A High Voltage and High Current SCR Commutation Circuit for Driving an Induction Coilgun

Ram, R and Joy Thomas, M (2021) A High Voltage and High Current SCR Commutation Circuit for Driving an Induction Coilgun. In: 2021 IEEE Pulsed Power Conference, PPC 2021, 12 - 16 December 2021, Denver.

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Abstract

The exit velocity of the projectile in an induction coilgun has been found to be lower than the theoretical maximum velocity that can be achieved after giving allowance for the effects due to drag etc. This has been attributed to the "armature capture effect,"which comes into play because of the current reversal happening in the projectile. In this paper it is shown that the reduction in the projectile velocity can be arrested if the coil current is commutated at the right time. An SCR-based switching circuit for the coil current has been implemented in the induction coilgun under development in the authors' laboratory. This paper describes the SCR commutation circuit topology to commutate the coil current for an induction coilgun operating at high voltage and high current and compares the results obtained with and without the current commutation. © 2021 IEEE.

Item Type:	Conference Proceedings
Publication:	IEEE International Pulsed Power Conference
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Timing circuits, reductions; Capture effect; Coil current; Coilguns; Commutation circuit; Current reversals; Exit velocity; High currents; High voltage current; Maximum velocity, Projectiles
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	19 May 2022 09:19
Last Modified:	19 May 2022 09:19
URI:	https://eprints.iisc.ac.in/id/eprint/71907

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