ELECTRIC TRANSMISSION DELTA /WYE and SERIE/PAPALLEL stator

[fechter]

Totally unrelated - When I tune the shunt in controllers I use a big oil heater for a load. It gives me about 10A @ 100V DC. When I pull the lead away I can yank a spark about 1" long. It is like a light show and my wife about has a heart attack every time I do it. After 4 or 5 times the solder pad on the board is trashed. -methods

We need a video of that

I think if you can interrupt the controller output at just the right time, you can switch fast enough so you barely feel any loss of thrust. This would greatly extend the life of the relay contacts. I would guess that only of of the 3 contacts would really be arcing when you switch. Statistically, this would spread the wear out over all 3, so maybe it's not a big issue. When the contacts close, since there is a lot of inductance, there won't really be any spark. If the motor is going too fast when you 'downshift', the BEMF may exceed the battery voltage and result in a large regen current. Depending on your cell impedance, the system voltage may or may not increase enough to blow anything.

 

[methods]

We need a video of that

I agree!
They just rolled out the firmware update to my G1 so I can now take video
If I get my wife to film it we will have a free peanut gallery
She is electriphobic

-methods

 

[Doctorbass]

All this arcing problem is not an issue with Aerospace grade Leach vaccum sealed 3PDT contactor .. same category as the killovac ev200 but made by leach.. the only thing is that they cost 1500usd each

I got mine at 20$ on ebay... but when i bought it i did not know the real price of it.. then i realized how it cost when i attempted to get another direct from leach!

I still think there is a way to get a sealed 3PDT relay for better price!

Doc

 

[BatteryMooch]

$1500 is a great deal!
Panasonic's new EV300 relay (http://pewa.panasonic.com/pcsd/product/auto/pdf/mech_eng_ev.pdf) is only SPST (1 Form A) and it costs US$400-US$600!

 

[methods]

Totally unrelated - When I tune the shunt in controllers I use a big oil heater for a load. It gives me about 10A @ 100V DC. When I pull the lead away I can yank a spark about 1" long. It is like a light show and my wife about has a heart attack every time I do it. After 4 or 5 times the solder pad on the board is trashed. -methods

We need a video of that

Ask and you shall receive.

Ever wonder what that little kid who played with matches grew up to be???

RIGHT HAND CLICK - SAVE AS -> -> -> PLEASE DO NOT STREAM
1" lipo sparks (34Mb)


(yes that is 20LBS of Lithium Polymer - Captain Safety, where ever you are... Save the speech :wink: )

-methods

 

[GGoodrum]

(yes that is 20LBS of Lithium Polymer - Captain Safety, where ever you are... Save the speech :wink: )

You rang??

I've said it before... there's a madness to your methods. :wink:

 

[methods]

Thats why my email is "DeviantMethods".

Btw - dont hook up the ebrake on that controller I sent you

lol...

I will explain later.

-methods

 

[liveforphysics]

We need a video of that

I agree!
They just rolled out the firmware update to my G1 so I can now take video
If I get my wife to film it we will have a free peanut gallery
She is electriphobic

-methods

Bro, you gotta hack your G1 for root and use the cupcake JF 1.51 build. Best thing to happen to phones. I also setup a super battery on mine, and now i can do the wifi tether to be a mobil access point for like 8hrs on a charge . Nothing like downloading torrents at 1mbs while driving .

 

[Doctorbass]

Totally unrelated - When I tune the shunt in controllers I use a big oil heater for a load. It gives me about 10A @ 100V DC. When I pull the lead away I can yank a spark about 1" long. It is like a light show and my wife about has a heart attack every time I do it. After 4 or 5 times the solder pad on the board is trashed. -methods

We need a video of that

Ask and you shall receive.

Ever wonder what that little kid who played with matches grew up to be???

RIGHT HAND CLICK - SAVE AS -> -> -> PLEASE DO NOT STREAM
1" lipo sparks (34Mb)


(yes that is 20LBS of Lithium Polymer - Captain Safety, where ever you are... Save the speech :wink: )

-methods

Method.. you are discovering the joy of a Jacob's ladder arcing!!
[youtube]ZLcHLemJUrw[/youtube]

Doc

 

[tailwind]

Greg

 

[Achim]

Ok ok, just one more

http://www.youtube.com/watch?v=WZZxXVS9Qyc

 

[Doctorbass]

Ok ok, just one more

http://www.youtube.com/watch?v=WZZxXVS9Qyc

that'S a classic! :wink: and still impressive!! I like the sound... i would like to have this sound when i power ON my controller! and then ... ready to go!

