The rating of the modules is essentially driven by the maximum power handling capacity of the MOSFETs and ferrites in the combiner circuit. Subsequently solution with class-D H-Bridge configuration have been evaluated through simulation where module design is stable as switching device do not participate in resonance, further switching device voltage rating is substantially reduced. The prototype uses two low power modules and a ferrite combiner to add the voltage and power at the output. The prototype design is attempted with Class-E amplifier topology where a MOSFET is switched resonantly. A conceptual design for a 200kW, 1MHz power supply and a prototype design for a 600W source been done. In terms of Power Electronics, thermal and power coupling issues are major challenges at such a high frequency. Switching converter based topology used to generate 1MHz sinusoidal output is expected to have advantages on efficiency and reliability as compared to traditional RF Tetrode tubes based oscillators. The Ion Source for a Neutral beam Injector at ITER-India uses inductively coupled power source at High Frequency (~1MHz). A High Voltage High Frequency (HVHF) Power supply is used for various applications, like AM Transmitters, metallurgical applications, Wireless Power Transfer, RF Ion Sources, etc.
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