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Linear Motor

A linear motor and armature technology, applied in the direction of electrical components, electromechanical devices, electric components, etc., can solve the problems of detecting the relative position of the salient poles, unable to detect the relative position of the salient poles, etc., and achieve the effect of simple structure

Active Publication Date: 2017-06-16
YASKAWA DENKI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the salient poles are not a magnetic field generating element such as a permanent magnet, so the relative position of the salient poles cannot be detected from the magnetic field generated from the stator side.
Therefore, it is difficult to detect the relative position of the salient poles by employing a simple structure of a magnetic field sensor

Method used

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Embodiment Construction

[0017] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the description, the same elements or elements having the same functions are assigned the same reference numerals, and overlapping descriptions are omitted.

[0018] The linear motor 1 according to the present embodiment can be used for table feed and the like in FA equipment such as various manufacturing devices and processing devices, for example. Such as figure 1 as well as figure 2 As shown, the linear motor 1 includes an armature 2 and a stator 3 facing each other across a gap. The stator 3 has an elongated shape extending perpendicularly to the direction facing the armature 2, and is fixed to an installation object (for example, the main body of the FA device). A linear guide (not shown) supports the armature 2 so that the armature 2 can freely move along the longitudinal direction of the stator 3 . The armature 2 is fixed to a driving ob...

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Abstract

The invention provides a linear motor which can detect the relative position of salient poles relative to the armature by using a simple structure. A linear motor (1) includes a stator (3) and an armature (2) facing each other across a gap. The stator (3) has a long strip shape extending perpendicularly to the opposite direction to the armature (2), and has a plurality of strips arranged along the length direction of the strip shape and protruding toward the armature (2) side respectively. salient pole (3b). The armature (2) has: an armature core (4) constituting teeth (6) protruding toward the stator (3) side, an armature winding (7) wound on the teeth (6), and along the stator (3) A plurality of permanent magnets (8) arranged in the longitudinal direction of the tooth (6) and a magnetic field sensor (10) for detecting the magnetic field generated by the permanent magnets (8) and passing through the salient pole (3b).

Description

technical field [0001] The present invention relates to linear motors. Background technique [0002] The linear motor includes an armature and a long stator facing each other across a gap, and relative motion of the armature and the stator occurs along the longitudinal direction of the stator. As one such linear motor, there is disclosed a motor in which an armature core, an armature winding, and a plurality of permanent magnets are provided on an armature, and a plurality of salient poles are provided in a stator (for example, refer to Patent Document 1). . The armature core constitutes teeth protruding toward the stator side, and the armature winding is wound on the teeth. The plurality of permanent magnets are provided on the tip sides of the teeth and are arranged in a row along the longitudinal direction of the stator. The plurality of salient poles are arranged along the longitudinal direction of the stator, and each protrudes toward the armature. The armature coor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K41/03
CPCH02K41/033H02K29/08H02K41/03H02K41/031
Inventor 牧野省吾大户基道有永雄司
Owner YASKAWA DENKI KK