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Linear step motor position sensing system

A technology of stepping motor and sensing system, applied in the control system, electrical components, motor generator control and other directions, can solve the problems of error, the stability of closed-loop position control cannot meet the requirements, etc., and achieve the effect of high-precision position control

Inactive Publication Date: 2005-04-13
HIWIN MIKROSYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Because after the rotor of the traditional linear stepping motor moves on the stator, the protruding teeth on the surface of the stator will leave a messy magnetic field (the N and S poles on the rotor will alternately generate when the rotor moves, and the size of the magnetic field will also change with the speed of the movement. And change), when the magnetic sensor passes the stator after the rotor, it will be affected by the residual stray magnetic field on the stator and produce an inestimable error, so that the position control stability of the closed loop cannot meet the requirements

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  • Linear step motor position sensing system
  • Linear step motor position sensing system

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Embodiment Construction

[0019] The linear stepping motor is a product that uses the principle of magnetic levitation pole repulsion to directly drive the workpiece to perform complex space trajectory movement; and the position sensing system sends the signal of the detected movement to the control when the linear stepping motor moves. The device enables the movement of the linear stepping motor to have the function of position feedback.

[0020] figure 1 It is a schematic diagram of the linear stepping motor position sensing system of the present invention, wherein the position sensing system includes a magnetic sensor 20 and a residual magnetic field stabilizing device 10, and the magnetic sensor 20 is completely surrounded by the residual magnetic field stabilizing device 10, when the position sensing When the measuring system moves in any direction on the stator 30 of the linear stepping motor, it uses the principle of magnetic induction to sense the change of magnetic flux density between the sta...

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Abstract

This invention relates to a linear step motor position sensing measurement system mainly composed of a magnetic transducer and a residual magnetic field stabilizer capable of turning the original random residual magnetic field to one with fixed value on the stator so as to get an accurate position feedback value and get accurate position control with the help of compensation.

Description

technical field [0001] The invention relates to a motor position sensing system, in particular to a linear stepping motor position sensing system. Background technique [0002] Generally, the linear stepping motor is mainly moved forward by the interaction of the rotor and the stator with a fixed pitch; the rotor has variable magnetic poles and the stator is composed of many convex teeth with a fixed pitch; by Change the magnetic poles on the rotor so that the rotor moves on the stator at a fixed pitch. [0003] However, with the rapid development of science and technology, the demand for high positioning accuracy arises spontaneously. In order to achieve high positioning accuracy, a magnetic position sensor is added to the linear stepping motor; usually the sensor is composed of convex teeth and magnetic induction components and its It provides a magnetic field itself. When the rotor position changes, the measured position signal is sent to the control device to form a clo...

Claims

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Application Information

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IPC IPC(8): H02P8/22H02P8/34
Inventor 萧舜兴
Owner HIWIN MIKROSYST
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