Search found 23546 matches

by amberwolf
Apr 19, 2018 1:46 pm
Forum: E-Bike Technical
Topic: The ultimate torque arm (For <2kW and standard axles)?
Replies: 77
Views: 989

Re: The ultimate torque arm (For <2kW and standard axles)?

[*] Using the the controler's bridges to feed the BEMF back to the battery +ve to -ve. This is what the other of your motors is doing. Im not sure of its exact mechanism; I assume this is the one on the left side that uses whats sometimes called EABS, or active braking, where the controller activel...
by amberwolf
Apr 19, 2018 1:18 pm
Forum: E-Bike Non-hub Motor Drives
Topic: Throttle Behavior
Replies: 61
Views: 1417

Re: Throttle Behavior

fechter wrote:
Apr 19, 2018 8:39 am

I'll dig around my junk and see if I can find a Darlington to test.
If you cant find one, you can just hook up two regular ones to make one. ;)
by amberwolf
Apr 19, 2018 1:11 pm
Forum: Battery Technology
Topic: Tubular 18650 solderless pack
Replies: 41
Views: 7521

Re: Tubular 18650 solderless pack

We really appreciate that! :) I wish there was some way to make it more obvious that pictures can be attached, because the picture icon in the posting box only does links of them, and thats all most people ever see. If clicking the icon the first time when posting would have a text box to tell you t...
by amberwolf
Apr 18, 2018 9:39 pm
Forum: E-Bike General Discussion
Topic: Is REGEN, really worth it ?
Replies: 66
Views: 1644

Re: Is REGEN, really worth it ?

and if you use cells that can accept higher charge rates, theres n8t necessarily any weight penalty there either.
by amberwolf
Apr 18, 2018 4:47 am
Forum: Battery Technology
Topic: Tubular 18650 solderless pack
Replies: 41
Views: 7521

Re: Tubular 18650 solderless pack

This thread is one example of why images ought to be attached to the posts, so they are preserved with teh thread, rather than hosted on external sites that go away or change their operation, rendering such threads pointless without their images. :/
by amberwolf
Apr 18, 2018 4:42 am
Forum: E-Bike General Discussion
Topic: 2kw DD with compatible controller?
Replies: 2
Views: 50

Re: 2kw DD with compatible controller?

Well, EM3EV themselves probably have what youre after. If they dont, Grin Tech http://ebikes.ca should. BTW, you might want to have a mod merge this thread with your original where people were already trying to help you with the project https://endless-sphere.com/forums/viewtopic.php?f=3&t=93628&p=1...
by amberwolf
Apr 18, 2018 4:05 am
Forum: E-Bike Technical
Topic: The ultimate torque arm (For <2kW and standard axles)?
Replies: 77
Views: 989

Re: The ultimate torque arm (For <2kW and standard axles)?

Apologies for derailing the thread...it wasnt my intention. :( For those that want the OT info below, Ive just shrunk it to keep the OT to a minimum. :/ v Amber's setup doesn't use particularly powerful motors as I understand it, just that it has two, but each has it's own torque arms. Doubling the ...
by amberwolf
Apr 18, 2018 3:13 am
Forum: Battery Technology
Topic: 12v lithium battery type (with photos)
Replies: 6
Views: 139

Re: 12v lithium battery type (with photos)

unclejemima wrote:
Apr 17, 2018 10:25 am
Just curious...if the wall wart charger is gone, can I charge it via the power leads (+&-)?
Keep in mind what I said in the post above about the charge vs discharge port:
https://endless-sphere.com/forums/viewt ... 4#p1373175
by amberwolf
Apr 18, 2018 3:01 am
Forum: Battery Technology
Topic: LiFePO4 Recommendation?
Replies: 23
Views: 473

Re: LiFePO4 Recommendation?

flippy wrote:
Apr 17, 2018 9:35 am
Doenst headway sell any cells anymore?
If you like heavy saggy unmatched cells, sure. :/

Their single advantage might be that you can just bolt them together (assuming you get the screw terminal varieties).
by amberwolf
Apr 18, 2018 2:55 am
Forum: E-Bike Non-hub Motor Drives
Topic: Throttle Behavior
Replies: 61
Views: 1417

Re: Throttle Behavior

I'm nearly certain the PAS sensors are something like the motor halls or a SS41, which has an open collector output. The one in one of the Fusin PAS sensors I have is an SS41 or similar cllone, IIRC (been a long time since I opened it up), but it operates the same way as a motor hall does (except I...
by amberwolf
Apr 18, 2018 2:43 am
Forum: E-Bike General Discussion
Topic: Stongest tandem ebike wheel build help
Replies: 55
Views: 1128

Re: Stongest tandem ebike wheel build help

I called around to custom motorcycle builders and they had no clue where to get spokes custom cut and reamed. I also went to motorcycle dealers and the parts guys had no clue. They dont sound like very useful poeple. 5 seconds on google with a partial quote of you above found various places https:/...
by amberwolf
Apr 18, 2018 2:34 am
Forum: E-Bike General Discussion
Topic: Stongest tandem ebike wheel build help
Replies: 55
Views: 1128

