Direct drive or transmission?
Posted: Fri Jan 13, 2012 11:28 am
Hi All,
Im known for asking silly questions so here go's
Just started TT conversion project and find I have a physical problem retaining the gearbox, (gearbox centre to driveshaft clearance for motor) but the car is all wheel drive, with rear wheels driven through a variable haldex unit and diff.
If I can lock up the haldex to give 100% drive Could I then connect motor direct to drive shaft and drive rear wheels? Then remove front wheel drive shafts.
I know the first problem is possibly not having the optimum drive ratio, that's why most conversions retain the gearbox.
Now this is where I need help, to overcome this problem is it possible to control a DC motor similar to star/delta control on AC industrial motors, so you have, effectively two modes low speed and high speed, maybe series and parallel?
Come on people we are talking EV we shouldn't need the gearbox
I originally planned using gearbox to motor set up and removing all the rear drive parts to reduce weight/friction etc but I would achieve the same by not using gearbox and front drive shafts.
My other option is to source the 2 wheel drive gearbox option for this car which has different clearances due to not having the rear drive interface.
Measure twice cut once.
Im known for asking silly questions so here go's
Just started TT conversion project and find I have a physical problem retaining the gearbox, (gearbox centre to driveshaft clearance for motor) but the car is all wheel drive, with rear wheels driven through a variable haldex unit and diff.
If I can lock up the haldex to give 100% drive Could I then connect motor direct to drive shaft and drive rear wheels? Then remove front wheel drive shafts.
I know the first problem is possibly not having the optimum drive ratio, that's why most conversions retain the gearbox.
Now this is where I need help, to overcome this problem is it possible to control a DC motor similar to star/delta control on AC industrial motors, so you have, effectively two modes low speed and high speed, maybe series and parallel?
Come on people we are talking EV we shouldn't need the gearbox
I originally planned using gearbox to motor set up and removing all the rear drive parts to reduce weight/friction etc but I would achieve the same by not using gearbox and front drive shafts.
My other option is to source the 2 wheel drive gearbox option for this car which has different clearances due to not having the rear drive interface.
Measure twice cut once.