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Old 04-29-2009, 10:47 AM   #1083 (permalink)
Roger Heuckeroth
EV Converter
 
Join Date: Mar 2009
Location: Saugerties, NY
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Quote:
Originally Posted by SteveU View Post
I’ll make one more suggestion: Ask your controller experts if rewiring the motor to bring out the field coil separately could be useful, both for improved speed and torque control, and for regenerative braking.

Way cool stuff guys,
Steve
Steve,

There is a whole other line of controllers that have this ability. They are called SepEx motors/controllers. Unfortunately, the motor and the controller go hand in hand. The field windings on these series motors are made up of a few turns of big wire. The field windings on the SepEx motors have many more turns of smaller wire. This allows the field winding current to be a fraction of the armature current. Its nice for regen, and also, you get more efficiency since you can limit your IR losses by holding current steady once you hit saturation.

Roger
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