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A Displacement Detection Method Based on Weak Coupling Between Detection Coil and Magnetic Bearing

A detection coil and displacement detection technology, applied in measuring devices, using electromagnetic means, electromechanical devices, etc., can solve problems such as unfavorable rotor displacement high-precision measurement, and achieve high integration, reduced cost and volume, and high space utilization. Effect

Active Publication Date: 2021-11-19
NAVAL UNIV OF ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this detection coil winding scheme, the change of the detection coil inductance is not only affected by the change of the rotor position, but also interfered by the change of the magnetic flux of the magnetic bearing, and does not use high-precision measurement of the rotor displacement

Method used

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  • A Displacement Detection Method Based on Weak Coupling Between Detection Coil and Magnetic Bearing
  • A Displacement Detection Method Based on Weak Coupling Between Detection Coil and Magnetic Bearing
  • A Displacement Detection Method Based on Weak Coupling Between Detection Coil and Magnetic Bearing

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Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] The invention discloses a displacement detection method for the weak coupling between the detection coil and the magnetic bearing. The detection coil is wound on the teeth of the stator core of the magnetic bearing, so that the magnetic flux passing through the detection coil formed by the magnetic bearing approaches zero, and the adjacent The two detection coils are connected in series to form an inductance, and the displacement detection of the rotor is realized by detecting the change of the inductance value of the inductance. The change of the inductance value of the inductor is detected by an AC bridge detection circuit or a resonant frequency of a resonant circuit.

[0019] Among them, two inductors symmetrically connected along the central axis of the stator core of the magnetic bearing are connected in series to form a ...

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Abstract

The invention relates to the technical field of motor state perception and monitoring, and discloses a displacement detection method for weak coupling between a detection coil and a magnetic bearing. The magnetic flux is close to zero, and two adjacent detection coils are connected in series to form an inductance, and the rotor displacement detection is realized by detecting the change of the inductance value of the inductance. The invention discloses a displacement detection method for the weak coupling between the detection coil and the magnetic bearing, which can effectively reduce the cost and volume of the magnetic bearing system, and the position of the sensor and the actuator is the same, which can realize the in-situ detection of the displacement of the bearing rotor and further improve the stability of the control of the rotor. .

Description

technical field [0001] The invention relates to the technical field of motor state perception and monitoring, in particular to a displacement detection method for weak coupling between a detection coil and a magnetic bearing. Background technique [0002] Magnetic bearings have the advantages of no mechanical friction and wear, no lubrication, and small damping, and have been widely used in many fields. As an important part of the magnetic bearing system, displacement detection plays a vital role in the stable control of the magnetic bearing. In a sense, the performance of the displacement sensor directly affects the accuracy of the stable suspension of the magnetic bearing rotor. [0003] At present, the displacement sensor commonly used in the magnetic bearing system is the eddy current displacement sensor, but its structure is complex and the cost is high, and the installation displacement of the displacement sensor and the displacement of the magnetic bearing actuator ar...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/02H02K11/225
CPCG01B7/02H02K11/225
Inventor 李文印王东胡靖华苏振中吴超李志
Owner NAVAL UNIV OF ENG PLA