PSU Votlage

A motor will only go as fast as you have volts to apply (with no loading taken into consideration), so whilst you can run a DC motor and its drive at below its rated voltaged, the maximum speed possible will reduce.  This can usually be calculated from a motors RPM/V specification and this will typically be specified with no load on the motor.  Many motor drives will have a a voltage drop across them, maybe as much as 5%, reducing the voltage the motor itself finally gets.

1 vs 4 Quadrant Drives

A 1 quadrant drive can't decelerate quickly and handle regenerative loads (when the motor is being pushed by the load). If your application is on a cam or such like loading then you will often need a 4 quadrant drive which will control regenerative loads better.

 

USEFUL?
We benefit hugely from resources on the web so we decided we should try and give back some of our knowledge and resources to the community by opening up many of our company’s internal notes and libraries through mini sites like this. We hope you find the site helpful.
Please feel free to comment if you can add help to this page or point out issues and solutions you have found, but please note that we do not provide support on this site. If you need help with a problem please use one of the many online forums.