30kw Hub motors for EV? - DIY Electric Car Forums
Go Back  

DIY Electric Car Forums > EV Conversions and Builds > EV Performance

Register Blogs FAQ Members List Social Groups Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
  #1  
Old 03-24-2010, 11:48 PM
Bowser330 Bowser330 is offline
Senior Member
 
Join Date: Jun 2008
Posts: 1,682
Bowser330 is on a distinguished road
Default 30kw Hub motors for EV?

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?
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 03-25-2010, 12:36 AM
RoughRider RoughRider is offline
Senior Member
 
Join Date: Aug 2008
Posts: 119
RoughRider is on a distinguished road
Default Re: 30kw Hub motors for EV?

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

No hubmotors get Eff over 90%...
Reply With Quote
  #3  
Old 03-25-2010, 01:09 AM
karlos karlos is offline
Senior Member
 
Join Date: Jun 2008
Location: Whangarei, New Zealand
Posts: 650
karlos is on a distinguished road
Default Re: 30kw Hub motors for EV?

Quote:
Originally Posted by Bowser330 View Post
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.
Reply With Quote
  #4  
Old 03-25-2010, 01:55 AM
RoughRider RoughRider is offline
Senior Member
 
Join Date: Aug 2008
Posts: 119
RoughRider is on a distinguished road
Default Re: 30kw Hub motors for EV?

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
Reply With Quote
  #5  
Old 03-25-2010, 06:08 AM
markcycle markcycle is offline
Member
 
Join Date: Nov 2008
Posts: 53
markcycle is on a distinguished road
Default Re: 30kw Hub motors for EV?

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
Reply With Quote
  #6  
Old 03-25-2010, 06:16 AM
markcycle markcycle is offline
Member
 
Join Date: Nov 2008
Posts: 53
markcycle is on a distinguished road
Default Re: 30kw Hub motors for EV?

Quote:
Originally Posted by RoughRider View Post
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
Reply With Quote
  #7  
Old 03-25-2010, 07:54 AM
PTCruisin PTCruisin is offline
Senior Member
 
Join Date: Nov 2009
Location: Southern Illinois
Posts: 132
PTCruisin is on a distinguished road
Default Re: 30kw Hub motors for EV?

Quote:
Originally Posted by markcycle View Post

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.
__________________
PTCruisin
http://www.evalbum.com/2946
Reply With Quote
  #8  
Old 03-25-2010, 08:25 AM
RoughRider RoughRider is offline
Senior Member
 
Join Date: Aug 2008
Posts: 119
RoughRider is on a distinguished road
Default Re: 30kw Hub motors for EV?

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?
Reply With Quote
  #9  
Old 03-25-2010, 09:52 AM
frodus's Avatar
frodus frodus is offline
Senior Member
 
Join Date: Apr 2008
Location: Portland, OR
Posts: 3,612
frodus will become famous soon enoughfrodus will become famous soon enough
Default Re: 30kw Hub motors for EV?

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.
__________________
Travis Gintz
Electro Motive Force, LLC.
Reply With Quote
  #10  
Old 03-25-2010, 10:08 AM
Bowser330 Bowser330 is offline
Senior Member
 
Join Date: Jun 2008
Posts: 1,682
Bowser330 is on a distinguished road
Default Re: 30kw Hub motors for EV?

Quote:
Originally Posted by karlos View Post
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?
Reply With Quote
Reply

Share or Bookmark this

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

 
Support DIY Electric Car
Sponsors

All times are GMT -6. The time now is 02:00 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.

Ad Management by RedTyger