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Hiren M. Patel,
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Jagrut J. Gadit,
- Research Scholar Department of Electrical Engineering, Faculty of Technology and Engineering, The Maharaja Sayajirao University of Baroda, Vadodara Gujarat India
- Associate Professor Department of Electrical Engineering, Faculty of Technology and Engineering, The Maharaja Sayajirao University of Baroda, Vadodara Gujarat India
Abstract
An electromagnetic launcher has established itself as the system with great potential against the traditional propulsion system in power system, industry, space and defence-based applications. The performance of these launchers is represented by the force exerted on the projectile of the launching system. Better the force better is the impact of projectile. Present field of research aims to the improvement of reluctance coilgun type electromagnetic launcher based on the novel structure of driving coils of excitation circuits compared to conventional cylindrical structures. Two approaches are investigated in this research: tapered- and curvature- conical coil structure. Also, the performance of the projectile structures based on these approaches are studied. Outstanding and distinct performance of proposed driving coil structures are noticed in terms of force on projectile. Electromagnetic launcher system is considered based on electromagnetic effect observed in 2-D finite element analysis-based simulations. This substantial research endeavoured to improve the force performance of reluctance type electromagnetic launcher. Introduction: An electromagnetic launcher (EML) is preferred over conventional liquid-based launcher as it overcome the drawback of conventional system. Also, the coilgun type of electromagnetic launcher has better performance compared to other launchers for long distance applications. Earlier extensive work has been carried out to identify the performance of the EML. For greater performance of the reluctance coilgun type EML, proper design of driving coils, projectile and switching circuit must be carried out. This research focuses on improved design of driving coil which is used as excitation to such EML. Objectives: Superior performance of reluctance coilgun type electromagnetic launcher is expected in the form of force experienced by the projectile which represents the higher impact of EML. By following novel structure of driving coils of EML i.e. tapered- and curvature- conical coil structures, higher force will be obtained. Methods: To get higher impact of EML, the magnitude of force experienced by the projectile of the EML must be of higher value. Tapered- and curvature- conical coil structures of driving coils improve the force performance. 2-dimensional (2-D) finite element analysis-based simulation is carried out with the electromagnetic effect, to find the force on a projectile. Results: Tapered- and curvature- conical coil structures of driving coils which are used for excitation and to produce electromagnetic force on projectile are simulated. Normal and reverse direction of tapered- and curvature- conical coil structure of driving coils are simulated and magnitude of force on projectile are obtained in each case. Similarly, same case study is followed in the case of projectile structure. Finally, the comparative study with base case i.e. conventional cylindrical structure of EML for force evaluation is obtained. Conclusions: From this extensive work, it is concluded that tapered- and curvature- conical coil structure of driving coil based EML have improved force values compared to base case which is cylindrical one while their reversed cases have lower values compared to base case. Also, the tapered- and curvature- conical projectile structure case have lower value than base case. Research has identified the best case where if driving coils are provided with curvature shape in normal direction than force value is highest compared to other i.e. it has higher impact.
Keywords: Electromagnetic launcher, reluctance coilgun, finite element analysis, driving coils, projectile, force analysis
[This article belongs to Trends in Electrical Engineering(tee)]
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Trends in Electrical Engineering
Volume | 14 |
Issue | 01 |
Received | February 29, 2024 |
Accepted | April 4, 2024 |
Published | May 23, 2024 |