Hello! First off, sorry that my first post is a new thread, but I promise I have searched through the threads tagged with "flyback" and I have not been able to find anything relating to the problem with my project. So...
I am developing a capacitive discharge ignition system. I am looking for a total energy of ~60mJ (or more) per spark event. To achieve this, the 1uF capacitor needs to charge up to ~340V in 1mS. I have been looking at 1 square flyback transformers and I have SPICE modeled a circuit using the parameters of a Coilcraft transformer. I have a sample of the 20A version (GA3459-BL) and I have been trying to replicate the SPICE results with a real circuit.
My problem is that in the real circuit, something is limiting the output voltage to around 120V. It starts the capacitor charging process just like the simulation, but as it approaches 120V, it levels off.
I realize that there are many possible reasons for something like this to happen, and I have gone through several investigations, but now I am stumped. I will attach a document that explains the situation in more detail as well as the tests I have already run and the results.
Any input is greatly appreciated.
Thanks!
I am developing a capacitive discharge ignition system. I am looking for a total energy of ~60mJ (or more) per spark event. To achieve this, the 1uF capacitor needs to charge up to ~340V in 1mS. I have been looking at 1 square flyback transformers and I have SPICE modeled a circuit using the parameters of a Coilcraft transformer. I have a sample of the 20A version (GA3459-BL) and I have been trying to replicate the SPICE results with a real circuit.
My problem is that in the real circuit, something is limiting the output voltage to around 120V. It starts the capacitor charging process just like the simulation, but as it approaches 120V, it levels off.
I realize that there are many possible reasons for something like this to happen, and I have gone through several investigations, but now I am stumped. I will attach a document that explains the situation in more detail as well as the tests I have already run and the results.
Any input is greatly appreciated.
Thanks!
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