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Pulse Power Applications

Pulse Power Applications. John Russo Jr., St. Vincent of Pallotti High School Mentored by: Heather O’Brien, and Dr. Marc Litz, Adelphi, ARL, MD. Outline. Summary Silicon carbide (SiC) super-gate turn-off thyristors (SGTO) PSpice Solid Works Experiment Results Conclusion. Summary.

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Pulse Power Applications

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  1. Pulse Power Applications John Russo Jr., St. Vincent of Pallotti High School Mentored by: Heather O’Brien, and Dr. Marc Litz, Adelphi, ARL, MD

  2. Outline • Summary • Silicon carbide (SiC) super-gate turn-off thyristors (SGTO) • PSpice • Solid Works • Experiment • Results • Conclusion

  3. Summary E.M. armor and E.M. guns will help vehicles in the future to be lighter, more mobile, faster, and safer. • Applications in E.M. armor and E.M. guns require high current switches. • SiC SGTO solid-state switches evaluated in a transmission line. • Further evaluation to increase current limits of the switch using higher current transmission lines will be pursued. Shielded Faraday cage used for high voltage and high current circuit testing.

  4. Silicon carbide (SiC) super-gate turn-off thyristors (SGTO) • Devices total area is 0.16cm2. • When switch is fully insulated, it can be charged at 3000 V (blocking). • Higher heat tolerance and dissipation. • Potential for much higher pulsed current. • Results to-date show SiC devices switch 350 A at 620 V for at least 1 mSec without damage. Silicon carbide (SiC) super-gate turn-off thyristors (SGTO)

  5. PSpice • The PSpice simulation was compared to the transmission line. • Results were very similar. • Used built-in models for the components of the circuit. PSpice Transmission line model Initial Diode Diodes added later GroundSource Power source capacitors inductor SGTO Resistor

  6. Solid Works SGTO • Took dimensions and measurements of each part of the circuit. • The assembly of the parts was similar to the real circuit. • Sent the Assembly to Paint to draw the wires. • Checked Solid Works drawing matches real circuit. These are designs from Solid Works. Transmission line model Capacitor drawing

  7. oscilloscope Experiment • Built the test bed circuit using the basic components of an electrical circuit. • Put the components together on the platform and assembled them in their stationary positions. • Hooked up all of the probes to the circuit, which connected to the oscilloscope. This is high voltage power supply. This is where the switch went in the test bed. The circuit experiment showing capacitors inductors, and other interconnections

  8. Results • Took many shots from the power source and the highest was around 620 V charged and switched at 350 A. • The silicon carbide switch died after another shot. • The other 2 diodes were killed before the switch died. This is data recorded from the oscilloscope and put in an Excel program. This is a graph created from the PSpice simulated circuit and it compares very well with the transmission line.

  9. Conclusion • Measured results compare well with PSpice simulations. • The solid-state switch sustained 100’s of shots at low voltage without weakening. • Switch failure because of over voltage of diodes. silicon carbide (SiC) super-gate turn-off thyristors (SGTO) This device is what it looks like before we started doing tests on the switch. These are before and after pictures of the switches.

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