention relates to the field of electric motors, more specifically, to a permanent magnet linear motor and a compressor having the same. Background technique

[0002] Linear compressors are mainly developed gradually along with the development of linear motor drive technology. Linear motor is a power device that can directly convert electrical energy into mechanical energy for linear motion. It is a main engine that can provide high power and high thrust drive element. A linear motor generally consists of a stator and a mover, and the mover moves linearly under the drive of the stator.

[0003] Since the linear motor can directly produce continuous one-way or reciprocating short-stroke linear mechanical motion, it has changed the traditional intermediate mechanical transmission and transformation links such as chains, wire ropes, conveyor belts, racks and screws, worm gears, and crank linkages. It overcomes the defects of long transmission chai...

Examples

Embodiment Construction

[0028] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0029] Such as image 3 The permanent magnet linear motor according to the present invention comprises an outer stator 10, which includes an outer stator support 11 and an outer stator iron core 12 arranged on the outer stator support 11; a mover 20, which includes a mover support 21 and a mover support 21 There are N Halbach permanent magnets 22 arranged on the mover bracket 21 in the circumferential direction, wherein the magnetization direction of adjacent Halbach permanent magnets 22 is successively increased by δ angle and forms a smooth arc magnetic circuit.

[0030] Such as Figure 4 As shown, the permanent magnet linear motor adopting Halbach array arc-shaped magnetization of the present invention is a moving magnet linear motor, and the magnetization method of the Halbach permanent magnet placed on the motor mover is: the outer stator 10 is seque...