View Single Post
Old 03-03-2009, 12:19 AM   #10 (permalink)
NiHaoMike
Master EcoModder
 
Join Date: Sep 2008
Location: Texas
Posts: 632
Thanks: 0
Thanked 26 Times in 24 Posts
Quote:
Originally Posted by Coyote X View Post
For regen, a DC motor is a generator so it puts out a voltage based on the shaft RPM so it needs a DC-DC converter and other junk to boost the voltage to something that can charge the pack and is generally not going to get you much extra power. AC motors are an alternator so you just adjust the field current to vary the voltage output so they can generate high voltages even at low RPM.
Actually, it is possible to use the motor windings as an inductor in a boost converter. That is true of both AC and DC motors.
http://techno-fandom.org/~hobbit/cars/boost-hack/
__________________
If America manages to eliminate obesity, we would save as much fuel as if every American were to stop driving for three days every year. To be slender like Tiffany Yep is to be a real hypermiler...

Allie Moore and I have a combined carbon footprint much smaller than that of one average American...
  Reply With Quote