Design and Development of Electromagnet Power Supply for Burst Mode Repetitive High Power Microwave Sources
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Abstract
Single frequency High-power microwave sources like Backward Wave Oscillator, Relativistic Magnetron etc., require a high magnetic field of about 1T to 4T for efficient operation. Single-shot HPM systems usually consist of pulsed magnetic systems. However, for repetitive HPM generation, a continuous magnetic field is required. To obtain a continuous high magnetic field in the required volume usually three solutions are worldwide preferred i.e., permanent magnet, DC electromagnet with cooling arrangements and superconductor-based magnetic coil. All these three systems are bulky, expensive and technologically demanding. In this paper, a novel power supply has been suggested that discharges a charged capacitor through a magnetic coil keeping the discharging current constant for a small period like hundreds of milliseconds to a second. An IGBT switch is used to discharge the capacitor1. The duty cycle of the IGBT switch is controlled using a current feedback signal from the hall sensor, thus keeping the current steady at a preset reference value. An experimental setup has been developed using a 300mF capacitor. A constant current up to 500A is achieved for 200mS. This system is scalable. For a longer duration of operation, more capacitor modules need to be added. Details of design, development and experimental results are presented in this paper.
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References
- Wang K, Lee FC, Hua G, Borojevic D. A comparative study of switching losses of IGBTs under hard-switching, zero-voltage-switching and zero-current-switching. Proceedings of 1994 Power Electronics Specialist Conference - PESC’94, Taipei, Taiwan; 1994. p. 1196-1204 https://doi.org/10.1109/PESC.1994.373834 PMid:7971660 DOI: https://doi.org/10.1109/PESC.1994.373834
- Das SC, Narayanan G, Tiwari A. Variation of IGBT switching energy loss with device current: An experimental investigation. IEEE 6th India International Conference on Power Electronics (IICPE), Kurukshetra, India; 2014. p. 1-5. https://doi.org/10.1109/IICPE.2014.7115863 DOI: https://doi.org/10.1109/IICPE.2014.7115863
- Rosseel K, et al. The pulsed-field facility at HFML, commissioning and first results. IEEE Transactions on Applied Superconductivity. 2006; 16(2):1664-7. https://doi.org/10.1109 /TASC.2005.864286 DOI: https://doi.org/10.1109/TASC.2005.864286
- Calico SE, Scott MC, Clark MC. Development of a compact Marx generator for High-power microwave applications. Digest of Technical Papers. 11th IEEE International Pulsed Power Conference; 1997.
- Chandra R, et al. A uniform, pulsed magnetic field coil for gigawatt operation of relativistic backward-wave oscillator. IEEE Transactions on Plasma Science. 2018; 46(8):2834-9. https://doi.org/10.1109/TPS.2018.2850353 DOI: https://doi.org/10.1109/TPS.2018.2850353