Help with Mosfets for Coil Gun Building

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SUMMARY

The discussion focuses on the use of MOSFETs for firing coils in coil gun construction, highlighting a transition from SCRs due to operational issues. Key insights include the operational principles of n-channel and p-channel MOSFETs, where a positive gate-source voltage (Vgs) greater than the threshold voltage (Vth) is required for n-channel FETs, and a negative Vgs less than Vth for p-channel FETs. This foundational knowledge is crucial for effective coil gun design and operation.

PREREQUISITES
  • Understanding of MOSFET operation, specifically n-channel and p-channel types
  • Familiarity with gate-source voltage (Vgs) and threshold voltage (Vth)
  • Basic knowledge of coil gun mechanics and electrical circuits
  • Experience with electronic components and circuit design
NEXT STEPS
  • Research the differences between n-channel and p-channel MOSFETs in depth
  • Learn about gate driving techniques for MOSFETs in high-power applications
  • Explore coil gun design principles and electrical requirements
  • Study the impact of switching speeds on coil gun performance
USEFUL FOR

Electronics enthusiasts, coil gun builders, and engineers interested in high-power switching applications will benefit from this discussion.

SaraR
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I am trying to use mosfets to fire the coils on a coil gun I am building, I started with SCRs and have switched over due to problems. Does anyone know how they work it has been like 3 years since I took a class in analog and I can't remember for the life of me. Thanks for any help in advance.
 
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For n-channel FETs, you apply a positive Vgs > Vth to turn them on. For p-channel FETs, you apply a negative Vgs < Vth to turn them on.

- Warren
 

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