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by John in CR
Oct 04 2020 5:01am
Forum: Motor Technology
Topic: Enertrac hub motor cutting out
Replies: 24
Views: 1040

Re: Enertrac hub motor cutting out

Sorry that I missed your previous post. It was definitely the correct wiring, since the controller does the auto-config, it tells me it had to be a controller problem. You had thoroughly gone through the process of elimination to prove it. While that first controller may have been under-powered for ...
by John in CR
Oct 04 2020 4:37am
Forum: Motor Technology
Topic: FOC for power and SOC (Stator Oriented Control) for regen?
Replies: 6
Views: 526

FOC for power and SOC (Stator Oriented Control) for regen?

After seeing Leboski's post that stator oriented control was more efficient for regen braking, I started wondering how much difference it would make. Then on my latest build on the first test ride only one controller was running the 6 phase motor. While everything was fine running nice and smooth un...
by John in CR
Oct 04 2020 4:14am
Forum: E-Bike General Discussion
Topic: Looking for wide 24" tubeless tires
Replies: 12
Views: 296

Re: Looking for wide 24" tubeless tires

How much more often do you have to put air in a tubeless bicycle tire than one with a tube? That's one of the big reasons I got away from bicycle tires only...pumping them up so often. I used Kenda Flames for years...long lasting but dangerous handling if you go all out, poor traction on wet streets...
by John in CR
Oct 04 2020 3:58am
Forum: E-Bike General Discussion
Topic: Need a custom extreme heavy duty rim built for my Juiced ODK U500
Replies: 14
Views: 544

Re: Need a custom extreme heavy duty rim built for my Juiced ODK U500

Forum member John at Holmes Hobbies builds quality wheels for ebikes, so contact him. In the future, don't ignore things like a cracked rim. That could get you hurt bad, and you got lucky that your cracked rim failed in a manner that wasn't catastrophic.
by John in CR
Oct 04 2020 3:39am
Forum: E-Bike General Discussion
Topic: Can I wire my ignition switch to my 5v throttle line?
Replies: 13
Views: 339

Re: Can I wire my ignition switch to my 5v throttle line?

speedyebikenoob wrote:
Oct 04 2020 12:25am
Thank you all for the suggestions, the key switch fits perfectly and seems to work fine. :)
:bigthumb:
by John in CR
Oct 03 2020 6:44pm
Forum: E-Bike General Discussion
Topic: Can I wire my ignition switch to my 5v throttle line?
Replies: 13
Views: 339

Re: Can I wire my ignition switch to my 5v throttle line?

Well then, looks like I'll try it. The key switches are only $5 anyways. Thanks! If you have a choice try to get one with smooth key faces on the plastic part. Then using a soldering iron you can easily etch an identifying mark. I have a bunch of different bikes, so it comes in handy for me. For a ...
by John in CR
Oct 03 2020 6:30pm
Forum: E-Bike General Discussion
Topic: Can I wire my ignition switch to my 5v throttle line?
Replies: 13
Views: 339

Re: Can I wire my ignition switch to my 5v throttle line?

It will last. Or, if you ever need to do better, you can buy a 110v toggle switch at the hardware store and work a custom mount to your handlebar. Those simple lamp toggle switches are very robust and can survive many crashes. That is the reason I use them now. We've had some trouble with common ge...
by John in CR
Oct 03 2020 8:08am
Forum: E-Bike General Discussion
Topic: Can I wire my ignition switch to my 5v throttle line?
Replies: 13
Views: 339

Re: Can I wire my ignition switch to my 5v throttle line?

Do you know what voltage that separate wire had flowing through it on your controllers? Mine does have a separate wire, but it runs the pack voltage through it, so 60v and my switch is only rated for 12v. Mine have always been at pack voltage...voltages as high as 128V fresh off the charger and the...
by John in CR
Oct 02 2020 8:05pm
Forum: E-Bike Technical
Topic: Do cooler motors run quicker?
Replies: 16
Views: 628

Re: Do cooler motors run quicker?

Not a matter of speed but how long you can ride at what slope, thats why there is Statorade by Grintech. https://www.ebikes.ca/shop/electric-bicycle-parts/motor-hardware/cooling-mods/statorade.html Never used the stuff and the motors on my performance rides run cooler. The highest I've seen is 103°...
by John in CR
Oct 02 2020 7:51pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Need help understanding / picking fuse for 24v 250w motor batteries
Replies: 4
Views: 201

Re: Need help understanding / picking fuse for 24v 250w motor batteries

Ill second aussieriders views. Fuses that are only marginally above the controllers rated output get hot, melt stuff and often don't die. They just make trouble. You want it to waltz in a long hill, or sustained high speed. So think double your Max controller output (15a?) as a starting point. Most...
by John in CR
Oct 02 2020 7:45pm
Forum: Motor Technology
Topic: Quietest motor for making a mid-drive
Replies: 4
Views: 385

Re: Quietest motor for making a mid-drive

ebikeman,

What kind of power, all up load, and terrain do you plan to run. Most noise isn't from the motor itself, so you need a low Kv motor, which can make the drive train almost as quiet as a DD hubmotor unless you're going shaft drive with a very high quality gear reduction.
by John in CR
Oct 02 2020 7:39pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 593
Views: 75886

Re: QS 3000w midmotor

Someone need to tell them to harden the splined part of those shafts. Both the premature wear and loose fit are totally unacceptable, and welding the sprocket to the shaft as the only real fix is crazy. Electrics need to be built with a 10yr mininum life requirement unless someone has inside info th...
by John in CR
Oct 02 2020 7:25pm
Forum: E-Bike General Discussion
Topic: Can I wire my ignition switch to my 5v throttle line?
Replies: 13
Views: 339

Re: Can I wire my ignition switch to my 5v throttle line?

