Buck converter with feedback

162

02:01:57

This is set up now to deliver 25 watts of power, from testing I know it can deliver over 50 watts, before the output voltage falls below 5 volts. Use the nor gate to see a marginally unstable response because it never settles on 5 volt out put. This is because it has a pwm signal that will turn it on even when it is at 5 volts.Use the inverter to see a stable response with some overshoot. With the inverter the steady state error is at zero because it finally settles to 5 volts.

If less overshoot is desired increase the delay on the inverter.

This is to show that more 'controls' aren't always needed.

published 8 years ago

hurz

8 years ago

But you haven't build that in reality, and you do not recommand to do, right?

justinmh

8 years ago

No, and no. I was just messing around. Plus this isn't really practical seeing as you need a separate power supply for the gates that can deliver 10 volts, and one for the op amp that can deliver 50 volts... so if you can get those you should be able to do a 5 volt power supply with out all this right? I was just using it to show how to control the voltage out, and simulate a marginally unstable response with steady state error, and a stable response with zero steady state error. But yes, don't build this, one of the many instances where it works when you simulate it, but shouldn't do it.

hurz

8 years ago

Yes, not even in simulation.

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