9 VOLTS OF PAIN!(MARX GENERATOR)AlvinTungCeasar Hurtado
What is a Marx Generator? Voltage Multiplier Cockroft-Walton generator-ConstantVDC Stage Multiplier High PulseVoltageRelevant Equations:V(out) = n(Vin)Where n is the number ofstages
Applications Ignitions HighVoltage InsulationTest Large Scale Generatorsare used in theAerospace Industry toexamine whatLightning pulses do toouter skin of Jet Aircraftand Passenger Planes. Building somethingdangerous due tooverall boredom.
Supplies-1 Ballast Resister (pulsetimer) = 6.8MΩ (2 Watt)-30 1MΩ (0.5Watt)Resistors-16 1nF (3,000 volt)Capacitors-1 $7 Electric FlyswatterfromWalmart (2.75kV)-1 9V DC Battery (Duracellis a good brand)-Alligator Clips-Patience
Problems We had trouble withfinding an appropriatehigh-voltage powersupply There was a pointwhere only about halfthe stages would spark
Solutions Instead of attempting the highvoltage transformer, we used ahigh voltage, low currenttransformer from a fly swatter When we couldn’t get sparksall throughout the generator,we tried tweaking the sparkgaps, replacing components,etc. Replacing the battery did thetrick!
Expectations We wanted a 1 cm spark (roughly 30 kV) We wanted our experimental value to beconsistent with the theoretical value We wanted all spark gaps in every stage tolight up
Results Our transformer output was measured at 1,780V At 16 stages, we achieved 1 cm of sparks 16 stages X 1,780V = 28,480V The experimental result was well withintheoretical bounds (30,000V)