SiC Based Switch-Mode Power Amplifier for Active Magnetic Bearing

Prasad, KNV and Shruti, S and Narayanan, G (2022) SiC Based Switch-Mode Power Amplifier for Active Magnetic Bearing. In: 2022 IEEE Power and Energy Conference at Illinois, PECI 2022, 10-11 March 2022, Champaign.

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Abstract

Active Magnetic Bearing (AMB) is an electromagnetic system that supports the rotor of high-speed rotating machinery in a contactless manner through magnetic forces. Excitation coils of an AMB are fed from current-controlled power electronic converters for high-bandwidth closed-loop control of the radial forces on the rotor. This paper presents the design, fabrication, and testing of an SiC-based switched-mode power amplifier for feeding the excitation coil of an AMB. The scope includes determination of converter ratings, device selection, other component selection, PCB layout and testing. The converter ratings are determined based on the design of AMB and an estimate of the residual mass unbalance in the high-speed rotor to be supported. Device losses are compared for the Si and SiC based devices considered. Converter design based on SiC devices is discussed. Experimental results pertaining to double-pulse test, load test and current reference tracking are presented. © 2022 IEEE.

Item Type:	Conference Proceedings
Publication:	2022 IEEE Power and Energy Conference at Illinois, PECI 2022
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Bridge circuits; Load testing; Magnetic bearings; Magnetism; Polychlorinated biphenyls; Power converters; Silicon carbide, Active Magnetic Bearing; Asymmetric H-bridge converter; Bridge converter; Converter ratings; Double pulse; Double-pulse test; Excitation coils; H-bridges; Pulse test; Switch modes, Power amplifiers
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	19 May 2022 07:15
Last Modified:	19 May 2022 07:15
URI:	https://eprints.iisc.ac.in/id/eprint/72054

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