Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: vidam on June 04, 2008, 01:10:08 PM

Title: Minimum current rating for motor driver
Post by: vidam 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?
Title: Re: Minimum current rating for motor driver
Post by: Rebelgium on June 04, 2008, 04:41:32 PM
minimum current limit? never heard of it...
Title: Re: Minimum current rating for motor driver
Post by: RobD 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. 

Title: Re: Minimum current rating for motor driver
Post by: benji 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