View Single Post
Old 12-04-2012, 02:53 PM   #55 (permalink)
EcoModding Lurker
Join Date: Jun 2012
Location: Davis
Posts: 8
Thanks: 0
Thanked 3 Times in 2 Posts
Originally Posted by Daox View Post
If you spin a series wound motor it doens't generate any power (and thus no drag) until you power the field windings and connect the armature wiring to a load. All you have is bearing and brush drag, and some windage lossses which is all pretty minimal.
True. You can see what that is pretty easily by putting a wheel or crank on the shaft and spinning it. If it goes easily, drag will be relatively low.
  Reply With Quote