A self-sensing technology of active magnetic bearings using a phase modulation algorithm based on a high frequency voltage injection method View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2008-09

AUTHORS

Young Ho Park, Dong Chul Han, In Hwang Park, Hyeong Joon Ahn, Dong Young Jang

ABSTRACT

Conventional AMB(active magnetic bearings) systems consist of electromagnetic coils, position sensors, power amplifiers and a feedback controller. This hardware configuration can lead to a structural complexity, problems of space limitations for the installation, and position control difficulties due to the non-collocation of actuators and sensors. In this paper, a self-sensing mechanism is proposed to resolve such limitations of the general AMB system. The proposed self-sensing scheme uses a phase difference of the injected current of two opposite electromagnetic actuators while an object is levitating between the actuators. The relationship between the phase difference of injected currents and the position of a levitated object was theoretically derived and linearized. In order to realize the proposed self-sensing scheme, a signal processing algorithm was developed. The frequency response of the estimator was measured to verify the performance of the proposed self-sensing scheme. In addition, a magnetic levitation and a disturbance rejection response were experimentally obtained to verify the feasibility of the proposed self-sensing mechanism. Experimental results showed that the developed self-sensing technique has similar performance as a practical gap sensor. More... »

PAGES

1757-1764

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s12206-008-0608-1

DOI

http://dx.doi.org/10.1007/s12206-008-0608-1

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1022918991


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