Modeling and control of an unbalanced magnetic rotor-bearing system as a bearingless motor. Issue 7 (2nd October 2017)

• Record Type: Journal Article
• Authors: Chen, Shyh-Leh; Lee, Pei-Hua; Toh, Chow-Shing
• Is Part Of: Engineering computations. Volume 34:Issue 7(2017)
• Page Start: 2212
• Page End: 2227
• Publication Date: 2017-10-02
• Subjects: Active magnetic bearing -- Bearingless motor -- Three-pole; Computer-aided engineering -- Periodicals; Computer graphics -- Periodicals; 620.00285
• DOI: 10.1108/EC-05-2017-0167
• Languages: English
• ISSNs: 0264-4401

Abstract

Abstract : Purpose: This paper is concerned with the design and analysis of a bearingless motor. Design/methodology/approach: The bearingless motor is obtained by a regular three-pole active magnetic bearing with an intentionally attached unbalanced mass on the rotor. It is the unbalanced mass that will generate the rotational torque for the motor function. Modeling and control of the unbalanced mass-type bearingless motor have been considered. Findings: It is found through simulations that both functions of motor and magnetic bearing can indeed be achieved in this system. Originality/value: This novel bearingless motor requires no additional windings and permanent magnets. Thus, it can greatly reduce the cost and design of the bearingless motor.