Search found 10207 matches

by spinningmagnets
Apr 24, 2018 2:52 pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Since the Sur-ron dirt bike was such a success anyone have info on their motorcycle
Replies: 31
Views: 1723

Re: Since the Sur-ron dirt bike was such a success anyone have info on their motorcycle

"6kw" may not sound like much for someone who has never ridden an EV. The full torque is available from 1-RPM and up. This is a relevant characteristic, regardless of which make and model of EV we are talking about. I can refill a gasoline moto in 15 seconds, but...I also might not be allowed to rid...
by spinningmagnets
Apr 24, 2018 2:45 pm
Forum: E-Bike Technical
Topic: Wire Type
Replies: 5
Views: 55

Re: Wire Type

The thickness of the wire has a minimal relationship with the voltage. The characteristic of concern is the heat that results from amps. There is a "continuous" and also a "temporary peak" amp-rating for wires. For a 20A max controller, you will be fine with 12GA. If this was for an application wher...
by spinningmagnets
Apr 21, 2018 6:49 pm
Forum: E-Bike General Discussion
Topic: The ebike parts designing thread with CAD/CAM
Replies: 119
Views: 4960

Re: The ebike parts designing thread with CAD/CAM

Thanks for posting that link, Alan. For those who are new here, there are two reasons to use a linear hall sensor assembly with an "off the shelf" motorcycle throttle (which pulls and pushed a cable). For Gwhy! (in the link) the ebike is for trials-style riding, and the "feel" of the throttle is som...
by spinningmagnets
Apr 18, 2018 9:08 pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1315
Views: 135925

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

200 phase amps max, 80 amps @ 80 volts battery. Not sure which winding but it went 60 mph For 60-MPH and 80A X 80V = 6400W, I would go straight to the QS 205/50H V3. It would provide more torque at those input watts, and I suspect it might last the rest of your life... Even the MXUS Turbo3K would d...
by spinningmagnets
Apr 16, 2018 12:57 pm
Forum: E-Vehicles General Discussion
Topic: Titanium bikes set to get cheaper?
Replies: 12
Views: 192

Re: Titanium bikes set to get cheaper?

China and Russia both have a lot of domestic titanium coming from their own mines. Titanium is able to be recycled. Most of the mined titanium goes into the manufacture of aircraft, but most "used" titanium from worn out aircraft is not recycled into new aircraft parts due to the risk of contaminati...
by spinningmagnets
Apr 16, 2018 11:20 am
Forum: General Discussion
Topic: Standard formula for Calculating Ebike Range
Replies: 14
Views: 294

Re: Standard formula for Calculating Ebike Range

I propose the value of 20 Watt-hours per mile at 20 MPH, since the current US ebike guidelines limit legal ebike speeds to 20 MPH, and this is a speed that can be achieved relatively easily with a legal 750W motor. Conditions would also include: a flat, smooth road, no stopping & starting or hills,...
by spinningmagnets
Apr 15, 2018 7:00 pm
Forum: E-Vehicles General Discussion
Topic: Jaguar iPace EV revealed + photos added
Replies: 12
Views: 1575

Re: Jaguar iPace EV revealed + photos added

I read a lot, and I know this is unscientific, but...my informal polling indicates that every car manufacturer who adds an EV model to their line-up experiences a sudden boost in their reliability. E-systems are fairly well-known, mature, and hard to screw up...any manufacturer who has developed a r...
by spinningmagnets
Apr 15, 2018 6:48 pm
Forum: E-Bike Technical
Topic: The ultimate torque arm (For <2kW and standard axles)?
Replies: 105
Views: 1687

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

You can't just go putting notches and sharp corners on parts that are stressed in tension. When you do that, you're telling it exactly where to fail, and to do it quickly Chalo, you sound like you may have some legitimate concerns, could you throw together a quick and dirty drawing of what you cons...
by spinningmagnets
Apr 15, 2018 6:40 pm
Forum: Motor Technology
Topic: Buick Lacrosse 2012 e-assist moto-alternator
Replies: 124
Views: 8330

Re: Buick Lacrosse 2012 e-assist moto-alternator

Thanks for opening it up and posting pics!....
by spinningmagnets
Apr 15, 2018 11:27 am
Forum: Battery Technology
Topic: StorEn Vanadium Flow Batteries
Replies: 3
Views: 105

Re: StorEn Vanadium Flow Batteries

I think these look good on paper, but the minimum buy-in is a unit about the size of a refrigerator (the last time I checked), and it was somewhat pricey. That being said, it seemed like a good long-term investment. for an RE home... I believe once the 25 years are up (or however long they actually ...
by spinningmagnets
Apr 13, 2018 9:53 am
Forum: E-Bike Technical
Topic: Arc explosion on first time build test
Replies: 9
Views: 205

Re: Arc explosion on first time build test

KFF = Kentucky Fried Fingers

"What's the best treatment for KFF?" (2 pages, PICs)
https://endless-sphere.com/forums/viewt ... 3&start=25

Image
by spinningmagnets
Apr 13, 2018 9:47 am
Forum: E-Bike General Discussion
Topic: Is REGEN, really worth it ?
Replies: 73
Views: 2043

Re: Is REGEN, really worth it ?

