On the right side. The puls generator, resistor 100, and rectifier, are the motor EMF pulse sub-circuit. And the main-circuit eliminate the positive pulses against the power supply on the left side of the schematic. So the 12volt line is almost clean, with variable load. Play with the values.
I used this schematic with a motor controller system, 24volt and 2 motors of each 150Watt.
I used also a large capacitor of 4700uF at the output, and a fuse, but it is ignored here.
