Dynamic field modelling of torque and radial forces in vector-controlled induction machines with bearing relief

Ungku Anisa Ungku Amirulddin Al Amin, G. M. Asher, P. Sewell, K. J. Bradley

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The paper addresses the bearingless induction motor based on the concept of dual-pole windings, one controlling the motor torque and the other the generated radial forces. Such machines have been investigated experimentally in the past. The paper presents a simulation model capable of investigating the effect of induction-machine design on the generation and control of the radial force. The simulation is based on the dynamic reluctance-mesh field model embedded in vector control systems for the decoupled control of torque, flux and radial force. In the paper, the rotor is constrained by a mechanical bearing so that the radial force is used to cancel the rotor weight to effect 'bearing relief. The paper summarises the modelling method, investigates the radial force production in both cage and wound rotor machines, and introduces a mixed field orientation method for the decoupled control of the torque and radial forces. Simulations are undertaken showing good generation of radial force under zero speed, acceleration and transient load conditions.

Original languageEnglish
Pages (from-to)894-904
Number of pages11
JournalIEE Proceedings: Electric Power Applications
Volume152
Issue number4
DOIs
Publication statusPublished - 01 Jul 2005

Fingerprint

Bearings (structural)
Torque
Rotors
Torque motors
Machine design
Induction motors
Poles
Fluxes
Control systems

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

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abstract = "The paper addresses the bearingless induction motor based on the concept of dual-pole windings, one controlling the motor torque and the other the generated radial forces. Such machines have been investigated experimentally in the past. The paper presents a simulation model capable of investigating the effect of induction-machine design on the generation and control of the radial force. The simulation is based on the dynamic reluctance-mesh field model embedded in vector control systems for the decoupled control of torque, flux and radial force. In the paper, the rotor is constrained by a mechanical bearing so that the radial force is used to cancel the rotor weight to effect 'bearing relief. The paper summarises the modelling method, investigates the radial force production in both cage and wound rotor machines, and introduces a mixed field orientation method for the decoupled control of the torque and radial forces. Simulations are undertaken showing good generation of radial force under zero speed, acceleration and transient load conditions.",
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Dynamic field modelling of torque and radial forces in vector-controlled induction machines with bearing relief. / Ungku Amirulddin Al Amin, Ungku Anisa; Asher, G. M.; Sewell, P.; Bradley, K. J.

In: IEE Proceedings: Electric Power Applications, Vol. 152, No. 4, 01.07.2005, p. 894-904.

Research output: Contribution to journalArticle

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AU - Ungku Amirulddin Al Amin, Ungku Anisa

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AU - Bradley, K. J.

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