FPGA Based Control and Protection Unit of a Multichannel Pulsed Power Supply for Solid State RF Amplifiers

Akhilesh Tripathi*, Amrita Singh **, Sachin Rathi ***, Rinki Upadhyay ****, M. K. Badapanda *****, Mahendra Lad******
*,***-***** RF Systems Division, Raja Ramanna Centre for Advanced Technology, Indore, India.
** Banasthali Vidyapith, Tonk, Rajasthan, India.
Periodicity:April - June'2020
DOI : https://doi.org/10.26634/jee.13.4.17638

Abstract

This article presents an FPGA based control and protection unit employing Xilinx make Spartan-6 XC6SLX9TQG144C FPGA for driving a multichannel pulsed power supply of pulsed solid state RF amplifiers. The control unit generates synchronized drive pulses for driving 24 units of 50 V, 80 A pulsed output channels of the multichannel pulsed power supply. The pulse width and frequency of drive pulses are settable from 100 μs to 2.5 ms and from 1 Hz to 50 Hz respectively. Over-current protection of output channels is implemented through its protection unit. The FPGA has been programmed in VHDL for pulse generation, control of pulse parameters and over current protection of pulsed output channels. The schematics, simulation results and RTL schemes are presented in this paper. This control and protection unit is integrated with 24 numbers of 50 V, 80 A pulsed output channels which are simultaneously tested up to 80 A peak current and experimental results are also presented in this paper. The rise time and fall time of output pulse are observed as < 20 μs and voltage droop is observed as < 0.5%. Typical jitter among output pulses of different pulsed output channels is observed as 60 ns.

Keywords

Pulsed Power Supply, Solid State RF Amplifiers, FPGA, VHDL Program, Signal Processing.

How to Cite this Article?

Tripathi, A., Singh, A., Rathi, S., Upadhyay, R., Badapanda, M. K., and Lad, M. (2020). FPGA Based Control and Protection Unit of a Multichannel Pulsed Power Supply for Solid State RF Amplifiers. i-manager's Journal on Electrical Engineering, 13(4), 49-60. https://doi.org/10.26634/jee.13.4.17638

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