Dual-stator magnetism-gathering permanent magnet linear motor with concentrated winding of phase windings

Abstract

The invention provides a dual-stator magnetism-gathering permanent magnet linear motor with concentrated winding of phase windings, which comprises a mover and two single-sided stators arranged at twosides of the mover face to face, wherein the mover is a magnetism-gathering permanent magnet mover structure, permanent magnets are horizontally magnetized along the movement direction of the mover,and two adjacent permanent magnets are opposite in magnetization direction; at least one of the single-sided stators is provided with windings and has a mode of concentrated winding of the phase windings. Each single-sided stator is a certain air gap distance away from the mover, the two air gap distances are equal, and the two single-sided stators has an offset of one stator tooth width along themovement direction of the mover. The permanent magnet linear motor provided by the invention has high power density and output thrust, and effectively suppresses the magnetic resistance and thrust fluctuation.

Description

technical field [0001] The disclosure belongs to the field of design and manufacture of linear motors, in particular to a double-stator phase-group concentrated winding and magnetism-concentrating permanent magnet linear motor. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Compared with rotary motors, linear motors can directly realize the mutual conversion of electrical energy and mechanical energy generated by linear motion without any intermediate conversion mechanism. Therefore, the application of linear motors can reduce costs, reduce equipment volume, and improve energy conversion efficiency. It also has the advantages of simple structure and high precision. At present, linear motors have been widely used in tidal power generation, rail transportation, artillery launch and other fields. [0004] However, according to the invento...

AI Technical Summary

Problems solved by technology

However, due to the relatively complex structure of the mover with magnetic concentration effect, there are relatively few technical researches on it to reduce electromagnetic thrust fluctuations, and there are many problems

For example: the optimal pole design of the permanent magnet can reduce the electromagnetic thrust fluctuation, but at the cost of accurate arc parameter calculation and thrust density degradation; the sinusoidal permanent magnet design can maintain a high output thrust and greatly reduce the thrust fluctuation, but due to the permanent magnet The structure is relatively complicated and can only be applied to low magnetic pole motors

Other methods, such as permanent magnet skew, also inevitably bring performance degradation and manufacturing difficulties

Images