AI Article Synopsis
- A thyristor stack designed for pulsed inductive plasma generation features a diode assembly for current reversal and utilizes a self-supplied gate driver for efficient triggering.
- The stack operates in a series resonant circuit at 30 kHz, achieving a 120-microsecond pulse duration and a pulse energy of 50 J, with a peak power efficiency of 84% and 480 kW output.
- System tests demonstrated operation with an inductive load and plasma, resulting in voltage levels of 4.1 kV, peak currents of 5 kA, and a switching rate of 1 kA/microsecond.
Article Abstract
A thyristor stack for pulsed inductive plasma generation has been developed and tested. The stack design includes a free wheeling diode assembly for current reversal. Triggering of the device is achieved by a high side biased, self supplied gate driver unit using gating energy derived from a local snubber network. The structure guarantees a hard firing gate pulse for the required high dI/dt application. A single fiber optic command is needed to achieve a simultaneous turn on of the thyristors. The stack assembly is used for switching a series resonant circuit with a ringing frequency of 30 kHz. In the prototype pulsed power system described here an inductive discharge has been generated with a pulse duration of 120 micros and a pulse energy of 50 J. A maximum power transfer efficiency of 84% and a peak power of 480 kW inside the discharge were achieved. System tests were performed with a purely inductive load and an inductively generated plasma acting as a load through transformer action at a voltage level of 4.1 kV, a peak current of 5 kA, and a current switching rate of 1 kA/micros.
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Article Synopsis
- A thyristor stack designed for pulsed inductive plasma generation features a diode assembly for current reversal and utilizes a self-supplied gate driver for efficient triggering.
- The stack operates in a series resonant circuit at 30 kHz, achieving a 120-microsecond pulse duration and a pulse energy of 50 J, with a peak power efficiency of 84% and 480 kW output.
- System tests demonstrated operation with an inductive load and plasma, resulting in voltage levels of 4.1 kV, peak currents of 5 kA, and a switching rate of 1 kA/microsecond.
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