I have a 12v DC Motor connected to a 18.5v 3A Laptop power supply. When I connected the setup the motor is working but it is pulsing(Working with regular intervals of idleness). The problem is getting the motor to rotate continuously without pulses. If I shorted the connection for some time, It will work perfectly after that with no flaws. I’ve also tried a 40V Printer power supply(I don’t know the Amps). I tried connecting 4400μF capacitor(Rated for 50V) in parallel to the Motor but It didn’t show any change at all!
What am I doing wrong here? Any resources for further reference is very helpful.