Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/27490
Title: A novel direct-drive dual-structure permanent magnet machine
Authors: Niu, S 
Ho, SL 
Fu, WN 
Keywords: Curvilinear element
Dual-structure
Finite-element method
Fractional-slot concentrated winding
Permanent magnetic motor
Vernier structure
Issue Date: 2010
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on magnetics, 2010, v. 46, no. 6, 5467589, p. 2036-2039 How to cite?
Journal: IEEE transactions on magnetics 
Abstract: By incorporating the merits of fractional-slot concentrated windings and Vernier machine structure, a new multi-pole dual-structure permanent magnet (PM) machine is proposed for low speed, direct-drive applications in this paper. In the outer stator, a fractional-slot concentrated winding is adopted to reduce the slot number and stator yoke height, hence saving space and improving torque density. In the inner stator, a Vernier structure is used to reduce the winding slots, thereby enlarging the slot area to accommodate more conductors, thus the inner stator space is fully utilized. Consequently, the merits of these two structures can be ingeniously integrated into one compact PM machine and the torque density is improved, cogging torque is reduced and the control flexibility with two sets of independent stator windings is increased. By using time-stepping finite element method with curvilinear elements for moving between the stator and the rotor, the steady state and transient performances of the PM machine are simulated and the validity of proposed dual-structure PM machine is verified.
URI: http://hdl.handle.net/10397/27490
ISSN: 0018-9464
EISSN: 1941-0069
DOI: 10.1109/TMAG.2010.2041197
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