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This paper presents the dual high frequency quasi-resonant single inverter circuit that can output the frequency of 100 kHz or more by Power Metal Oxide Semiconductor Field Effect Transistor (MOSFET) for induction heating. The induction heating is often used for the heat-treatment of a metal work-piece. In hardening of a gear, since the bottom or tips are heated at lower frequency fL or higher frequency...
A novel transcranial magnetic stimulation (TMS) device with controllable pulse width (PW) and near-rectangular pulse shape (cTMS) is described. The cTMS device uses an insulated gate bipolar transistor (IGBT) with appropriate snubbers to switch coil currents up to 6 kA, enabling PW control from 5 mus to over 100 mus. The near-rectangular induced electric field pulses use 2%-34% less energy and generate...
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