Farfle joins the MENS club

Electric Motors and Controllers
toolman2
1 kW
1 kW
Posts: 419
Joined: Feb 23, 2010 9:34 pm

Re: Farfle joins the MENS club

Post by toolman2 » Aug 24, 2012 6:40 pm

Farfle wrote:And what's more awesome, at 250A, the windings will be making only 840 watts of heat.
so its 13.4m ohms resistance per phase? (13.4*250*250=840) -just wondering if thats how you worked it out.

User avatar
Farfle
10 MW
10 MW
Posts: 2097
Joined: Jun 27, 2010 10:42 am
Location: Moscow, ID
Contact:

Re: Farfle joins the MENS club

Post by Farfle » Aug 24, 2012 8:06 pm

The phase wire is 15 paralleled strands of 18awg. And each phase is roughly 5 m long. So 10m of phase in Wye. Double check my math here but each wire is .021 ohms/meter so .021 ohms x10m /15 strands is .014 ohms per phase. 250a at .014 ohms is 875 watts. Little off my quoted number :oops: but I think I did that calc from a more accurate length of the phase wire.
The race bike:
24s5p 50c nano tech
Badass custom mofo outrunner 205x177mm 26kv
Peak power in : 420A at 87v
Peak power out: 34 Hp and 105ft/lb

Build to last...
"It will be assaulted by the elements, It will be ravaged by time and it will be destroyed by the user. BUT, if you Stick to the little rules: K.I.S.S., Overbuild everything, and test, review, revise, repeat. It will last"


Team Farfle blog!! http://www.farfleselectrics.blogspot.com

User avatar
Farfle
10 MW
10 MW
Posts: 2097
Joined: Jun 27, 2010 10:42 am
Location: Moscow, ID
Contact:

Re: Farfle joins the MENS club

Post by Farfle » Aug 29, 2012 12:29 am

Almost there...

Hopefully should be a roller tomorrow night.

Image
The race bike:
24s5p 50c nano tech
Badass custom mofo outrunner 205x177mm 26kv
Peak power in : 420A at 87v
Peak power out: 34 Hp and 105ft/lb

Build to last...
"It will be assaulted by the elements, It will be ravaged by time and it will be destroyed by the user. BUT, if you Stick to the little rules: K.I.S.S., Overbuild everything, and test, review, revise, repeat. It will last"


Team Farfle blog!! http://www.farfleselectrics.blogspot.com

User avatar
MattyCiii
100 kW
100 kW
Posts: 1483
Joined: May 05, 2007 2:06 pm
Location: Boston, MA, USA

Re: Farfle joins the MENS club

Post by MattyCiii » Aug 29, 2012 12:52 am

Damn!
A massive home built motor, steel frame stout as a wrecking ball, and now an implementation of the mythical sprotor to boot?
:D
1st build: Dahon Jetstream folding bike. Quick, reliable, capable of 32mph. Light enough to lift, folds for easy transport by car/bus/train.
2nd build: RC powered 2009 Norco A-Line. Top speed 39mph. Built like a tank, it's resistant to Boston potholes, can stop on a dime, easily goes up/down curbs when necessary.
3rd build (just started): Scratch build ultimate utility bike. Based on a common power module using a NuVinci left side freewheel.

dbaker
100 kW
100 kW
Posts: 1071
Joined: Oct 24, 2008 2:32 pm

Re: Farfle joins the MENS club

Post by dbaker » Aug 29, 2012 5:47 am

Ebike art :mrgreen: :mrgreen: :mrgreen:

User avatar
fizzit
10 kW
10 kW
Posts: 803
Joined: Mar 10, 2010 10:14 pm
Location: Seattle, WA

Re: Farfle joins the MENS club

Post by fizzit » Aug 29, 2012 3:01 pm

That sprotor looks interesting! I think you will need to be very careful about lubing the chain, otherwise you might almost completely lose your back brake!
-Colin
my first ebike, a freeride mountain bike, using a turnigy 80-85, castle hv160, and turnigy lipo:
https://endless-sphere.com/forums/viewto ... 80#p607020

User avatar
rodgah
10 kW
10 kW
Posts: 584
Joined: Dec 23, 2009 7:07 pm
Location: Sunshine Coast, Australia

Re: Farfle joins the MENS club

Post by rodgah » Aug 31, 2012 1:33 am

with a motor that big who needs a back brake, e-braking 'could' be brutal. Awesome build, I look forward to seeing it go. Another sevcon, are you diy'ing the programming?
Common Sense isn't so common........
Image
Specialized BigHit
Electrapunk
Stinky

User avatar
Farfle
10 MW
10 MW
Posts: 2097
Joined: Jun 27, 2010 10:42 am
Location: Moscow, ID
Contact:

Re: Farfle joins the MENS club

Post by Farfle » Sep 23, 2012 12:47 pm

Here's some dyno pr0n for you all, peak hp was 24 at around 45mph. Max speed on the dyno was 77mph and max speed on the road is 81mph. Max input power was 318A at 89V and max stator temp on the dyno was 66C.


