Self-excitation and energy recovery of air-core compulsators
As power supplies, compulsators are popular choices for high-end railgun power supplies. In order to increase power and energy density, air-core compulsators are proposed by using composite materials instead of traditional iron-core compulsators. Due to the absence of ferromagnetic material, the flu...
| 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/43865/ |
| _version_ | 1848796785260101632 |
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| author | Zhao, Weiduo Wu, Shaopeng Cui, Shumei Gerada, C. Zhang, He Xu, Zhuang |
| author_facet | Zhao, Weiduo Wu, Shaopeng Cui, Shumei Gerada, C. Zhang, He Xu, Zhuang |
| author_sort | Zhao, Weiduo |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | As power supplies, compulsators are popular choices for high-end railgun power supplies. In order to increase power and energy density, air-core compulsators are proposed by using composite materials instead of traditional iron-core compulsators. Due to the absence of ferromagnetic material, the flux density in the air-core compulsator can reach to 4–6 T instantaneously, which is much higher than the saturation field strength in traditional iron-core machines. Therefore, self-excitation topology is essential for the air-core compulsator to obtain up to 100-kA field current. This paper carried out research on the key parameters of self-excitation efficiency first, and then focus on the large magnetic energy remained in the inductive field winding after one shot, an implementation scheme and control strategy of energy recovery of air-core compulsator was proposed and analyzed. By controlling the field rectifier working at active inverter state after one discharge process, the magnetic energy stored in the field winding can be converted to rotor kinetic energy again. The simulation results indicate that the energy recovery efficiency can reach to 70% for a reference air-core compulsator. The continuous discharge number of times increased from 3 to 4 during one kinetic energy charging, which means that the delivered energy density increases 33.3%. |
| first_indexed | 2025-11-14T19:53:30Z |
| format | Article |
| id | nottingham-43865 |
| 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-438652020-05-04T19:56:51Z https://eprints.nottingham.ac.uk/43865/ Self-excitation and energy recovery of air-core compulsators Zhao, Weiduo Wu, Shaopeng Cui, Shumei Gerada, C. Zhang, He Xu, Zhuang As power supplies, compulsators are popular choices for high-end railgun power supplies. In order to increase power and energy density, air-core compulsators are proposed by using composite materials instead of traditional iron-core compulsators. Due to the absence of ferromagnetic material, the flux density in the air-core compulsator can reach to 4–6 T instantaneously, which is much higher than the saturation field strength in traditional iron-core machines. Therefore, self-excitation topology is essential for the air-core compulsator to obtain up to 100-kA field current. This paper carried out research on the key parameters of self-excitation efficiency first, and then focus on the large magnetic energy remained in the inductive field winding after one shot, an implementation scheme and control strategy of energy recovery of air-core compulsator was proposed and analyzed. By controlling the field rectifier working at active inverter state after one discharge process, the magnetic energy stored in the field winding can be converted to rotor kinetic energy again. The simulation results indicate that the energy recovery efficiency can reach to 70% for a reference air-core compulsator. The continuous discharge number of times increased from 3 to 4 during one kinetic energy charging, which means that the delivered energy density increases 33.3%. Institute of Electrical and Electronics Engineers 2017-07 Article PeerReviewed Zhao, Weiduo, Wu, Shaopeng, Cui, Shumei, Gerada, C., Zhang, He and Xu, Zhuang (2017) Self-excitation and energy recovery of air-core compulsators. IEEE Transactions on Plasma Science, 45 (7). pp. 1168-1174. ISSN 0093-3813 Compulsators Electromagneticlaunch Energy recovery Railguns Self-excitation http://ieeexplore.ieee.org/document/7929298/ doi:10.1109/TPS.2017.2700027 doi:10.1109/TPS.2017.2700027 |
| spellingShingle | Compulsators Electromagneticlaunch Energy recovery Railguns Self-excitation Zhao, Weiduo Wu, Shaopeng Cui, Shumei Gerada, C. Zhang, He Xu, Zhuang Self-excitation and energy recovery of air-core compulsators |
| title | Self-excitation and energy recovery of air-core compulsators |
| title_full | Self-excitation and energy recovery of air-core compulsators |
| title_fullStr | Self-excitation and energy recovery of air-core compulsators |
| title_full_unstemmed | Self-excitation and energy recovery of air-core compulsators |
| title_short | Self-excitation and energy recovery of air-core compulsators |
| title_sort | self-excitation and energy recovery of air-core compulsators |
| topic | Compulsators Electromagneticlaunch Energy recovery Railguns Self-excitation |
| url | https://eprints.nottingham.ac.uk/43865/ https://eprints.nottingham.ac.uk/43865/ https://eprints.nottingham.ac.uk/43865/ |