A fractional slot multiphase air-core compulsator with concentrated winding
Compulsator is a specially designed generator capa¬ble of delivering high current pulses to a low-impedance load, such as the electromagnetic railgun. In order to increase the tip speed of the rotor, advanced composite materials have been used in the recent compulsator prototype, which is mentioned...
| Main Authors: | , , , , , |
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| Format: | Article |
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Institute of Electrical and Electronics Engineers
2017
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| Online Access: | https://eprints.nottingham.ac.uk/43866/ |
| _version_ | 1848796785521197056 |
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| author | Zhao, Weiduo Wu, Shaopeng Cui, Shumei Gerada, Christopher Zhang, He Xu, Zhuang |
| author_facet | Zhao, Weiduo Wu, Shaopeng Cui, Shumei Gerada, Christopher Zhang, He Xu, Zhuang |
| author_sort | Zhao, Weiduo |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Compulsator is a specially designed generator capa¬ble of delivering high current pulses to a low-impedance load, such as the electromagnetic railgun. In order to increase the tip speed of the rotor, advanced composite materials have been used in the recent compulsator prototype, which is mentioned as air core instead of the traditional iron core. For typical air-core compulsators, there are no slots and steel teeth to place the armature windings due to the nonmachinability of composite materials. Therefore, concentric windings in racetrack style are often adopted instead of traditional lap winding in most cases, since it is more convenient to be fixed by composite materials. However, overlap occurs at the end winding part for multiphase compulsators, which are not easy to be formed during the manufacture process. In this paper, a fractional slot multiphase air-core compulsator with concentrated windings is proposed and analyzed. The main advantage of fractional slot configuration is that it can offer a concentrated winding structure under certain conditions, which means each coil only spans one “tooth,” and will not cause any intersection between each phase at the end winding. Two referenced fractional slot air-core compulsators with two phases, six poles, and four “slots” or eight “slots” (q = 1/3 and q = 2/3, q is the “slot” per pole per phase) are analyzed and compared with the performance of a traditional integral slot machine. The results indicated that the output voltage and self-excitation performance of a fractional slot compulsator can reach the same level with an integral slot one, and the discharging performance can reach an acceptable level. Thus, the fractional slot multiphase concept can be further used to improve the manufacture process of the winding in the future. |
| first_indexed | 2025-11-14T19:53:30Z |
| format | Article |
| id | nottingham-43866 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:53:30Z |
| publishDate | 2017 |
| publisher | Institute of Electrical and Electronics Engineers |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-438662020-05-04T18:46:53Z https://eprints.nottingham.ac.uk/43866/ A fractional slot multiphase air-core compulsator with concentrated winding Zhao, Weiduo Wu, Shaopeng Cui, Shumei Gerada, Christopher Zhang, He Xu, Zhuang Compulsator is a specially designed generator capa¬ble of delivering high current pulses to a low-impedance load, such as the electromagnetic railgun. In order to increase the tip speed of the rotor, advanced composite materials have been used in the recent compulsator prototype, which is mentioned as air core instead of the traditional iron core. For typical air-core compulsators, there are no slots and steel teeth to place the armature windings due to the nonmachinability of composite materials. Therefore, concentric windings in racetrack style are often adopted instead of traditional lap winding in most cases, since it is more convenient to be fixed by composite materials. However, overlap occurs at the end winding part for multiphase compulsators, which are not easy to be formed during the manufacture process. In this paper, a fractional slot multiphase air-core compulsator with concentrated windings is proposed and analyzed. The main advantage of fractional slot configuration is that it can offer a concentrated winding structure under certain conditions, which means each coil only spans one “tooth,” and will not cause any intersection between each phase at the end winding. Two referenced fractional slot air-core compulsators with two phases, six poles, and four “slots” or eight “slots” (q = 1/3 and q = 2/3, q is the “slot” per pole per phase) are analyzed and compared with the performance of a traditional integral slot machine. The results indicated that the output voltage and self-excitation performance of a fractional slot compulsator can reach the same level with an integral slot one, and the discharging performance can reach an acceptable level. Thus, the fractional slot multiphase concept can be further used to improve the manufacture process of the winding in the future. Institute of Electrical and Electronics Engineers 2017-05-23 Article PeerReviewed Zhao, Weiduo, Wu, Shaopeng, Cui, Shumei, Gerada, Christopher, Zhang, He and Xu, Zhuang (2017) A fractional slot multiphase air-core compulsator with concentrated winding. IEEE Transactions on Plasma Science . ISSN 0093-3813 Compulsators electromagnetic launch frac¬tional slot windings multiphase railguns http://ieeexplore.ieee.org/document/7932892/ doi:10.1109/TPS.2017.2705243 doi:10.1109/TPS.2017.2705243 |
| spellingShingle | Compulsators electromagnetic launch frac¬tional slot windings multiphase railguns Zhao, Weiduo Wu, Shaopeng Cui, Shumei Gerada, Christopher Zhang, He Xu, Zhuang A fractional slot multiphase air-core compulsator with concentrated winding |
| title | A fractional slot multiphase air-core compulsator with concentrated winding |
| title_full | A fractional slot multiphase air-core compulsator with concentrated winding |
| title_fullStr | A fractional slot multiphase air-core compulsator with concentrated winding |
| title_full_unstemmed | A fractional slot multiphase air-core compulsator with concentrated winding |
| title_short | A fractional slot multiphase air-core compulsator with concentrated winding |
| title_sort | fractional slot multiphase air-core compulsator with concentrated winding |
| topic | Compulsators electromagnetic launch frac¬tional slot windings multiphase railguns |
| url | https://eprints.nottingham.ac.uk/43866/ https://eprints.nottingham.ac.uk/43866/ https://eprints.nottingham.ac.uk/43866/ |