Current Tracking Performance of an SiC Power Amplifier for Control of Electromagnetic Bearing with Good Disturbance Rejection

Prasad, KNV and Narayanan, G (2023) Current Tracking Performance of an SiC Power Amplifier for Control of Electromagnetic Bearing with Good Disturbance Rejection. In: National Power Electronics Conference, 14-12-2023 to 16-12-2023, Guwahati.

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Abstract

Electromagnetic Bearing (EMB) is an electromagnetic system that supports the rotor of a high-speed rotating machine in a contactless manner through magnetic forces. Excitation coils of an EMB 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 EMB current controller design procedure for a simplified model of the EMB coil, which ensures the current tracking despite the parameter variations. The disturbance forces that EMB experiences in various applications are reviewed. Simulation results are presented for the EMB system, with the designed current controller as part of position control for transient and loading conditions that an EMB experiences in various applications. The reference coil currents that are expected to be tracked by the power amplifier are generated using such simulations. The experimental results show that the designed power amplifier and the current controller can track these reference currents pertaining to dynamic and loading conditions. © 2023 IEEE.

Item Type:	Conference Paper
Publication:	2023 11th National Power Electronics Conference, NPEC 2023
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; Controllers; Disturbance rejection; Electric current control; Position control; Power converters; Silicon carbide, Active Magnetic Bearing; Asymmetric H-bridge converter; Bridge converter; Current controller; Current tracking; Electromagnetic bearings; H-bridges; Loading condition; Radial force on the bearing; Radial forces, Power amplifiers
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering Division of Electrical Sciences > Electrical Communication Engineering > Electrical Communication Engineering - Technical Reports Division of Electrical Sciences > Electrical Engineering
Date Deposited:	04 Mar 2024 07:16
Last Modified:	04 Mar 2024 07:16
URI:	https://eprints.iisc.ac.in/id/eprint/84228

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