> Are you saying it could be worn brushes? Not really. I don't really know what I'm talking about, just dredging up bits and pieces from power lab 25 years ago. Motors can be wound in a wide variety of ways, and a starter motor is a candidate for a series winding architecture. All the current goes through both the field and the armature then, through the brushes. But if the armature's field (as opposed to the field's field? shall we switch to rotor and stator for terms?) is weak it won't provide back-EMF to tone down the stator current, nor will it provide torque.
DC motors have the interesting characteristic that if you turn off the rotor current the motor overspeeds to destruction as the rotor field decays. _That_ was drummed into our heads by the lab instructor, who naturally didn't want to see that happen to our test sets. > Or does the field winding spin on these things? No, I'm talking about the stationary part. -- Jim _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
