Driver Circuit Improvement of Eddy Current Sensor in Displacement Measurement of High-Speed Rotor

Sun, Maolin; Zhou, Jin; Dong, Baotian; Zheng, Shiqiang

doi:10.1109/jsen.2020.3044592

Cited by 13 publications

(2 citation statements)

References 19 publications

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“…Any variation in the excitation signal will result in a variation in the sensor output signal, causing erroneous position readings and faulty control of the AMB. The traditional oscillation circuit for eddy current sensors such as the Colpitts oscillator is sensitive to the circuit parameters [18]. Considering the frequency stability and easy realization of the circuit, an active crystal oscillator is used to generate the excitation signal due to its high quality factor.…”

Section: A Excitation Circuitmentioning

confidence: 99%

Driver Circuit Design for a New Eddy Current Sensor in Displacement Measurement of Active Magnetic Bearing Systems

et al. 2022

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Section: A Excitation Circuitmentioning

confidence: 99%

Driver Circuit Design for a New Eddy Current Sensor in Displacement Measurement of Active Magnetic Bearing Systems

et al. 2022

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“…Moreover, an ECDS can have high sensitivity, a fast response time and a strong anti-interference ability [8][9][10]. ECDSs are applied in active magnetic bearing (AMB) systems [11], vehicle brake systems [12], condition monitoring of mechanical equipment, dimensional inspection of machine parts, touch over metal applications [13], and eddy current limit switches [14].…”

Section: Introductionmentioning

confidence: 99%

A magnetic head-based eddy current displacement sensing method

Chen,

Li,

Guo

et al. 2023

Phys. Scr.

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Eddy current displacement sensors are popular for sensing changes in displacement in industrial fields with many advantages. The eddy current induced by a conventional coil is distributed over a large range and the energy is not concentrated. The size of the minimum measured surface is 1.5 to 3 times the diameter of the coil. A magnetic head-based eddy current displacement sensor is proposed in this paper. Theoretical analysis confirms that the coil generates a highly concentrated magnetic field at the magnetic core gap. The simulations based on the finite element method are performed. The simulation results demonstrate that the proposed method can induce the eddy current field which has a small distribution range and high degree of concentration of energy on the surface of the specimen. Finally, experiments are conducted for different sized ring-shaped surfaces. The high similarity between the experimental results indicates that the magnetic head-based eddy current displacement sensor can induce a highly focused eddy current field with a distribution range of 3 mm. The sensitivity of the sensor is 5 V mm−1 and the spatial resolution of the sensor is 3 mm.

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Optimal Calculation Method of Coil Impedance for Multi Pole Symmetrical Inductive Sensor with Uneven Air Gap

Chen¹,

Ren²,

Li³

et al. 2023

Lecture Notes in Electrical Engineering

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Driver Circuit Improvement of Eddy Current Sensor in Displacement Measurement of High-Speed Rotor

Cited by 13 publications

References 19 publications

Driver Circuit Design for a New Eddy Current Sensor in Displacement Measurement of Active Magnetic Bearing Systems

Driver Circuit Design for a New Eddy Current Sensor in Displacement Measurement of Active Magnetic Bearing Systems

A magnetic head-based eddy current displacement sensing method

Optimal Calculation Method of Coil Impedance for Multi Pole Symmetrical Inductive Sensor with Uneven Air Gap

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