Reply To: Global Warming

[asymmetric_implosion]

The PF, when working properly, is a series RLC circuit. All components contribute to the R, L and C. The C is dominated by the capacitor so other capacitance can be neglected in most PF devices. There are a number of different R and L contributors to the system. A gas switch typically triggers the systems and it is a dynamic resistor and inductor. The resistance falls from >100MOhm to <0.01 Ohm in less than 50 ns. The inductance stabilizes based upon the switch geometry for the rest of the pulse. It is typically 50-100 nH. The feed plates contribute both R and L depending upon their geometry and conductor choice. The electrode region is most accurately modeling as a time varying and time varying R. There are a number of models that exist like the model by Sing Lee. I've posted the link to Lee's model a number of times on this forum. When I have the measured time derivative of the current and the voltage at the electrodes, I prefer to derive R and L as they vary with time. There are very complex numerical models that address the physics in detail but they are beyond the reach of the average person due to the processing power required to run them. Lee's model is probably the most accessable model for the average person (only need Excel) while maintaining some meaningful accuracy. Just a warning, garbage in and garbage out. You need to know a bit about PF devices before you just start throwing numbers in the model. It is not valid over a wide range of parameters.