Re: Stongest tandem ebike wheel build help

Bicycle spokes go up to 13g realistically; maybe 12g with really good rims/hubs. Beyond that, stuff like 10g and larger, theyre really moped or motorcycle spokes, in that the rims and hubs needed for them are not generally found in bicycle stuff.
by amberwolf
Apr 18, 2018 1:54 am
Forum: E-Bike Photos & Video
Topic: My Sun Trip Bike, Back to Back Tandem Trike with Rowing Generator, Pedals, +Solar
Replies: 33
Views: 951

Re: My Sun Trip Bike, Back to Back Tandem Trike with Rowing Generator, Pedals, +Solar

I'm hopeful that on the rowing bike it will be possible to have a grip and hand position that is easier on the skin since it's just a straight pulling motion all the time. What about using a (silicone?) grip formed to the hand that flexes along its length and is mounted to the bars by two (or more)...
by amberwolf
Apr 18, 2018 1:15 am
Forum: Items for Sale - Used
Topic: Selling my Moto Parilla 750w VIP ebike NYC
Replies: 1
Views: 65

Re: Selling my Moto Parilla 750w VIP ebike NYC

price? details? pics? other required info per the for sale rules?
by amberwolf
Apr 16, 2018 10:57 pm
Forum: E-Vehicles General Discussion
Topic: Titanium bikes set to get cheaper?
Replies: 12
Views: 158

Re: Titanium bikes set to get cheaper?

Does your specific personal use benefit from Titanium over other materials? If not, then no.
by amberwolf
Apr 16, 2018 10:52 pm
Forum: E-Bike General Discussion
Topic: ebike controller with any type of BMS in it?
Replies: 8
Views: 144

Re: ebike controller with any type of BMS in it?

Seems hes saying theres somethign more than just a connection required to activate the output and/or input to the packs, via the BMS. Probably it requires some form of serial data communication (like some laptop packs), and without knowing what to say and how to say it then whatever you plug it into...
by amberwolf
Apr 16, 2018 7:40 pm
Forum: General Discussion
Topic: Standard formula for Calculating Ebike Range
Replies: 12
Views: 183

Re: Standard formula for Calculating Ebike Range

You can also use those efficiency numbers to weigh against the price as well since bigger batteries cost more and require a more powerful (and expensive) motor. Mmm...I think you have that backwards unless Im misunderstanding what you mean. The batteries dont weigh that much vs all the other stuff ...
by amberwolf
Apr 16, 2018 7:25 pm
Forum: General Discussion
Topic: Standard formula for Calculating Ebike Range
Replies: 12
Views: 183

Re: Standard formula for Calculating Ebike Range

I might be misunderstanding what you mean, but the 20wh/mile in the original equation *is* the efficiency, as a generally worst-case estimation. Inverting the number gives you miles/wh, if you want that number. Different bikes and different riding styles, terrains, weather conditions, etc., will all...
by amberwolf
Apr 16, 2018 7:06 pm
Forum: E-Bike Non-hub Motor Drives
Topic: Throttle Behavior
Replies: 61
Views: 1417

Re: Throttle Behavior

I guess another, simpler approach would be to make something that resembles a throttle but is just a switch you can tie into the existing level buttons to make changing levels easier while riding. Imagine a thumb throttle that is centered in the middle and moves both ways to increase or decrease st...
by amberwolf
Apr 16, 2018 6:46 pm
Forum: E-Bike Technical
Topic: The ultimate torque arm (For <2kW and standard axles)?
Replies: 77
Views: 989

Re: The ultimate torque arm (For <2kW and standard axles)?

Oh. :( (this is why I often tell people that me and math dont get along...because I think I do it right and then find out I made some serious mistake). But thats ok, youre not designing these for stuff like mine. ;) 400lbs+ is with me on there, without any dogs or cargo. Figured it was over half a t...
by amberwolf
Apr 16, 2018 6:34 pm
Forum: Motor Technology
Topic: Front hub motor cable inlet protection?
Replies: 5
Views: 85

Re: Front hub motor cable inlet protection?

wilca428 wrote:
Apr 16, 2018 8:44 am
When the u-turn part is unprotected it gets snagged in.
Snagged in what?
by amberwolf
Apr 16, 2018 6:11 pm
Forum: Battery Technology
Topic: Parallel use of Meanwell constant current HLG 'chargers'
Replies: 6
Views: 101

Re: Parallel use of Meanwell constant current HLG 'chargers'

The HLG-600H-54A units I have work fine in parallel, delivering double the current with equal heat in both chargers, when tuned to the same voltage.

They also work fine with two pair of paralleled units in series, for doulbe the voltage and double the current.
by amberwolf
Apr 16, 2018 5:54 pm
Forum: General Discussion
Topic: Standard formula for Calculating Ebike Range
Replies: 12
Views: 183

Re: Standard formula for Calculating Ebike Range

I commend the idea, but as long as they can get away with it, sellers (and manufacturers) are going to claim the highest possible range they can to make them sound better than the next guy, like they do now. Even if that range is supposedly on a forever-length downhill with a hurricane-force tailwin...
by amberwolf
Apr 16, 2018 5:44 pm
Forum: Battery Technology
Topic: Increasing voltage on charger
Replies: 2
Views: 65

Re: Increasing voltage on charger

It might--the only way to know is to try it while measuring voltage. If you measure current at the same time youll also see if it changes taht instead of voltage, if you see no change in voltage. But its unlikely to have that much adjustment range--usually its just a few volts. Something to keep in ...