Brushless Operation of a Wound-Field Synchronous Machine Using a Novel Winding Scheme
- Authors
- Ayub, Muhammad; Hussain, Asif; Jawad, Ghulam; Kwon, Byung-Il
- Issue Date
- Jun-2019
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Brushless operation; sub-harmonic magnetomotive force (SH-MMF); winding scheme; wound-field synchronous machine (WFSM)
- Citation
- IEEE TRANSACTIONS ON MAGNETICS, v.55, no.6
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON MAGNETICS
- Volume
- 55
- Number
- 6
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/2882
- DOI
- 10.1109/TMAG.2019.2893883
- ISSN
- 0018-9464
- Abstract
- This paper proposes a novel winding scheme to generate an additional sub-harmonic magneto-motive force (SH-MMF) component for the brushless (BL) operation of a wound-field synchronous machine. The existing SH generation schemes for BL operation use a dual inverter or a single inverter with asymmetrical winding and low slot fill factor in half of the stator. The proposed scheme comprises a single inverter with symmetrical stator winding distribution and the same fill factor for all stator slots. The generated additional SH-MMF component in the proposed scheme is induced in the harmonic winding wound on the machine rotor. A rotating bridge rectifier mounted on the rotor periphery connects the rotor harmonic winding with the rotor field winding, and rectified dc is supplied to the rotor field winding. The 2-D finite-element analysis (FEA) was carried out to analyze the principle, and the FEA predictions were experimentally validated.
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