Last edited by Miles on Sep 23, 2012 1:20 pm, edited 1 time in total.
Reason: Fixed link
The race bike:
24s5p 50c nano tech
Badass custom mofo outrunner 205x177mm 26kv
Peak power in : 420A at 87v
Peak power out: 34 Hp and 105ft/lb

Build to last...
"It will be assaulted by the elements, It will be ravaged by time and it will be destroyed by the user. BUT, if you Stick to the little rules: K.I.S.S., Overbuild everything, and test, review, revise, repeat. It will last"


Team Farfle blog!! http://www.farfleselectrics.blogspot.com

User avatar
Miles
100 GW
100 GW
Posts: 11452
Joined: Mar 16, 2007 4:15 pm
Location: London UK

Re: Farfle joins the MENS club

Post by Miles » Sep 23, 2012 1:23 pm

8)

What was the Kv? How much did it weigh?

User avatar
Farfle
10 MW
10 MW
Posts: 2097
Joined: Jun 27, 2010 10:42 am
Location: Moscow, ID
Contact:

Re: Farfle joins the MENS club

Post by Farfle » Sep 23, 2012 1:32 pm

The KV ended up being about 26 and all up weight was 31lbs. It's a little on the fat side. With more patience and a better set of lathe tools I could have shaved another couple pounds off.
The race bike:
24s5p 50c nano tech
Badass custom mofo outrunner 205x177mm 26kv
Peak power in : 420A at 87v
Peak power out: 34 Hp and 105ft/lb

Build to last...
"It will be assaulted by the elements, It will be ravaged by time and it will be destroyed by the user. BUT, if you Stick to the little rules: K.I.S.S., Overbuild everything, and test, review, revise, repeat. It will last"


Team Farfle blog!! http://www.farfleselectrics.blogspot.com

User avatar
Farfle
10 MW
10 MW
Posts: 2097
Joined: Jun 27, 2010 10:42 am
Location: Moscow, ID
Contact:

Re: Farfle joins the MENS club

Post by Farfle » Sep 23, 2012 1:47 pm

The axle is 40mm in diameter where it goes thru the aluminum center stator support. And the drill I had to clear for the boring bar wasn't long enough to get there, so the stator has a 6" piece of 40mm chromoly solid rod thru it.
The race bike:
24s5p 50c nano tech
Badass custom mofo outrunner 205x177mm 26kv
Peak power in : 420A at 87v
Peak power out: 34 Hp and 105ft/lb

Build to last...
"It will be assaulted by the elements, It will be ravaged by time and it will be destroyed by the user. BUT, if you Stick to the little rules: K.I.S.S., Overbuild everything, and test, review, revise, repeat. It will last"


Team Farfle blog!! http://www.farfleselectrics.blogspot.com

hydro-one
10 kW
10 kW
Posts: 947
Joined: Dec 19, 2008 2:02 pm
Location: winipeg Canada

Re: Farfle joins the MENS club

Post by hydro-one » Sep 23, 2012 6:30 pm

WOW!!! not even maxed out yet!! cold stator!!
Pro ebiker
28s hk lipo
3ooA kelly/cromotor 17"
sana cruz bullit

User avatar
Farfle
10 MW
10 MW
Posts: 2097
Joined: Jun 27, 2010 10:42 am
Location: Moscow, ID
Contact:

Re: Farfle joins the MENS club

Post by Farfle » Sep 23, 2012 6:38 pm

On the racetrack the highest temp we hit was about 106C. It's got at least another 30% more power in it. But at this power level, it's super reliable and I don't have to mess with it.
The race bike:
24s5p 50c nano tech
Badass custom mofo outrunner 205x177mm 26kv
Peak power in : 420A at 87v
Peak power out: 34 Hp and 105ft/lb

Build to last...
"It will be assaulted by the elements, It will be ravaged by time and it will be destroyed by the user. BUT, if you Stick to the little rules: K.I.S.S., Overbuild everything, and test, review, revise, repeat. It will last"


Team Farfle blog!! http://www.farfleselectrics.blogspot.com

User avatar
Alan B
100 GW
100 GW
Posts: 7364
Joined: Sep 11, 2010 7:43 am
Location: San Francisco Bay Area, USA
Contact:

Re: Farfle joins the MENS club

Post by Alan B » Sep 23, 2012 6:39 pm

Farfle wrote:On the racetrack the highest temp we hit was about 106C. It's got at least another 30% more power in it. But at this power level, it's super reliable and I don't have to mess with it.
That is a great place to be.

