Stabilization of Passive Self-Bearing Motor Through D-axis Current Injection

Passive thrust self-bearing motor have been the subject of extensive research over the last few years, showing the possibility to reach the fully passive suspension of the rotor. However, this kind of machine becomes axially unstable above a certain rotation speed, requiring the introduction of an a...

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Bibliographic Details
Published inInternational Symposium on Power Electronics, Electrical Drives, Automation and Motion pp. 198 - 203
Main Authors Robert, Adrien, Van Verdeghem, Joachim, Dehez, Bruno
Format Conference Proceeding
LanguageEnglish
Published IEEE 19.06.2024
Subjects
Bearingless motor
Damping
Design methodology
Force
Magnetic damping
Motors
Numerical simulation
Passive suspension
Rotors
Stability criteria
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ISSN2835-8457
DOI10.1109/SPEEDAM61530.2024.10609061

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Summary:Passive thrust self-bearing motor have been the subject of extensive research over the last few years, showing the possibility to reach the fully passive suspension of the rotor. However, this kind of machine becomes axially unstable above a certain rotation speed, requiring the introduction of an axial damping to be used on the full speed range. Recent researches have shown that when reluctant effects are present in such machines, it is possible to create an axial force through the D-axis current component. This open the way to introduce the required damping directly from the machine and not from an external system. This paper investigates this possibility by imposing, via vector control, a D-axis current component proportional to the axial velocity. It demonstrates the effectiveness of this approach through quasi-static analyses and dynamic simulations.
ISSN:2835-8457
DOI:10.1109/SPEEDAM61530.2024.10609061