www.recumbents.com - Carbon fiber electric assist midracer
www.recumbents.com
www.recumbents.com
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password
 All Forums
 www.recumbents.com
 Electric Recumbents
 Carbon fiber electric assist midracer
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

estoudz
Starting Member

USA
22 Posts

Posted - 07/26/2018 :  23:38:25  Show Profile  Reply with Quote
My build in progress of a carbon fiber electric assist midracer.







eric stoudemire

warren
human power expert

USA
6444 Posts

Posted - 07/27/2018 :  08:11:25  Show Profile  Visit warren's Homepage  Reply with Quote
Wow, cool! Is that a motor with a 90 degree bevel gear hanging out the back there? Batteries in that large bottom tube?
Go to Top of Page

estoudz
Starting Member

USA
22 Posts

Posted - 07/27/2018 :  12:05:58  Show Profile  Reply with Quote
Yes, the 3000 watt motor drives a mitrpak right angle helical gearbox. The gearbox drives a six to one reduction using 219 go cart sprockets. The front wheel uses a shimano alfine eight speed hub. The controller and 72v 20amp/hr. LiPO battery pack are housed in the bottom tube. I might have to use liquid cooling for the motor and the controller and the batteries. Top speed should be close to 50mph!!!

eric stoudemire

Edited by - estoudz on 07/27/2018 12:39:59
Go to Top of Page

estoudz
Starting Member

USA
22 Posts

Posted - 07/27/2018 :  12:40:05  Show Profile  Reply with Quote
Yes, the 3000 watt motor drives a mitrpak right angle helical gearbox. The controller and 72v 2020amp/hr. LiPO battery pack are housed in the bottom tube. I might have to use liquid cooling for the motor and the batteries.

eric stoudemire
Go to Top of Page

estoudz
Starting Member

USA
22 Posts

Posted - 09/15/2018 :  21:09:08  Show Profile  Reply with Quote
I have started building my battery pack. It consist of 32 SPIM08HP cells arranged in a 16S2P array. These cells are rated at 8A/HR. and 200A peak discharge current! I had to reduce my battery voltage down to 60v due to space limitations in my bottom tube. The battery will be protected by a 60v 45A BMS. I have also built a range extender alternator from a one HP four stroke weed eater engine and a 510 watt (170vdc at 3A) permanent magnet alternator(repurposed brushless dc motor). The alternator powers a 66vdc power supply that recharges my battery pack. The power supply can also run on 115vac wall current.

https://image.ibb.co/jTV8xK/IMG_0948.jpg
https://image.ibb.co/gdsABe/IMG_0947.jpg



eric stoudemire
Go to Top of Page

estoudz
Starting Member

USA
22 Posts

Posted - 09/15/2018 :  21:15:53  Show Profile  Reply with Quote
I have started building my battery pack. It consist of 32 SPIM08HP cells arranged in a 16S2P array. These cells are rated at 8A/HR. and 200A peak discharge current! I had to reduce my battery voltage down to 60v due to space limitations in my bottom tube. The battery will be protected by a 60v 45A BMS. I have also built a range extender alternator from a one HP four stroke weed eater engine and a 510 watt (170vdc at 3A) permanent magnet alternator(repurposed brushless dc motor). The alternator powers a 66vdc power supply that recharges my battery pack. The power supply can also run on 115vac wall current.

https://image.ibb.co/jTV8xK/IMG_0948.jpg
https://image.ibb.co/gdsABe/IMG_0947.jpg



eric stoudemire
Go to Top of Page

estoudz
Starting Member

USA
22 Posts

Posted - 09/20/2018 :  14:40:07  Show Profile  Reply with Quote
I received my linear servo today for my home made electronic shifter for my shimano alfine hub. The servo will be driven by a servo controller that receives information from a microcontroller. I just have to figure how to connect the servo to the bell crank housing of the alfine hub. My 400 watt power supply came today and despite the 40% conversion losses from mechanical energy to electrical energy my genset comes in at only 14 pounds.


https://image.ibb.co/hv19XK/IMG_0976.jpg

https://image.ibb.co/eBaQ6e/IMG_0978.jpg

eric stoudemire
Go to Top of Page

estoudz
Starting Member

USA
22 Posts

Posted - 02/11/2019 :  16:50:30  Show Profile  Reply with Quote
I have finished wiring my 60V 50A sinewave brushless dc motor controller to my BMS and my 100A current shunt for my power/watt hr meter. I chose a sinewave controller due to the reduced harmonic currents induced in the motor which reduces motor heat and noise thus increasing motor efficency.


https://i.ibb.co/cFLWj8g/0211191702.jpg


eric stoudemire
Go to Top of Page

RomLight
Starting Member

USA
1 Posts

Posted - 06/24/2019 :  16:09:59  Show Profile  Reply with Quote
Amazing!

Romlight
Go to Top of Page

warren
human power expert

USA
6444 Posts

Posted - 06/25/2019 :  08:57:34  Show Profile  Visit warren's Homepage  Reply with Quote
You are making good progress.
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
www.recumbents.com © 2019 www.recumbents.com Go To Top Of Page
Snitz Forums 2000