John in CR
100 GW
100 GW
Posts: 13999
Joined: May 20, 2008 12:58 am
Location: Paradise

Re: Farfle joins the MENS club

Post by John in CR » Sep 25, 2012 4:02 am

Congrats on the great way your motor turned out and the win.

John

User avatar
johnrobholmes
10 GW
10 GW
Posts: 4369
Joined: Jul 07, 2008 2:19 pm
Location: Missouri
Contact:

Re: Farfle joins the MENS club

Post by johnrobholmes » Sep 25, 2012 9:43 am

I didn't see it discussed in the thread, did you just copy the tooth profile of the original laminations or did you tweak them a bit?

User avatar
Farfle
10 MW
10 MW
Posts: 2097
Joined: Jun 27, 2010 10:42 am
Location: Moscow, ID
Contact:

Re: Farfle joins the MENS club

Post by Farfle » Sep 25, 2012 9:57 am

I did tweak them a few mms in every direction. I made the tooth tips thicker and more contoured, the overall tooth is thicker and to compensate for the reduced copper area, I made the gaps deeper, so the teeth are longer, but still the same outer diameter. Basically I was just tweaking the shape and re-testing in femm to try to get as close to miles' posted flux densities as I could, while avoiding any super saturated points.
The race bike:
24s5p 50c nano tech
Badass custom mofo outrunner 205x177mm 26kv
Peak power in : 420A at 87v
Peak power out: 34 Hp and 105ft/lb

Build to last...
"It will be assaulted by the elements, It will be ravaged by time and it will be destroyed by the user. BUT, if you Stick to the little rules: K.I.S.S., Overbuild everything, and test, review, revise, repeat. It will last"


Team Farfle blog!! http://www.farfleselectrics.blogspot.com

nechaus
10 MW
10 MW
Posts: 2076
Joined: Oct 11, 2011 7:41 pm
Location: Brisbane > AUSTRALIA

Re: Farfle joins the MENS club

Post by nechaus » Oct 16, 2012 11:46 pm

wow, this is exciting for me to just watch you!!!

Im very keen to see some power wheelies!!!
Are you going to upload some videos soon of the bike in action?
The dyno video was not enough for me!!! i need more!!!

Trackman417
10 kW
10 kW
Posts: 998
Joined: May 05, 2011 9:25 am
Location: Bergen County, New Jersey

Re: Farfle joins the MENS club

Post by Trackman417 » Oct 17, 2012 5:58 am

Farfle wrote:IIIT LIVES!!! kinda... in fits and starts...

Hate to dog up the past, but what was wrong with the motor that it couldn't spin? Was it a motor issue or a controller issue?
K2 Sidewinder
H4065 36 mph
20s2p 10aH lipo battery pack
If it didn't kill you, it just built your character.
You know your bike is powerful when even you, the builder, can't control it.
Customer 00001 at our very own Bigmooses online store http://mtg-technologies.com/zencart/ Great guy, great products.

nechaus
10 MW
10 MW
Posts: 2076
Joined: Oct 11, 2011 7:41 pm
Location: Brisbane > AUSTRALIA

Re: Farfle joins the MENS club

Post by nechaus » Oct 17, 2012 6:07 am

Nothing wrong, its a brush-less motor and he was hitting one phase with some current, so it wont rotate

User avatar
Farfle
10 MW
10 MW
Posts: 2097
Joined: Jun 27, 2010 10:42 am
Location: Moscow, ID
Contact:

Re: Farfle joins the MENS club

Post by Farfle » Oct 26, 2012 5:50 pm

moving this thread over to here where the bike is :D

https://endless-sphere.com/forums/viewto ... 12&t=44393
The race bike:
24s5p 50c nano tech
Badass custom mofo outrunner 205x177mm 26kv
Peak power in : 420A at 87v
Peak power out: 34 Hp and 105ft/lb

Build to last...
"It will be assaulted by the elements, It will be ravaged by time and it will be destroyed by the user. BUT, if you Stick to the little rules: K.I.S.S., Overbuild everything, and test, review, revise, repeat. It will last"


Team Farfle blog!! http://www.farfleselectrics.blogspot.com

User avatar
Whiplash
1 GW
1 GW
Posts: 3079
Joined: May 10, 2010 2:55 pm

Re: Farfle joins the MENS club

Post by Whiplash » May 29, 2013 11:27 pm

Killer build! Got me thinking of a mini version!
Power is a fascinating thing, the more you have, the more you want, but the real power is having the restraint not to use it all at once...............Um...Yeah..

The harder you work.....The luckier you get!!

"People who say it can't be done are often interrupted by those that have already figured out how to do it!"

Email me @ currentcycles@gmail.com
OR check out http://www.CurrentCycles.net

Post Reply