Search found 14529 matches

by John in CR
Apr 13 2021 1:39am
Forum: EBike General Discussion
Topic: Hardware for a 120Volt 20ha series?
Replies: 11
Views: 293

Re: Hardware for a 120Volt 20ha series?

Forget the gasser unless you need more than 80-100km non-stop range. What is exactly what i need. I'm gonna be doing thousands of miles. It's my main mode of transport. I dont drive cars I havent driven a car in 16 years with the exception of re-upping my drivers license since I moved to another st...
by John in CR
Apr 09 2021 9:59am
Forum: EBike Technical
Topic: Modifying a Hub Motor
Replies: 38
Views: 959

Re: Modifying a Hub Motor

You can't rewind a motor to make it able to make more torque at any voltage. A rewind accomplishes nothing that you can't accomplish by changing the voltage and current, unless you are able to fit more total copper around the stator teeth than the factory. If you want better performance from the sam...
by John in CR
Apr 09 2021 9:40am
Forum: EBike General Discussion
Topic: Hardware for a 120Volt 20ha series?
Replies: 11
Views: 293

Re: Hardware for a 120Volt 20ha series?

Forget the gasser unless you need more than 80-100km non-stop range. Then just get a real motor and boost your performance to exceed the gasser. I embarrass gassers every time I ride my ebikes and would never consider buying one of those smoke belching, noise making maintenance hogs.
by John in CR
Apr 05 2021 1:35am
Forum: General Discussion
Topic: Lightweighting and aerodynamic optimization of a subcompact car.
Replies: 72
Views: 1159

Re: Lightweighting and aerodynamic optimization of a subcompact car.

You know about golf ball dimples and how they help the golf ball fly further. Well, you can gain 14% fuel mileage with a dimpled car. :shock: https://youtu.be/8wG-gr_IRHQ?t=322 8) I've often wondered about dimpled surfaces for planes, cars, and boats to reduce drag, because when I was on the water ...
by John in CR
Mar 29 2021 6:30pm
Forum: Health and Food
Topic: What did you cook today??
Replies: 286
Views: 38317

Re: What did you cook today??

Sorry I'm just not into whether food looks pretty, so it's unlikely I'll post pics. Tonight is a special treat that you'll have to picture in your mind how good it will taste, and that's chicken hearts and livers with bacon en brochette with lots of veggies to go with it...sauteed bok choy, big leaf...
by John in CR
Mar 24 2021 7:58pm
Forum: EScooters/EMotorcycles
Topic: 260v Dirt Bike 2021
Replies: 37
Views: 1165

Re: 260v Dirt Bike 2021

Wouldn't there be less current draw? Yes, but so what. If you ust take the same battery and divide it into 4 65V packs and put them in parallel required for the same power at 4X the current. With the packs paralleled at the cell level the battery will be under the same stress, but will arguably be ...
by John in CR
Mar 21 2021 10:46am
Forum: Motor Technology
Topic: Hub motor rewinding, what thickness of enamelled copper wire?
Replies: 25
Views: 936

Re: Hub motor rewinding, what thickness of enamelled copper wire?

If you overheated a motor already, then the only way to get better performance is to increase cooling, change how your ride to make less heat, and/or include temperature sensing so your controller will automatically cut back current at a given motor temp and cut power completely if temps continue t...
by John in CR
Mar 14 2021 12:03pm
Forum: Motor Technology
Topic: Hub motor rewinding, what thickness of enamelled copper wire?
Replies: 25
Views: 936

Re: Hub motor rewinding, what thickness of enamelled copper wire?

If you overheated a motor already, then the only way to get better performance is to increase cooling, change how your ride to make less heat, and/or include temperature sensing so your controller will automatically cut back current at a given motor temp and cut power completely if temps continue to...
by John in CR
Feb 16 2021 6:57pm
Forum: EBike Troubleshooting
Topic: Key switch for 85V and 10A
Replies: 7
Views: 280

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: 280

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: 674

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: 63
Views: 1680

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: 63
Views: 1680

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: 645

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: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1963
Views: 254008

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: 744

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: EScooters/EMotorcycles
Topic: Qs 138 90H at 120 volts
Replies: 2
Views: 371

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: EScooters/EMotorcycles
Topic: Denzel Rush4?
Replies: 10
Views: 684

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: 1197

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: 24
Views: 2571

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: 527

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: 527

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: 76
Views: 3236

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: 639

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: 832

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...