Design and Development of High Current Pulse Shaping Inductor Based on Bitter Magnet Configuration for Electro Magnetic Launcher
Pradeep Kumar1, Kishore Jadhav2, Gaurav Kumar3, KJ Daniel4, Suwarna Datar5

1Pradeep Kumar*, Armament R&D Establishment (DRDO),Pashan Pune, India.
2Kishore Jadhav, Armament R&D Establishment (DRDO),Pashan Pune, India.
3Gaurav Kumar, Armament R&D Establishment (DRDO), Pashan Pune, India. KJ Daniel, Armament R&D Establishment (DRDO),Pashan Pune, India.
4Suwarna Datar, Dept.of Applied Physics, Defence Institute of Advanced Technology, Pune, India.
Manuscript received on July 20, 2019. | Revised Manuscript received on August 10, 2019. | Manuscript published on August 30, 2019. | PP: 4452-4458 | Volume-8 Issue-6, August 2019. | Retrieval Number: F8977088619/2019©BEIESP | DOI: 10.35940/ijeat.F8977.088619
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Abstract: A unique pulse shaping inductor was designed and developed using a modified Bitter magnet configuration, to operate at peak current of 150 kA for duration of 5-10 ms in a Pulse Forming Network (PFN). The inductor was designed with a stack of parallel copper plates in the form of circular discs with a central hole, with GRP insulation plates in between. The design is optimized by electromagnetic finite element techniques for inductance and structural stability. The conducting discs and insulators are clamped together with tie rods between two endplates to provide adequate contact pressure and sufficient mechanical support. The conducting, inter connecting and insulating components were modeled and optimised parametrically for the desired performance and structural integrity. The device was fabricated, assembled and tested with 24 bitter plates for 28 μH inductance. The inductor was integrated with 400 kJ capacitor bank module and tested under static and dynamic condition. Current pulse of peak above 100 kA was generated, with consistent arc-free performance, high reliability and structural stability.
Keywords: Bitter Coil, Pulse Inductor, Electromagnetic launch, Railgun, Pulsed Power.