ripples in output of car alternator regulator

[javadhz2000]

Hello friends,
I simulated a car regulator circuit using samples available on the internet.
Instead of using BJT transistors, I used MOSFET in the circuit.
Based on the coefficient of the rotor current, I placed a voltage source dependent on the current.
The simulation results were not good, and the output ripple was high (which I also observed in the real output).
In addition to the transistor base circuit, I also used a Schmitt trigger circuit to generate a PWM wave in the MOSFET gate, but it had no effect on the output.

[moffy]

To model an alternator, it is basically 3 phase output rectified by a 3 phase bridge (internally) whose amplitude is controlled by the field, it would also have a response time between a field change and the output changing. You might want to start with that.

[Kim Christensen]

Well, one thing that isn't realistic is D4... The car battery acts as a bit of the filter. If you want to simulate a battery, change D4 to a low value resistor to simulate the internal resistance of the battery.