![]() ![]() ![]() One in the collector circuit to power the secondary and one in the base circuit for the oscillator. Every CDI circuit I have seen uses two primary coils. If your circuit doesn't work, then it is an unanswerable question. (I've only taken EM aka Physics 2 so RLC, LC circuit type stuff I am somewhat familiar with, but basically treat me like I know nothing since it makes things easier for me).Ī big help would be to explain to me how to read an analog circuit and step through everything that occurs as the switch is switched on and then off for the circuits since my EE friends and the people I talked to gave me some very different interpretations.Ĭlick to expand.Does your circuit work with C1? If so, then test it without the capacitor. If anyone can help clarify anything about this I'd be grateful. (Don't want to hurt the battery or wind 5K+ windings by hand just to have the wire burn). Ideally I want to find all of the math behind the ignition coil and be able to mathematically prove that it works before I build it. I assume this can be worked out by picking a set number of turns and then calculating the values. The number of turns is based on the the peak voltage which in turn seems to be based on the number of turns which causes a recursive problem. Once I find the peak voltage output though I want to find the number of turns on each coil in order to step the voltage up to a large value. ![]() I also have this equation from Wikipedia for finding the voltage over time which is less obvious how I'd use it. I know the AL value and I'll have a certain number of turns on the primary coil presumably. So in order to calculate that I found the meaning behind AL here which has it as L = n^2 * AL, where L is the inductance, n is the number of turns and AL is stated as "The relationship between the inductance with a given core and the number of turns on it is called its AL value." I've been told the voltage in the primary inductor (in the magnetic field I think?) will be much higher than 9V. When the switch is turned on the primary coil gains a magnetic field and then when it turns off the primary coil oscillates with the capacitor or is it designed to protect the switch so that a spark doesn't jump across it? I'm confused about that part.Īfter analyzing that I'm wondering something else about the ignition coil. ![]() It connects the secondary coil with the primary coil which I noticed a lot of ignition coil circuits do. ![]()
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