 

[Achim]

Doc you WILL have that sound if you keep going on like this

 

[zukster]

yes i see what your saying after a few test rides, a button on the bars would be better. i was passing cars today. :lol:

Big deal. I pass cars everyday with my Bafang and little controller and NO delta/wye mod.

Mind you - they're all parked at the side of the road

 

[steveo]

no video update still

doc i'm cranking over 100amps into that motor on delta with my mega diy controller ... and no problems lol .. its pulls fairly hard for the little motor though .. but nothing comparing like the x-lite at 100 amps lol ..

I want to do a 2wd star/delta with a bmx bike ... however .. it seem very hard to find a cheap bmx that has disc brake setup.

-steveo

 

[methods]

I am working on a 2WD 9C running at 88V @100A each

You are right though... The 9C does not put out nearly as much poop as the X5 @ 100A
Of course it also costs 1/3 the price and weighs half as much....

A 2WD 9C with 88V @ >60A will dominate... Good luck keeping traction on the front wheel.

-methods

 

[steveo]

I am working on a 2WD 9C running at 88V @100A each

You are right though... The 9C does not put out nearly as much poop as the X5 @ 100A
Of course it also costs 1/3 the price and weighs half as much....

A 2WD 9C with 88V @ >60A will dominate... Good luck keeping traction on the front wheel.

-methods

Hey Methods

Do you have any photos of your 2wd 9c build? .. What tire size did you use?
My motors used 16" tires x 3" even though i could use 16" x 2.125 bicycle tire

I was thinking of using a bmx frame but i need the disc brakes for this type of build to work ..


i think my winding are 9 by 6 ... check this photo out from the stator ..

-steveo

 

[rkosiorek]

steveo,

i thought the choices were either 7 turns or 6 turns for the winding. what do you mean by the term "9 by 6"?

rick

 

[Karolis]

Sorry for OT, but does anybody know, where to get spokes for conversion from 26" to 24" wheel for golden motor. Will I feel some reasonable diffrence in torque? Now I am running 1000W 26" 60V 12Ah of SLA and I shunted controller with 2cm 12AWG wire. Rezults 55-59km/h and gets there pretty fast compared to stock. Perfomance quite good, but still wanted more torque, but also wanted a little top speed left. Sorry for my English, I hope You understand what I want to ask. Thanks.

 

[methods]

Wow... And I thought we were getting off topic

Steveo - lets talk about that off line.

Rick - There are at least 3 or 4 flavors of the 9C. Ebikes.ca sells two, one of which is a 10x6 (high KV model). Amped bikes sells a 9x7 (middle KV). Other companies sell even lower KV models. There is a thread around here that really gets into it. Someone pointed out that they should always multiply out to around 60, so any winding that multiplies to near 60 is probably available.

-methods

P.S. I think your 9C is an 11x5 btw. (Actually - that is a total guess. Let me look at the sticker on mine later)

10x6 = 60
9x7 = 63
11x5 = 55

 

[RoughRider]

so, NO delty/star switch on the X5??

 

[steveo]

so, NO delty/star switch on the X5??

it doesn't work man .. i tired it !

-steveo

 

[RoughRider]

i dont understand why it is not working...

can you run the motor ONLY in delta or in star? or is it not running in delta??

 

[rkosiorek]

stock the motor is connected as a STAR. it does not work well as a DELTA. the reason given by Justin at e-bikes.ca is:

"Delta windings only really work with sinusoidally wound motors, the back-emf of the Nine Continent is a very close sin wave so the 3 phases cancel out when connected in Detla. The Crystalyte motors are more closely trapezoidal wound, which is better for most BLDC controllers but it means you get circulating currents when all the phases are connected in a ring because the 3 back-emf voltages do not always cancel out.

Justin"

personally i know a 5302 does not run in a DELTA. that is why i'm going to a 5302/5304 star wound system. I just finished machining the stator to take the relays so the switching will be done internally. the motor has 2 parallel sets of 2 turn windings with individual teminations. if i connect them in parallel it should work like a 5302. connect in series it should be a 5304.

i gotta get some supplies so that i can finish the wiring. hope to finish this soon.

rick

 

[methods]

I have a blown 5305 if someone would like to try a re-wind.
I would sell it for a very reasonable price.
Available to anyone in the Bay Area since shipping would be unreasonable.

-methods