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Space rotating magnetic field generating apparatus and control method thereof

A magnetic field generating device and space rotation technology, which is applied in the direction of magnets, magnetic objects, manufacturing tools, etc., can solve the problems of discontinuous rotating magnetic field and inability to achieve arbitrary rotation axes

Inactive Publication Date: 2008-09-03
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can only generate a rotating magnetic field on some fixed rotating axes, but not any rotating axis, and the rotating magnetic field is discontinuous

Method used

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  • Space rotating magnetic field generating apparatus and control method thereof
  • Space rotating magnetic field generating apparatus and control method thereof
  • Space rotating magnetic field generating apparatus and control method thereof

Examples

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0045] The theoretical method of using three-phase alternating current to generate a spatial rotating magnetic field with an arbitrary rotating axis is as follows: figure 1 As shown, it is a method using spatial magnetic field superposition and spatial coordinate transformation. Assume that there is a rotating magnetic field with field strength B0 and angular frequency ω, and the rotation axis is in the Z-axis direction. After space coordinate transformation, the original coordinate system is rotated by α, β and γ angles around the X axis, Y axis and Z axis respectively, so that the rotation axis is transformed to the position where the orientation angles of the original coordinate system are θ and Φ. The field strength B0 and angular frequency ω do not change before and after the coordinate transformation. The original rotating magnetic fiel...

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Abstract

The present invention provides a space rotating magnetic field generating device of random rotating axle, the coil part (2) is three groups pairwise orthogonal Helmholtz coils, every group coil is made up of three groups winding Helmholtz coils, and three groups coil connect each phase of three-phase current respectively. According to parameter of rotating magnetic field (1) required by user, rotating axle direction angle Theta, Phi determines initial position of rotating magnetic field Gamma, angular frequency of rotating magnetic field Omega and amplitude of rotating magnetic field B0, CPU (311) obtains variation magnetic field produced by three groups coils: BX,BYand BZ, and obtains impulse width and frequency of corresponding modulating signal, three groups waveform generators (312) of control power source part (3) inversion produce three groups three-phase current, supply for three groups coils, and produces three direction variation magnetic field. The required rotating magnetic field (1) is obtained after the three variation magnetic fields are overlapped in space. Impulse width and frequency of every waveform generator (312) modulating signal can be adjusted for changing rotating axle of rotating magnetic field, amplitude, frequency and initial position.

Description

technical field [0001] The invention relates to a generator of a rotating magnetic field and a control method thereof, in particular to a generator of a rotating magnetic field in space for driving an arbitrary rotating shaft of a magnetic micro robot and a control method thereof. Background technique [0002] With the development of modern industrial technology, there are more and more applications of rotating magnetic fields. In the automatic power supply system, a static power converter with a rotating magnetic field transformer is used to reduce electromagnetic interference; in the magnetic particle flaw detection of the main weld seam of boilers and pressure vessels, in order to improve the detection efficiency and detect defects in multiple directions, a rotating magnetic field is used Type magnetic flaw detector; in the solidification process of various alloys, a rotating magnetic field device is used to obtain new materials with better performance. Among the many ap...

Claims

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Application Information

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IPC IPC(8): H01F7/00G01R33/38B25J13/00A61B17/00
Inventor 王喆王铮于阳
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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