Search found 14545 matches

by John in CR
Feb 16 2021 6:57pm
Forum: EBike Troubleshooting
Topic: Key switch for 85V and 10A
Replies: 7
Views: 200

Re: Key switch for 85V and 10A

I never use those ebike key switches integrated with the throttle, because I personally don't like running pack voltage up to the handlebars. Plus while those wires may be capable of the 200mA or less needed to turn the controller on, I doubt the wire gauge going to that switch is capable of handlin...
by John in CR
Feb 15 2021 12:39pm
Forum: EBike Troubleshooting
Topic: Key switch for 85V and 10A
Replies: 7
Views: 200

Re: Key switch for 85V and 10A

I've used cheap motorcycle keyswitches on all my ebikes since 2008 without issue, most with max voltages of 83V or 87V but some with 128V fresh off the chargers. Something like this https://www.amazon.com/QAZAKY-Ignition-Replacement-Scooter-Chinese/dp/B00MY5MQ6A/ref=sr_1_21?dchild=1&keywords=Mot...
by John in CR
Feb 12 2021 1:28am
Forum: EV Business World
Topic: Toyota’s Solid State EV battery
Replies: 2
Views: 615

Re: Toyota’s Solid State EV battery

The Toecutter wrote:
Jan 07 2021 10:47pm
...we may get something closer to 600 Wh/kg
That kind of talk will give me wet dreams about the bikes I can build.
by John in CR
Feb 07 2021 8:15pm
Forum: Electric Watercraft
Topic: Getting Into Electric Power Catamarans
Replies: 52
Views: 1115

Re: Getting Into Electric Power Catamarans

Before deciding anything about the electric powerplant you've got to get your hull design down. For 20mph, which is 17.4 knots, you'll need a planing hull design, which is more difficult to achieve with a catamaran. Planing hull cats are more typically for achieving greater stability while fishing ...
by John in CR
Feb 06 2021 12:55pm
Forum: Electric Watercraft
Topic: Getting Into Electric Power Catamarans
Replies: 52
Views: 1115

Re: Getting Into Electric Power Catamarans

Before deciding anything about the electric powerplant you've got to get your hull design down. For 20mph, which is 17.4 knots, you'll need a planing hull design, which is more difficult to achieve with a catamaran. Planing hull cats are more typically for achieving greater stability while fishing a...
by John in CR
Jan 18 2021 2:23pm
Forum: Motor Technology
Topic: Hub motor with dual set of phase wires
Replies: 6
Views: 624

Re: Hub motor with dual set of phase wires

Measure the 2 sets of phase wire for continuity with each other. If you have 2 completely separate sets of phase wire and 2 sets of halls, then you can run 2 controllers, though it can be difficult to figure out which set of halls goes with which set of phase wires in those 6 phase motors. If there ...
by John in CR
Jan 18 2021 1:59pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1928
Views: 250379

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

Going out on a limb here. All are FOC that I have looked at . Phaserunner is from the ASI 800, that should cover a lot if not most E-bikes. Only reason for me wanting ASI 2000 is not running to the limits of the controller. At the moment with my single batter limited to 36 amps (not peak) as not to...
by John in CR
Jan 13 2021 3:30am
Forum: Motor Technology
Topic: KBL96251 trouble (24" 2x Motor bike build)
Replies: 31
Views: 684

Re: Kelly KBL 96251 and QS V3 273 trouble

Thanks but there are just a very few parameters to adjust in KBL software... I bought the 5T motor. I have also tested my other controller on the QS motor, with kelly controller connected to my front motor, and even when I spin my QS motor with the other controller the kelly controller gets 3-2 err...
by John in CR
Dec 31 2020 5:11pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Qs 138 90H at 120 volts
Replies: 2
Views: 336

Re: Qs 138 90H at 120 volts

Since it's an inrunner, then you'd be relying on the motor being sufficiently over-engineered to handle the extra rpm without flying apart. It's only a good idea depending on how it is used. If you do a lot of relatively high speed cruising, then no it's probably not a good idea, since those extra c...
by John in CR
Dec 31 2020 4:56pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Denzel Rush4?
Replies: 10
Views: 646

Re: Denzel Rush4?

ZeroEm wrote:
Nov 03 2020 4:16pm
My 48ah 72V battery cost $1,800 USD
My 52ah 78V nominal battery cost less than $500 including shipping not including a bit of elbow grease.
by John in CR
Dec 31 2020 4:51pm
Forum: EVents
Topic: eBike OffRoad race format
Replies: 15
Views: 1093

Re: eBike OffRoad race format

The ride+race format is something I'd considered. Here's an idea for the hopper. I have a good friend here in Costa Rica who's been into ebikes for 20 years and solar power and green energy for longer than that. He has a property with a kilometer of beachfront on the Gulf of Nicoya. The property ha...
by John in CR
Dec 31 2020 12:25pm
Forum: EBike Build Threads
Topic: 5kW ebike motor / controller testing
Replies: 22
Views: 2139

Re: 5kW ebike motor / controller testing

A lot of great work so far. Before final assembly be sure to get all of the frame measurements so that once you get that bike rolling you can do it right and build an AL frame to match your swingarm that incorporates the battery box for much more battery room with a smaller exterior form. I'd be ver...
by John in CR
Dec 05 2020 2:58am
Forum: Motor Technology
Topic: repair/center a wobbling hubmotor
Replies: 20
Views: 487

