Permanent magnet linear motor with low thrust pulsation

A permanent magnet linear motor, low thrust technology, applied in the direction of electrical components, electromechanical devices, propulsion systems, etc., can solve the problem of large thrust pulsation, achieve the effect of reducing the pulse amplitude, reducing the time spent, and improving the waveform

Active Publication Date: 2017-06-20
SUZHOU VEGA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this invention is that the thrust pulsation is relatively large

Method used

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  • Permanent magnet linear motor with low thrust pulsation
  • Permanent magnet linear motor with low thrust pulsation
  • Permanent magnet linear motor with low thrust pulsation

Examples

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Embodiment Construction

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] like figure 1 The shown embodiment is a permanent magnet linear motor with low thrust pulsation, which includes a long strip-shaped secondary 1 and a primary 2 that is arranged above the secondary and can move along the length of the secondary; There is a gap between the lower surface and the secondary upper surface. The primary is composed of iron chips 3 stacked vertically in sequence. The lower part of each iron chip is provided with a straight tooth 4 in a fractional groove structure. Straight slots 5 are formed, and coils are arranged on each odd-numbered straight tooth arranged from left to right; the secondary side includes a long bar-shaped yoke 6, and bar-shaped permanent magnets 7 arranged in two rows at intervals on the upper surface of the yoke ; Adjacent permanent magnets in the permanent magnets in the same row are arranged ...

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Abstract

The invention discloses a permanent magnet linear motor with low thrust pulsation, which comprises a strip-shaped secondary and a primary which is arranged above the secondary and can move along the length direction of the secondary; the primary lower surface and the secondary are arranged on a supporting frame There is a gap between the upper surfaces of the stage, and the primary is composed of several iron chips stacked vertically in sequence. The lower part of each iron chip is equipped with straight teeth in a fractional groove structure, and straight grooves are formed between adjacent straight teeth. Coils are provided on each odd-numbered spur tooth or each even-numbered spur tooth arranged from left to right; the secondary includes a long bar-shaped yoke and two rows of bar-shaped permanent magnets arranged at intervals on the upper surface of the yoke The adjacent permanent magnets in the same line of permanent magnets are arranged at intervals, the polarities of the same direction ends of the adjacent permanent magnets in the same line of permanent magnets are different, and the polarities of the adjacent ends of the relative permanent magnets of the two rows of permanent magnets in the front and back are the same. The invention has the characteristics of effectively suppressing the thrust pulsation of the linear motor by suppressing the magnetic resistance and cogging force at the end.

Description

technical field [0001] The invention relates to the technical field of permanent magnet linear motors, in particular to a permanent magnet linear motor with low thrust pulsation that can effectively suppress thrust pulsation under the premise of keeping the thrust density constant. Background technique [0002] Linear motors are a new type of direct drive technology developed recently. Because linear motors have outstanding advantages such as zero transmission chain, no contact, no backlash, high stiffness, and fast response, linear motors are gradually replacing servo motors and ball screws. And other indirect servo mechanisms have become the core functional components of high-speed, precision and high-end equipment. Due to the special structure of the linear motor, its magnetic circuit is no longer continuous and closed like the permanent magnet synchronous motor, and there is an edge effect; and because the iron core is slotted, the magnetic circuit is no longer uniform, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K41/03
Inventor 廖有用俞岳平韩旭奎陈俊峰
Owner SUZHOU VEGA TECH CO LTD
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