Are you sure you don't have a separate wire from the controller to turn it on? It's been 3yr or so, but all of the YYK controllers I ordered samples of had a separate wire to turn them on, a pack voltage wire. Check with them directly if unsure and have all your controller label info handy in case y...
by John in CR
Oct 02 2020 3:42am
Forum: E-Bike General Discussion
Topic: Leafmotor project
Replies: 60
Views: 1259

Re: Leafmotor project

Slow motor has way more torque ------> if you dont compensate by changing a single parameter, but thats not really a proper comparison. Once you change the parameter to compensate the slower motor has very slight advantage... Mark, Actually that isn't true, because the controllers behave very diffe...
by John in CR
Oct 01 2020 12:19pm
Forum: E-Bike Technical
Topic: Do cooler motors run quicker?
Replies: 16
Views: 628

Re: Do cooler motors run quicker?

Cooler runs a bit faster and less efficiently. Here's a graph of a nice cool motor vs a hot one.
Cool vs hot motor.JPG
Cool vs hot motor.JPG (156.28 KiB) Viewed 270 times
by John in CR
Oct 01 2020 2:55am
Forum: E-Bike General Discussion
Topic: Leafmotor project
Replies: 60
Views: 1259

Re: Leafmotor project

What could be more of a fair, equal comparison than the same controller, same battery, and same motor with the only difference being winding? It's wrong because a controller appropriate for a slow wind motor isn't appropriate for a fast wind motor and vice versa, It’s the one that comes with the mo...
by John in CR
Oct 01 2020 1:01am
Forum: E-Bike General Discussion
Topic: Leafmotor project
Replies: 60
Views: 1259

Re: Leafmotor project

What could be more of a fair, equal comparison than the same controller, same battery, and same motor with the only difference being winding? Will you answer this simple question, please? It's wrong because a controller appropriate for a slow wind motor isn't appropriate for a fast wind motor and v...
by John in CR
Sep 30 2020 11:02pm
Forum: E-Bike General Discussion
Topic: Leafmotor project
Replies: 60
Views: 1259

Re: Leafmotor project

...proving that the things I say are true. Maybe that proves it to you. What would prove it to me, would be if I could see it in the motor simulator. You say it's there. Tell us where. There are several motors to choose from with multiple winding options - I've been using 9C+, but I don't care. Wha...
by John in CR
Sep 30 2020 2:47am
Forum: E-Bike General Discussion
Topic: Leafmotor project
Replies: 60
Views: 1259

Re: Leafmotor project

Which failures you've been telling us are because of slow winds, because of their higher resistance. Almost every burned up motor on the forum. This resistance problem was apparently unknown to the people who set up the motor simulator profiles, because it doesn't show up there? Like I said early, ...
by John in CR
Sep 30 2020 1:13am
Forum: Alternative Energy
Topic: Don't we all wish we had this on our property
Replies: 10
Views: 1060

Re: Don't we all wish we had this on our property

It's been a while since I did the research to confirm his estimate of 6kw continuous as a fairly conservative estimate, but it was more than enough to offset the $1k/mo electric bill for his dairy farm. Note that our 98% green electricity is nationalized, and despite being primarily hydro power, ou...
by John in CR
Sep 29 2020 11:19pm
Forum: E-Bike General Discussion
Topic: Leafmotor project
Replies: 60
Views: 1259

Re: Leafmotor project

Given a 26" rear wheel, doesn't it make sense, to use a slow wind on it? No, winding doesn't matter. If you're only coming close on the sims, then you're still not quite apples and apples. The real world differences are minuscule and related to things like tiny differences in end turn losses. What ...
by John in CR
Sep 29 2020 10:42pm
Forum: Alternative Energy
Topic: Don't we all wish we had this on our property
Replies: 10
Views: 1060

Re: Don't we all wish we had this on our property

A new friend who want my help building a high powered ebike is also working on a hydroelectric project on his dairy farm that has an electric bill of over $1000/mo. It's up in the mountains at 4,000m of elevation and he has a small river with year-round flow and a whopping 200m of head :shock: . Ev...
by John in CR
Sep 29 2020 12:48pm
Forum: E-Bike General Discussion
Topic: Leafmotor project
Replies: 60
Views: 1259

Re: Leafmotor project

Guys, you are wasting everyone's time by using apples and oranges comparisons to support your erroneous conclusions, No, that's what you're doing when you prescribe a different controller and battery for every different application, along with wheel sizes no normal adult bike was designed to use. P...
by John in CR
Sep 29 2020 12:42pm
Forum: E-Bike General Discussion
Topic: Leafmotor project
Replies: 60
Views: 1259

Re: Leafmotor project

since slow wind motor versions are more easily pushed into heat failure. We should be able to see this in the simulator, with the right parameters. Various hub motors represented there in multiple windings. When I try it, the slow winds look good on a 26" wheel. That makes sense to me - I don't kno...
by John in CR
Sep 29 2020 12:23pm
Forum: E-Bike Technical
Topic: FEM Dropout analysis - max force ?
Replies: 18
Views: 494

Re: FEM Dropout analysis - max force ?

- So just adding a small clamping bolt increases torque handling from 35Nm to 60Nm - nearly double. "Nearly double" is not anywhere close to the real world benefit. There is never precision machining of the dropouts to the axle size, and a press fit would be impractical anyway, so there is always p...