I am trying to design a low-pass filter for a 24V, DC, 10A power line to suppress EMI, RF interference and noise in a bus. There is no ground(chassis). I am trying to simulate this filter that was tried in the bus and worked (the audio amplifier was noise-free). This filter is the filter on my previous question.
I couldn't calculate the cutoff frequency because of the common-mode chokes. Could you help me calculate?
I am trying to simulate it, however it doesn't seem right. Am I simulating it right?
Here are the schematics and graphs from LTSpice: