|
[DPRG] Re : Motor Filter Capacitors
Subject: [DPRG] Re : Motor Filter Capacitors
From: Subhobroto Sinha
subhobroto at gmail.com
Date: Sun Mar 25 20:20:17 CDT 2007
> > In the robot I am building for SMU, the servo controller crashes
> > whenever the motor has an instantaneous load (hard start, hits a bump,
> > etc). I don't have any sort of filter capacitor across the motor
> > leads. I have several to choose from, how can I determine what the
> > proper value is?
I have been facing this problem recently and am really interested in
what the final concrete solution might be.
My microcontroller resets everytime both of my motors (12VDC at 1A) start
simultaneously.
This process is repeatable.
If any one of the motors is disconnected, the microcontroller may or
may not reset.
This however does not occur when I power my robot with a beefy lab
regulated power supply but the above observations are guaranteed if I
am using a 400W ATX SMPS or 7805/7815 based PSU to power my bot.
> Ask yourself this question "What happens when the motor has an instantaneous
> load?"
The power supply sags momentarily ?
If so what are the solutions ? Optoisolation ?
No other way out ?
> Look at the whole problem and the solution will emerge.
It's all foggy in here :(
Regards
Subhobroto Sinha
http://www.subhobroto.co.nr
More information about the DPRG mailing list
|
