The Influence of Magnetic Field of AMB on Eddy-Current Sensor Operation

This paper presents laboratory results on the influence of the magnetic field of an active magnetic bearing (AMB) on the eddy-current sensor operation. The magnetic suspension technology enables continuous diagnostics and monitoring of a rotary machine and eliminates drawbacks of classical bearing p...

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Bibliographic Details
Published inSensors (Basel, Switzerland) Vol. 23; no. 4; p. 2332
Main Authors Kurnyta-Mazurek, Paulina, Kurnyta, Artur
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 20.02.2023
MDPI
Subjects
active magnetic bearings (AMBs)
Actuators
Amplifiers (Electronics)
Bearings
Configurations
Control algorithms
control system
Cooperation
Design
Eddy current testing
Eddy currents
eddy-current sensors
Energy consumption
Friction
high-speed machine
Magnetic bearings
Magnetic fields
Magnetic levitation
Magnetic properties
Position measurement
Rotary machines
Sensors
eddy-current sensors
high-speed machine
control system
active magnetic bearings (AMBs)
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Summary:This paper presents laboratory results on the influence of the magnetic field of an active magnetic bearing (AMB) on the eddy-current sensor operation. The magnetic suspension technology enables continuous diagnostics and monitoring of a rotary machine and eliminates drawbacks of classical bearing properties. The magnetic bearing system usually consists of two radial and one axial magnetic bearing. It is combined with a control unit, amplifiers and sensors for measuring the instantaneous position of the shaft. For this purpose, eddy-current sensors are frequently used. They operate in close proximity to the electromechanical actuators; therefore, the question arises whether the actuators do not interfere with the correct operation of these sensors. In the paper, the test rig and research plan prepared for that investigation are delivered. Measurement signals were registered from four control channels for different configurations of power supplies for system elements, e.g., with sensors and AMBs turned off, with sensors turn on and at normal work. Recorded time courses are presented and discussed in the paper. For the prepared test rig and AMB/eddy-current sensor configuration, no significant influence of the generated magnetic field from the support is found for the eddy-current sensor output.
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ISSN:1424-8220
1424-8220
DOI:10.3390/s23042332