Well said, Alan. I agree... When I was young and stupid (I am no longer young), I was riding a bicycle and came to a long downhill (Signal Hill in Los Angeles). I knew I had to "take it easy" on the downhill, but figured that I would simply bring it to a stop if the brakes were struggling, and then ...
by spinningmagnets
Apr 13, 2018 9:17 am
Forum: E-Bike Technical
Topic: Arc explosion on first time build test
Replies: 9
Views: 205

Re: Arc explosion on first time build test

The motor phase wires, and also the Hall wires can be connected in the "wrong" orientation without damage. Such a motor would run porly, run backwards, or not run at all. As to the throttle wires, those are typically 5V, and if they fail in the full on position, it would not produce a huge spark at ...
by spinningmagnets
Apr 13, 2018 7:18 am
Forum: E-Bike Technical
Topic: The ultimate torque arm (For <2kW and standard axles)?
Replies: 105
Views: 1687

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

No apologies necessary, I am quite familiar with "drunk posting" (and my best friend, the "edit" feature). For the casual readers, please be aware that the ES membership are not a monolithic bloc with a single hive-mind. Sometimes...very valuable engineering information is revealed when two posters ...
by spinningmagnets
Apr 13, 2018 5:09 am
Forum: Battery Technology
Topic: Salvaged EV cells index: Leaf, Volt, Tesla, Zero, etc
Replies: 38
Views: 3154

Re: Salvaged EV cells index: Leaf, Volt, Tesla, Zero, etc

There are hybrid cars that have a mode where they are running with the gasoline auxiliary engine on. However, when they come to a stop-light, the engine is turned off during the wait. When the light turns green, the engine is rapidly re-started. ...The 5Ah LTO prismatic pouch cell, EIG Model T005, i...
by spinningmagnets
Apr 13, 2018 4:41 am
Forum: E-Bike General Discussion
Topic: How to improve my friction drive situation?
Replies: 20
Views: 779

Re: How to improve my friction drive situation?

You might want to consider designing some type of cargo rack above the rear tire, and then mounting the motor underneath it. Doing that might provide more options, since you are very limited by trying to squeeze the assembly into that particular location...
by spinningmagnets
Apr 13, 2018 4:27 am
Forum: E-Bike Technical
Topic: The ultimate torque arm (For <2kW and standard axles)?
Replies: 105
Views: 1687

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

I apologize for the lack of detail in my response. You've done a very good job on this design, which you clearly have put some time into. Your design incorporates some elements that are not common and they are intriguing enough that I would very much like to see it proceed to the testing phase of de...
by spinningmagnets
Apr 12, 2018 12:20 am
Forum: Battery Technology
Topic: Is is it possible to build a 48 or 52v battery pack using removable (non soldered) 18650 cells
Replies: 23
Views: 405

Re: Is is it possible to build a 48 or 52v battery pack using removable (non soldered) 18650 cells

There might be some useful ideas in here...[from the ES battery stickey index]

"Another No Solder/Weld 18650 Build" (snath, 6 pages [plus more links to other no-solder/no-weld builds])
https://endless-sphere.com/forums/viewt ... 14&t=57810
by spinningmagnets
Apr 12, 2018 12:12 am
Forum: E-Bike Photos & Video
Topic: Rejected due to shipping "damage"
Replies: 6
Views: 293

Re: Rejected due to shipping "damage"

Sounds like he was looking for an excuse. Either that, or his spouse had some time to think about spending money on something he wanted.
by spinningmagnets
Apr 11, 2018 5:21 am
Forum: General Discussion
Topic: ES stickers
Replies: 1
Views: 79

Re: ES stickers

A while back in 2010, I ordered 100 from stickerjunkie.com, and a year later 100 more. I was selling them for $2 for 2 (postage included). I have no objection to you selling stickers of any type. Occasionally, someone around here makes up some T-shirts and sells them. You might ask Justin first? htt...
by spinningmagnets
Apr 11, 2018 5:12 am
Forum: E-Bike General Discussion
Topic: Equipment to use with MXUS 3k Turbo
Replies: 9
Views: 363

Re: Equipment to use with MXUS 3k Turbo

I'm glad you posted AW, you have more hands-on experience with long range riding. Yeah, sometimes its not about designing a system to try and meet a goal, its about deciding which parts of the performance targets you are most willing to give up, in order to achieve anything.
by spinningmagnets
Apr 10, 2018 12:44 pm
Forum: Battery Technology
Topic: LTO Lithium Titanium Oxide (Titanate) Battery 30S - Seeking the Ultimate Commuter Battery
Replies: 103
Views: 4515

Re: LTO Lithium Titanium Oxide (Titanate) Battery 30S - Seeking the Ultimate Commuter Battery

I like it!...as long as the battery tabs are aluminum-to-aluminum, the metal on the outside that is clamping them together is free to be steel, brass, etc...
by spinningmagnets
Apr 10, 2018 8:46 am
Forum: E-Bike Technical
Topic: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers
Replies: 120
Views: 3396

Re: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers

If we are talking about raising the power that can be applied to a given hubmotor without the axle breaking, I think its useful to acknowledge that many of the broken Crystalyte axles of yesteryear placed the TA outside the frame drop-outs (farther away from the fat axle shank). Justins design propo...