go_away

Author Topic: Minimum current rating for motor driver  (Read 1443 times)

0 Members and 1 Guest are viewing this topic.

Offline vidamTopic starter

  • Supreme Robot
  • *****
  • Posts: 423
  • Helpful? 1
  • Robotronics.org
Minimum current rating for motor driver
« on: June 04, 2008, 01:10:08 PM »
if a motor driver has a minimum current limit of 10 Amps does that mean it won't drive a motor with < 10 Amps?

Offline Rebelgium

  • Supreme Robot
  • *****
  • Posts: 638
  • Helpful? 0
  • It's called the future ... We like it here
Re: Minimum current rating for motor driver
« Reply #1 on: June 04, 2008, 04:41:32 PM »
minimum current limit? never heard of it...
To relax after some hard work on robotics: A very fun free online text based MMORPG
orgcrime.net

Offline RobD

  • Full Member
  • ***
  • Posts: 64
  • Helpful? 0
Re: Minimum current rating for motor driver
« Reply #2 on: June 05, 2008, 05:15:00 PM »
Some devices, like switch mode power supplies, require a minimum load across the output.  If the minimum load is not met the internal components tend to fry.  Try running a small current consuming device on an old computer power supply and it will eventually die.

I've never seen a driver board for >10A motors, but if one was designed to operate at a minimum of 10A I would suspect the designers added that requirement for a reason.  I'm sure it would work....for a little while. 


Offline benji

  • Supreme Robot
  • *****
  • Posts: 832
  • Helpful? 0
Re: Minimum current rating for motor driver
« Reply #3 on: June 06, 2008, 03:55:47 AM »
Quote
Some devices, like switch mode power supplies, require a minimum load across the output
this is the same as maximum current  ;) you can calculate it easily
good ol' BeNNy

 


Get Your Ad Here

data_list