Re: repair/center a wobbling hubmotor

I'm already in contact with aliexpress to get a solution... But ist not that easy with them :wink: That's a waste of time, because you'd have to pay for shipping it back. You're likely to have more luck being more flexible directly with the seller where you pay something. eg The shipping for a new ...
by John in CR
Dec 05 2020 2:49am
Forum: Motor Technology
Topic: repair/center a wobbling hubmotor
Replies: 20
Views: 487

Re: repair/center a wobbling hubmotor

The rotor is the part of the motor that spins. For a DD hubbie like yours it is the entire outside shell. Damaging the axle won't create a wobble, though it might make the rotor rub on part of the stator. The stator is the stationary part with the copper windings and the stationary axle runs through...
by John in CR
Dec 03 2020 10:22pm
Forum: EBike Build Threads
Topic: Maxarya Ray 2 Semi Recumbent w/high efficiency mid drive
Replies: 57
Views: 2326

Re: Neppy's Maxarya Ray 2 Semi Recumbent

Cool bike, like the bikeE but more stylish and bigger front wheel. I like the battery room on top and bottom over the Cannondale, because if I ever build something like that, I'll want to be able to accommodate a big big battery to go forever.
by John in CR
Dec 03 2020 10:09pm
Forum: EBike Technical
Topic: New build issue
Replies: 22
Views: 630

Re: New build issue

You'd be dishing it by less than 1cm, which to me is a non-issue. With it on a trike, I don't think you'll lose enough lateral rigidity to make a difference, and I think Neptronix may have been looking at it wrong to bring up handling as an issue, since your plan is to put the tire right where it sh...
by John in CR
Dec 03 2020 9:28pm
Forum: EBike Technical
Topic: 3000W Sensorless Controller
Replies: 21
Views: 792

Re: 3000W Sensorless Controller

I've noticed how mellow Chalo's posts are, but he still gets his points across but in a more mellow way. :thumb: LOL, ya'll act like he was neutered or something. :lol: We all mellow with age, but anyone that couldn't handle the "old" Chalo need to grow a thicker skin. Good information so...
by John in CR
Dec 03 2020 5:07pm
Forum: Motor Technology
Topic: repair/center a wobbling hubmotor
Replies: 20
Views: 487

Re: repair/center a wobbling hubmotor

I don't think a bearing not pressed all the way in would do that. With the video my computer decompressed I couldn't tell how far off the motor was. Motor looked to spin pretty straight and only the brake disk was way off. If it's only the disc mount, you may be able to grind or file it more true, o...
by John in CR
Dec 03 2020 10:46am
Forum: Motor Technology
Topic: repair/center a wobbling hubmotor
Replies: 20
Views: 487

Re: repair/center a wobbling hubmotor

Yes, the Aliexpress looks like a MXUS 3k. My computer smashed your video strangely, so between the spoke flanges looked like about 100mm, and the brake disc appeared strangely spaced wide. For a motor itself to have wobble then one or both bearing cups in the side covers are not properly centered wh...
by John in CR
Dec 03 2020 4:20am
Forum: EBike Technical
Topic: 3000W Sensorless Controller
Replies: 21
Views: 792

Re: 3000W Sensorless Controller

Why use a hubbie that weighs 14.5kg without spokes, rim and tire, and under-utilize it? It's like buying a sports car and sticking a block of wood under the gas pedal to intentionally prevent using the car's potential. More like driving an empty truck to work and back every day. As so many do. True...
by John in CR
Dec 03 2020 3:54am
Forum: EBike Technical
Topic: 3000W Sensorless Controller
Replies: 21
Views: 792

Re: 3000W Sensorless Controller

Get an ebike tester first, or since that controller is so cheap get it too and keep it as backup later on after you get your motor running properly with a sufficient controller. Why use a hubbie that weighs 14.5kg without spokes, rim and tire, and under-utilize it? It's like buying a sports car and ...
by John in CR
Dec 02 2020 5:51pm
Forum: EBike Technical
Topic: 3000W Sensorless Controller
Replies: 21
Views: 792

Re: 3000W Sensorless Controller

Hello, what do you think about this controller? 72 V 80 Amp 24 mosfet, 3000w. Sensorless mode (WITHOUT HALL SENSORS) https://es.aliexpress.com/item/4001039692672.html?spm=a2g0s.9042311.0.0.5d1963c0D8vMGz Is it a good option? I have a 5000w motor hub. Will sensorless mode work fine? Thanks :) First,...
by John in CR
Dec 02 2020 5:44pm
Forum: EBike Technical
Topic: New Dual Motor DYI Bike Build - Questions
Replies: 2
Views: 197

Re: New Dual Motor DYI Bike Build - Questions

You need 2 controllers to run 2 motors. The Grin Tech website shows how to wire up 2wd to one throttle.
by John in CR
Dec 02 2020 5:39pm
Forum: EBike Technical
Topic: New build issue
Replies: 22
Views: 630

Re: New build issue

A few millimeters less washer to pit up a few mm of flex in the swingarm plus adjusting the derailleur may get you there. That's assuming it's AL. If it's steel then you can easily get the swingarm to the width you need at the dropouts. If I still couldn't get it there, then I'd either figure out ho...
by John in CR
Dec 02 2020 5:22pm
Forum: Motor Technology
Topic: repair/center a wobbling hubmotor
Replies: 20
Views: 487

Re: repair/center a wobbling hubmotor

First that's not a MXUS 3k Turbo unless they've been totally redesigned. 2nd, that brake disc is either not mounted correctly or the mount itself is not installed in the motor correctly. Are you sure the brake disc goes on that side? It seems to be strange out so far from the side cover. Is that a h...