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Open AccessArticle

Optimisation of Energy Transfer in Reluctance Coil Guns: Application to Soccer Ball Launchers

1
IM2NP—UMR 7334, CNRS, Université de Toulon, 83130 La Garde, France
2
COSMER—EA 7398, CNRS, Université de Toulon, 83130 La Garde, France
3
SMIoT, Université de Toulon, 83130 La Garde, France
4
LIS—UMR 7020, CNRS, Université de Toulon, 83130 La Garde, France
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(9), 3137; https://doi.org/10.3390/app10093137
Received: 13 February 2020 / Revised: 20 April 2020 / Accepted: 22 April 2020 / Published: 30 April 2020
(This article belongs to the Special Issue Numerical and Analytical Methods in Electromagnetics)
Reluctance coil guns are electromagnetic launchers having a good ratio of energy transmitted to actuator volume, making them a good choice for propelling objects with a limited actuator space. In this paper, we focus on an application, which is launching real size soccer balls with a size constrained robot. As the size of the actuator cannot be increased, kicking strength can only be improved by enhancing electrical to mechanical energy conversion, compared to existing systems. For this, we propose to modify its inner structure, splitting the coil and the energy storage capacitor into several ones, and triggering the coils successively for propagating the magnetic force in order to improve efficiency. This article first presents a model of reluctance electromagnetic coil guns using a coupled electromagnetic, electrical and mechanical models. Four different coil gun structures are then simulated, concluding that splitting the kicking coil into two half size ones is the best trade-off for optimizing energy transfer, while maintaining an acceptable system complexity and controllability. This optimization results in robust enhancement and leads to an increase by 104 % of the energy conversion compared to a reference launcher used. This result has been validated experimentally on our RoboCup robots. This paper also proves that splitting the coil into a higher number of coils is not an interesting trade-off. Beyond results on the chosen case study, this paper presents an optimization technique based on mixed mechanic, electric and electromagnetic modelling that can be applied to any reluctance coil gun. View Full-Text
Keywords: coil gun; reluctance; electromagnetic launcher; mechatronics; electronics; mechanics; simulation; RoboCup coil gun; reluctance; electromagnetic launcher; mechatronics; electronics; mechanics; simulation; RoboCup
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MDPI and ACS Style

Gies, V.; Soriano, T.; Marzetti, S.; Barchasz, V.; Barthelemy, H.; Glotin, H.; Hugel, V. Optimisation of Energy Transfer in Reluctance Coil Guns: Application to Soccer Ball Launchers. Appl. Sci. 2020, 10, 3137. https://doi.org/10.3390/app10093137

AMA Style

Gies V, Soriano T, Marzetti S, Barchasz V, Barthelemy H, Glotin H, Hugel V. Optimisation of Energy Transfer in Reluctance Coil Guns: Application to Soccer Ball Launchers. Applied Sciences. 2020; 10(9):3137. https://doi.org/10.3390/app10093137

Chicago/Turabian Style

Gies, Valentin; Soriano, Thierry; Marzetti, Sebastian; Barchasz, Valentin; Barthelemy, Herve; Glotin, Herve; Hugel, Vincent. 2020. "Optimisation of Energy Transfer in Reluctance Coil Guns: Application to Soccer Ball Launchers" Appl. Sci. 10, no. 9: 3137. https://doi.org/10.3390/app10093137

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