The 55v is the supply voltage PLUS any back emf the motor might generate. My little Pacsci motors at 40v and 3a in bipolar parallel run up to 1200rpm so i guess there's a bit of emf being produced.
YMMV but I'd say 52vdc is a bit much.
Also note that the draw requirements change rapidly and regulated supplies can cause issues. I've used linear with good result but had problems with a switcher. Depends how you can regulate it..
How's the weather down there? I just put my Brother on a plane for Adelaide.. |