1. Home
  2. Electronics Design
  3. Brushed Servo Motor Driver: 3A

Brushed Servo Motor Driver: 3A

I'm looking for a servo motor driver to drive a ~3A continous brushed DC motor. Voltage will most likely be 24-48. The motor driver has to accept a +/-10v input which I am told is a 'standard.' This input translates to likely motor velocity/current.

I'm using the Baldor NextMove ESB (which has 3 axis of servo motor control)

formatting link

to control a much larger servo controller (15A continous). In addition I have two other motors that I need drivers for.

Anyone have any suggestions? Baldors drivers for these smaller motors are a bit of an over kill. I need to find motor drivers that can handle this current range and accept this standard +/- 10v input.

Thank you.

Mike

Reply to
Mike
Loading thread data ...

I did an analog MDA for a film machine with brush 'pancake' motors. Normal forward run maybe 3-5 volts at 1A but during shuttle with a 2000 foot load it can hit 20 volts with momentary peaks of 35 amps (OK, it was a full speed forward to full reverse to see if it blows up. It doesn't). The amplifier itself looks VERY much like a big audio unit with 4 17 amp transistors in parallel on the + and - 35V rails. The main difference is the feedback comes from ground return resistor(s) of the motor rather than the output. Its just a big transconductance amp.

Setting the control range to +/- 10 V is one resistor value.

For efficiency, class-D amplifier would be a lot better but it really isn't a problem with analog in this machine.

Good luck on this. GG

Reply to
Glenn Gundlach

You could try:

formatting link
They make fairly robust DC motor controllers which easily handle your power requirement, though usually the control comes from a pot e.g. throttle grip, not a servo system. On some of their pages they refer to modifications for use in servos.

Chris

Reply to
Chris Jones

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.