Quote:
Originally Posted by luka
I completely forgot about the inductance in the motors (which affects the rate of change of current in the coils). It is all clear now.
This is actually a quite interesting, although probably not the way to go due to a large power waste which will kill my batteries in no time.
Thank you and enjoy your dinner  |
Heh, sorry, didn't refresh before posting.
Yeah there is a lot of wasted energy.
I've heard of people running stepper motors up around 100v
Thats some serious power loss, fortunatelly there are some great stepper drivers around these days... chopper drives eliminate a lot of the waste heat through the series resistor by eliminating it altogether.
They supply the full voltage across the motor coil, 48v or whatever you desire, and then use pulse width modulation to limit the current flow.