volume | PIER Journals

2019-08-15

A Low Bias Current Integral Type Optimal Control Scheme for a Hybrid Magnetic Bearing

Subhankar Pusti,

Dr. Subhankar Pusti

Department of Electrical Engineering

Indian Institute of Engineering Science and Technology

India

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Tapan Santra,

Dr. Tapan Santra

Electrical Engineering Department

Kalyani Government Engineering College

India

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Debabrata Roy

Prof. Debabrata Roy

Electrical Engineering Department

Indian Institute of Engineering Science & Technology

India

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Progress In Electromagnetics Research M, Vol. 83, 203-211, 2019

doi:10.2528/PIERM19061903

Abstract

This paper presents an application of integral type optimal control scheme for rotor positioning of a hybrid magnetic bearing (HMB) in one degree of freedom (1-DOF) using low bias current. It is observed that higher biasing current enhances the linearity and disturbance rejection capability but at a cost of higher copper loss in the actuator. So, selection of biasing in an HMB system is very crucial. In the proposed scheme the dc biasing current can be varied by adjusting the axial offset to the rotor magnet. Analysis has been conducted to achieve the optimal biasing current for better performance of the HMB. A prototype of the HMB system has been fabricated and tested which represents quite satisfactory axial vibration characteristics under low biasing current.

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Subhankar Pusti, Tapan Santra, and Debabrata Roy, "A Low Bias Current Integral Type Optimal Control Scheme for a Hybrid Magnetic Bearing," Progress In Electromagnetics Research M, Vol. 83, 203-211, 2019.
doi:10.2528/PIERM19061903

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