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Secondary structure of low-thrust waved sine wave permanent magnet liner synchronous motor

A technology of synchronous linear motor and secondary structure, applied in the direction of magnetic circuit shape/style/structure, electrical components, electromechanical devices, etc., can solve the problems of large fluctuations in positioning force and thrust, achieve high positioning accuracy and reduce electromagnetic thrust The effect of high pulsation, strength and reliability

Inactive Publication Date: 2011-11-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a secondary structure of a low thrust fluctuation sine wave permanent magnet synchronous linear motor, which solves the problem of large positioning force and thrust fluctuation of the existing longitudinal magnetic field cylindrical permanent magnet synchronous linear motor

Method used

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  • Secondary structure of low-thrust waved sine wave permanent magnet liner synchronous motor
  • Secondary structure of low-thrust waved sine wave permanent magnet liner synchronous motor
  • Secondary structure of low-thrust waved sine wave permanent magnet liner synchronous motor

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specific Embodiment approach 1

[0007] Specific implementation mode 1: the following combination Figure 1-Figure 15 To illustrate this embodiment, the air gap side surface of the secondary in this embodiment is wavy along the direction of movement, so that the air gap magnetic field formed by the secondary is distributed sinusoidally.

specific Embodiment approach 2

[0008] Specific implementation manner 2: the following combination Figure 1-Figure 6 This embodiment is described. This embodiment is a further explanation of the first embodiment: the secondary in this embodiment is an axisymmetric structure, which includes a secondary yoke 1 and a plurality of permanent magnets 2,

[0009] The outer surface of the secondary yoke cylinder 1 is the side surface of the secondary air gap, a plurality of axial through holes are opened under the outer surface of the secondary yoke cylinder 1, and the plurality of axial through holes are evenly distributed along the circumferential direction;

[0010] The permanent magnet 2 is in the shape of a tile or a flat plate. A plurality of permanent magnets 2 are arranged in each axial through hole with equal clearance. Each permanent magnet 2 is closely matched with the axial through hole. The positions of the magnets 2 respectively correspond to a wavy protrusion on the outer surface of the secondary yoke barr...

specific Embodiment approach 3

[0014] Specific implementation manner three: the following combination Figure 7 This embodiment is described. This embodiment is a further explanation of the first embodiment: the secondary in this embodiment is an axisymmetric structure, which includes a plurality of secondary yoke cylinders 1, a plurality of permanent magnets 2 and a spacer ring 3.

[0015] The secondary yoke cylinder 1 and the spacer ring 3 are closely arranged along the axial direction. The outer surface of the secondary yoke cylinder 1 is a protrusion on the secondary air gap side surface, and the outer surface of the spacer ring 3 is the secondary air gap side. The troughs on the surface,

[0016] A plurality of axial through holes are opened under the outer surface of each secondary yoke cylinder 1, and the plurality of axial through holes are evenly distributed along the circumferential direction;

[0017] The permanent magnet 2 is in the shape of a tile or a flat plate. A permanent magnet 2 is arranged in e...

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Abstract

The invention discloses a secondary structure of a low-thrust waved sine wave permanent magnet liner synchronous motor, belonging to the technical field of motors and solving the problems that the traditional longitudinal magnetic field cylindrical permanent magnet liner synchronous motor has large positioning force and push force. A secondary air gap lateral surface is optimized into an arc shape along the motion direction, so that the relative position between a permanent magnet and a secondary yoke roller or a secondary yoke plate can be arranged; and by the selection of the permanent magnet in the magnetizing direction, the motor with the secondary structure has a transverse magnetizing structure or a longitudinal magnetizing structure. The invention is used as the secondary structureof a linear motor.

Description

Technical field [0001] The invention relates to a secondary structure of a low thrust fluctuation sine wave permanent magnet synchronous linear motor, which belongs to the technical field of motors. Background technique [0002] The secondary structure of the traditional longitudinal magnetic field cylindrical permanent magnet synchronous linear motor is such as Figure 16 As shown, the secondary structure is mainly composed of a ring-shaped permanent magnet and a cylindrical magnetic yoke (cylinder). The permanent magnet is magnetized in a radial direction, and the N and S poles are arranged on the magnetic yoke in sequence along the axial direction. The advantage of this secondary structure is that the structure is simple, but it also has the following disadvantages: it is difficult to form a sine wave air gap magnetic field and a sine wave back EMF, so that the positioning force and thrust of the motor fluctuate greatly, and the control accuracy is low; because the ring permane...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K41/03H02K1/27
Inventor 寇宝泉白崟儒贵献国
Owner HARBIN INST OF TECH