Hi - Here's a quote from a leading manufacturer of stepper motor (chopper) drives.
I recently advised someone who was using a switching supply and who was experiencing much lower than expected (low speed) torque that they might consider following the above advice to see if it improved things.
The response was to the effect of "never add a capacitor to the output of a switching supply - it will seriously screw with the supply's internal electronics".
So now I'm confused. Tried searching for advice/examples/papers on supply design etc. but to no avail for this particular question. Can anyone shed any light on the pros and cons please?
Thanks
I always use unregulated supplies for driving steppers and have never had a problem but I know others choose to use switching supplies.The drive works best with unregulated power supplies though regulated linear and switching power supplies may also be used. What matters is the power supply must have a large output capacitor and an unregulated supply intrinsically has one... ...A 2000 to 10000uF capacitor should do.
I recently advised someone who was using a switching supply and who was experiencing much lower than expected (low speed) torque that they might consider following the above advice to see if it improved things.
The response was to the effect of "never add a capacitor to the output of a switching supply - it will seriously screw with the supply's internal electronics".
So now I'm confused. Tried searching for advice/examples/papers on supply design etc. but to no avail for this particular question. Can anyone shed any light on the pros and cons please?
Thanks