Abstract
In this paper, the open-circuit dc-winding-induced voltage in a wound field switched flux (WFSFs) machines is analyzed. The phenomenon of open-circuit dc-winding-induced voltage is illustrated and the mechanism is explained. Rotor skewing is proposed to reduce the open-circuit dc-winding-induced voltage, and the optimal skewing angle is analytically derived based on the analytically deduced harmonic orders of the open-circuit dc-winding-induced voltage. Finite-element (FE) analyses show that the open-circuit dc-winding-induced voltages in the analyzed 12-stator-pole partitioned stator WFSF machines having 10-, 11-, 13-, and 14-rotor-pole rotors can be effectively reduced by >94%, while the ac-winding phase-fundamental back-EMFs can be maintained by >95%. Twelve/ten-stator/rotor-pole prototypes with skewed and nonskewed rotors are built and tested to verify the analytical and FE results.
Original language | English |
---|---|
Article number | 8365132 |
Pages (from-to) | 1715-1726 |
Number of pages | 12 |
Journal | IEEE Transactions on Industrial Electronics |
Volume | 66 |
Issue number | 3 |
Early online date | 24 May 2018 |
DOIs | |
Publication status | Published - 1 Mar 2019 |
Keywords
- AC winding
- dc winding
- dc-winding-induced voltage
- field winding
- flux switching
- open circuit
- skewing
- step skewing
- wound field switched flux (WFSF) machine
ASJC Scopus subject areas
- Control and Systems Engineering
- Electrical and Electronic Engineering