A novel two-phase BPM drive system with high power density and low cost

A novel brushless permanent-magnet (BPM) motor drive system is proposed in this paper. The basic motor structure consists of a stator with four salient pole pieces and a six pole, permanent-magnet rotor. The proposed drive system, using four switches, fully utilizes the stator ampere-turns by provid...

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Bibliographic Details
Main Authors: Yue Li, Walls, T.A., Lloyd, J.D., Skinner, J.L.
Format: Conference Proceeding
Language:English
Subjects:
Conducting materials
Costs
Finite element methods
Motor drives
Power generation
Rotors
Shape
Stators
Stress
Switches
Online Access:Request full text
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Summary:A novel brushless permanent-magnet (BPM) motor drive system is proposed in this paper. The basic motor structure consists of a stator with four salient pole pieces and a six pole, permanent-magnet rotor. The proposed drive system, using four switches, fully utilizes the stator ampere-turns by providing 180 electrical degree bipolar current conduction. Hence, the use of motor materials is maximized and very high power density is achieved. In addition, the quasi-square wave back-EMF and matching current wave shape guarantee minimum peak current stress on the drive. The low stress on the power devices and efficient use of active materials result in a drive system with a lower cost than conventional three-phase BPM drives of comparable output power. The advantages of the proposed system over three-phase BPM motor drives are illustrated using sizing analysis, finite element analysis (FEA), time domain simulations and experimental studies. It can be expected that a variety of industrial applications will follow up on this new technology.
ISSN:0197-2618
2576-702X
DOI:10.1109/IAS.1997.643147