rfguy wrote:I recently watched a very cool you tube video from Weber Sate University called a deep dive into chevy bolt drive unit. One of things I was curious about that was not covered is what happens in L range and R range. I have a theory that reverse is accomplished in the single power 3 phase inverter where any 2 phases are reversed via a contactor which would reverse motor rotation. I would like to know if this is true or not. Also I would like to know how L range increases the regenerative braking. In town we always drive in L range as the service brakes are not needed as long as the battery is not fully charged. Thanks for any comments.
The motor is 6 phase, and is computer controlled. The computer will energize phases, one at a time, to make the car move. If the computer energizes 1,2,3,4,5,6,1,2,3,4,5,6,... the car goes forwards. If the computer energizes 1,6,5,4,3,2,1,6,5,4,3,2,1,... the car goes backwards. If the phases are moving at the same speed as the car, there is no acceleration or braking. If the phases move slower, the motor brakes the car. "L range" is just a software command to the computer to tell it to work harder slowing the car.
#49 on the LEAF 100 mile club.
Most everything around here is wet during the rainy season. And the rainy season is long.
2012 Leaf SL Red
2014 Leaf SL Red
Can't sit in a Bolt seat, hoping for better soon.
Or perhaps a Buick version? Buick Electra 225???