A5055998289- Particle accelerators and beam dynamics
- Magnetic confinement fusion research
- Advanced DC-DC Converters
- Superconducting Materials and Applications
- Multilevel Inverters and Converters
- Advanced Power Amplifier Design
- Wireless Power Transfer Systems
- Radio Frequency Integrated Circuit Design
- Gyrotron and Vacuum Electronics Research
- Smart Grid Security and Resilience
- Silicon Carbide Semiconductor Technologies
- Plasma Diagnostics and Applications
Institute for Plasma Research
2017-2023
Integrated Test Range
2017
The ITER Ion Cyclotron Heating and Current Drive system (IC H&CD) is designed to deliver 20MW a broad range of plasma scenarios between 40 55MHz, during very long pulses. It consists two broadband equatorial port plug antennas, their pre-matching matching systems, transmission lines, Radio Frequency (RF) Sources High Voltage Power Supplies. overall project schedule has been revised agreed by Council; it re-integrates the second antenna its power supplies in construction baseline sets dates...
As part of development program for a high power co-axial transmission line component test facility, an existing traveling wave resonator based stand is modified to improve gain and ring return loss. The 10 dB directional coupler in the earlier replaced with 14 couple radio frequency ring. To achieve improved isolation loss, design equipped two broadside strip-lines tunable gap between them. Detailed optimization without setup performed using simulator Computer Simulation Technology Microwave...
This paper includes a detailed study of Zero Voltage Switching resonant converter based buck converter, understanding with the help mathematical equations for various modes and simulation DC Power source at different voltages current level. As in conventional pulse width modulated (PWM) power converters, switches have to cut off load within turn-on turn-off times under hard switching conditions. The concept is incorporate tanks converters create oscillatory (usually sinusoidal) voltage...
ITER-India is responsible to deliver nine (8+1 spare) ICH & CD Power Sources ITER. Each power source capable 2.5 MW at 35 65 MHz frequency range with a load condition up VSWR 2:1. For remote operation of different subsystems, Local Control Unit (LCU) developed. LCU developed using PXI hardware and Schneider PLC Lab VIEW-RT developmental environment. All the protection function amplifier running on 7841 R module that ensures hard wired logic. There are three level function- first by supply...
Hysteresis feedback controlled synchronous buck converter-based power supply is designed and developed for biasing the transistors of Solid State RF Power Amplifier (SSPA). Design verification done using PSIM software. The requirement SSPA varies from a few watts to 12 kW depending on application. It requires have constant voltage variable current. A comparative study fixed frequency pulse width modulated (PWM) converters hysteresis control converter has been done. advantages challenges...
This article comprises a design, simulation, development, and testing of 500-V, 4-A dc power supply based on the zero voltage switching (ZVS) scheme. Resonant converters have many variants. In this article, quasi-resonant converter (QRC)-ZVS-half bridge-constant frequency type has been used which is generally employed for fixed load application, but in proposed novel tank circuit designed such way to keep ZVS instant intact even case variable conditions. Four modules resonant buck 125 V, 4 A...
The high-power radio frequency source for ion cyclotron heating and current drive of ITER tokamak consists two identical 1.5 MW amplifier chains. These chains will be combined using a wideband hybrid combiner with adequate coupling flatness, phase balance, return loss, isolation response to generate 2.5 (RF) power in the range 36 60 MHz. As part in-house development program at ITER-India, flatness loss/isolation better than 0.4 −25 dB, respectively, has been simulated. A detailed analysis...