[Bowser330]

http://www.ev-propulsion.com/motorcycle-hub-motors.html

Each motor is 10kw cont. and 30kw peak...

Could these be retrofitted into a car rim? could they be paired? side-by-side to create 60kw car wheels?

Generally speaking 15-20kw should be enough to cruise at freeway speeds (70mph)

Imagine 2 in each wheel, 8 motors, 240kw peak, AWD and AWD-regen braking, more room for batteries, 1300each = 10K$ price tag for motors alone...

What do you think of this setup? A bit over the top eh?

8 motors = $10,400 (4 motor pairs, 1 pair for each wheel)
8 controllers = $8,000 (I am not sure if this could be simplified)
37 400AH TS cells = $16,300 (48kwh, if 15kwh = 70mph, then 100%DoD = 224miles, pack weighs 1000lbs)
BMS = 2,300 (not sure but seems reasonable)

Total $37,000 (w/o donor)

your thoughts, comments, suggestions, ideas?

[RoughRider]

this motors DONT have a Eff of 92%...NO WAY

No hubmotors get Eff over 90%...

[karlos]

Originally Posted by Bowser330

http://www.ev-propulsion.com/motorcycle-hub-motors.html

Each motor is 10kw cont. and 30kw peak...

Could these be retrofitted into a car rim? could they be paired? side-by-side to create 60kw car wheels?

Generally speaking 15-20kw should be enough to cruise at freeway speeds (70mph)

Imagine 2 in each wheel, 8 motors, 240kw peak, AWD and AWD-regen braking, more room for batteries, 1300each = 10K$ price tag for motors alone...

What do you think of this setup? A bit over the top eh?

8 motors = $10,400 (4 motor pairs, 1 pair for each wheel)
8 controllers = $8,000 (I am not sure if this could be simplified)
37 400AH TS cells = $16,300 (48kwh, if 15kwh = 70mph, then 100%DoD = 224miles, pack weighs 1000lbs)
BMS = 2,300 (not sure but seems reasonable)

Total $37,000 (w/o donor)

your thoughts, comments, suggestions, ideas?

I really liked the idea of doing the same thing but using them inboard, for example close to where the diff would be. It all looked good but the rpms when used with the Kelly controller, if I remember correctly where about 1500 so if you do your maths, it did not make for a great top speed.

[RoughRider]

dont forget, that each motor needs its own controller...

if you want to go with 8x motors...you will need 8x controllers#

one motor is around 22-25kg...your system is getting heavy

[markcycle]

The motor is designed for motorcycles as stated on the web site and is 10KW continous not 30 KW
Also the motor is 90 plus eff at 75% of max speed. Huge amount of work was done to minimize eddy currents at speed to improve eff. This is a custom design that cost EnerTrac a huge amount of money to develop.

EnerTrac Corp. has several test motorcycles all are welcome to test ride and judge the performance and range for oneself.
We are located in Farmingdale, NY

EnerTrac and EV propulsion are working on a electric differential version of the motor for small cars. We'll have something to show in a few weeks.

Anyway please don't bad mouth a product for a application its not intended for. When we come out with the car version it will be with a working car, then you can judge if the product meets your needs. We are also working on a controller to match to the motor for a greatly reduced cost compared with what is now available

http://www.doingitall.net/EnerTrac



Mark

[markcycle]

Originally Posted by RoughRider

dont forget, that each motor needs its own controller...

if you want to go with 8x motors...you will need 8x controllers#

one motor is around 22-25kg...your system is getting heavy

Not true if the motor are mechanically locked and synced together.

You would need one controller per wheel

Mark

[PTCruisin]

Originally Posted by markcycle

EnerTrac and EV propulsion are working on a electric differential version of the motor for small cars. We'll have something to show in a few weeks.


Mark

This could be a game changer.

[RoughRider]

hey mark, i dont want to talk bad about your motor...
i can not belive Eff 90% plus for a hub motor...
a hubmotor turns slow and in low rpms the Effs is low...

i think you dont have any graphs that show the Eff of your motor according to rpm?

[frodus]

He didn't say it was constant efficiency. All motors have an efficiency curve and most that I've seen are more efficient at higher RPM's. This is PEAK efficiency we're talking about.

[Bowser330]

Originally Posted by karlos

I really liked the idea of doing the same thing but using them inboard, for example close to where the diff would be. It all looked good but the rpms when used with the Kelly controller, if I remember correctly where about 1500 so if you do your maths, it did not make for a great top speed.

Really? I thought 1500rpm with a 25" tire was over 100mph? How much faster do you need to go?