Dual-inverter-controlled brushless operation of wound rotor synchronous machines based on an open-winding patternopen access
- Authors
- Bukhari S.S.H.; Sirewal G.J.; Chachar F.A.; Ro J.-S.
- Issue Date
- May-2020
- Publisher
- MDPI AG
- Keywords
- Brushless operation; Open-winding pattern; Third-harmonic MMF; Wound rotor synchronous machines
- Citation
- Energies, v.13, no.9
- Journal Title
- Energies
- Volume
- 13
- Number
- 9
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/42822
- DOI
- 10.3390/en13092205
- ISSN
- 1996-1073
1996-1073
- Abstract
- In an open-winding machine, three-phase stator currents can be controlled such that the input armature currents may contain the third-harmonic current component in addition to the fundamental. Considering this attribute of open-winding patterns, a harmonic current field excitation technique for a wound rotor synchronous machine (WRSM) is proposed in this paper based on the control of time-harmonic magneto-motive force. Two inverters connected to both terminals of the stator winding are controlled so that the input armature current generates an additional third-harmonic current component. This third-harmonic component generates a vibrating magnetic field that induces a current in the specially designed rotor harmonic winding. The current is supplied as DC current to the rotor excitation winding to generate a rotor field by using a full-bridge diode rectifier in order to achieve brushless operation. The proposed dual-inverter-controlled brushless operation for a WRSM is executed in ANSYS Maxwell using 2-D finite element analysis to validate its operation and electromagnetic performance. © 2020 by the authors.
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