Search found 261 matches

by JackFlorey
Jun 11 2021 12:23pm
Forum: EBike Technical
Topic: Placement of thermistor
Replies: 2
Views: 65

Placement of thermistor

Where's the best place to put a thermistor in a DD hub? I have a Shengyi from a RadBikes here (see picture) and I want to add a thermistor since I will be pushing the hub harder than its rated power. I assume closest to the winding is ideal. So perhaps the exposed lamination just beneath the winding...
by JackFlorey
Jun 09 2021 5:13pm
Forum: General Discussion
Topic: PIF (pay it foward) FREE 48V meanwell clone
Replies: 1
Views: 41

Re: PIF (pay it foward) FREE 48V meanwell clone

I don't need one but kudos for giving it away to someone who needs it!
by JackFlorey
Jun 09 2021 11:35am
Forum: EBike Technical
Topic: Standard phasing/color coding question
Replies: 2
Views: 71

Re: Standard phasing/color coding question

Does anyone have something like a scope plot that shows the "standard" phasing for three phase sensored motors? OK looks like no one does, so I did it myself. Plot below. Top three are the phase connections themselves. They are all connected to ground via 220 ohm resistors to provide a gr...
by JackFlorey
Jun 09 2021 11:19am
Forum: EBike General Discussion
Topic: The ideal hubmotor
Replies: 16
Views: 436

Re: The ideal hubmotor

integrated hub + 1500w is not possible. That motor would use the axle of the igh as main stator support, and easily dammage it at those power levels, since it's only slotted 10mm steel; not even 12mm like most chinese hub motors. Why couldn't an IGH use 12mm axles? I think the ideal hub should get ...
by JackFlorey
Jun 08 2021 10:47pm
Forum: EBike General Discussion
Topic: The ideal hubmotor
Replies: 16
Views: 436

Re: The ideal hubmotor

E-HP wrote:
Jun 08 2021 10:31pm
8 integrated, plus a cassette?
No, was mixing two different ideals there! Will fix.
by JackFlorey
Jun 08 2021 9:53pm
Forum: EBike General Discussion
Topic: The ideal hubmotor
Replies: 16
Views: 436

The ideal hubmotor

In another thread people were talking about what the ideal hubmotor would be. It's going to vary with application of course but for me the 'sweet spot' would be: -Sensored BLDC -Geared motor for lower weight -Magnetic particle clutch (for regen when desired) -Integrated gear hub with 7-8 speeds (i.e...
by JackFlorey
Jun 08 2021 4:55pm
Forum: EBike General Discussion
Topic: Help decide between All-Axle and GMAC
Replies: 38
Views: 691

Re: Help decide between All-Axle and GMAC

I want them to be competitive and fight for it. I don't. I want them to continue spending money on development (CA, Phaserunner, All-Axle, that stackable battery) service (the hundreds of how-to videos and the rapid turnaround on problems) and general ebike support (i.e. this website.) I greatly pr...
by JackFlorey
Jun 08 2021 4:50pm
Forum: EBike General Discussion
Topic: Help decide between All-Axle and GMAC
Replies: 38
Views: 691

Re: Help decide between All-Axle and GMAC

Yeah, I guess my dilemma boils down to front vs rear. I am not sure what I want. I thought I preferred the Front since it just seems easier to install and spreads the weight around. My only worry is doing 5km stretches of 7%. The reason I was thinking rear hub was because it seems to be common advi...
by JackFlorey
Jun 08 2021 1:23pm
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8249

Re: Charging LTO at Max Speed?

2. What is so inherently dangerous about charging inside? This chemistry basically can't catch on fire from my understanding, whether from overcharging, heat, puncture etc. At those power levels, even something like a marginal connection can start a fire due to the tremendous amounts of heat that c...
by JackFlorey
Jun 08 2021 12:54pm
Forum: EBike Technical
Topic: Standard phasing/color coding question
Replies: 2
Views: 71

Standard phasing/color coding question

Hey all. I have a Radcity bike here and I'm replacing the controller to see what I can get out of the motor. Does anyone have something like a scope plot that shows the "standard" phasing for three phase sensored motors? i.e. this is what the voltages look like on the three phases vs this ...
by JackFlorey
Jun 08 2021 12:09pm
Forum: Battery Technology
Topic: The Cycle Satiator, universal charger for the enthusiasts
Replies: 852
Views: 155122

Re: The Cycle Satiator, universal charger for the enthusiasts

You can use it using the "force start" feature. You can set up termination criteria that are never met to ensure it doesn't power off prematurely. Dumb question - why don't you just use the Satiator to charge your battery? Is the charge voltage below 12 volts? Even 3S batteries are 12.6V.
by JackFlorey
Jun 05 2021 7:52pm
Forum: EBike General Discussion
Topic: Help decide between All-Axle and GMAC
Replies: 38
Views: 691

Re: Help decide between All-Axle and GMAC

The lower turn-count uses thicker wire, and shorter windings, so it has less resistance. But also less torque at the same current. There is no difference in power handling between them; the only real difference it makes is in top speed vs. battery voltage. The simulator is a good way to see what so...
by JackFlorey
Jun 05 2021 12:17am
Forum: Battery Technology
Topic: The case for using Supercapacitors with Lithium-Ion batteries in EV's
Replies: 19
Views: 422

Re: The case for using Supercapacitors with Lithium-Ion batteries in EV's

Batteries are energy dense devices and should never be compared to a Power dense device like a Supercapacitor, they are just not the same thing... Agreed. But people want energy dense systems, not power dense systems. You cannot physically accelerate faster than about 2G's with tires, so more power...
by JackFlorey
Jun 04 2021 5:53pm
Forum: EBike General Discussion
Topic: Help decide between All-Axle and GMAC
Replies: 38
Views: 691

Re: Help decide between All-Axle and GMAC

So far I have decided on a 36V 17Ah battery with a Baserunner. I am caught between the Grin All Axle and the GMAC. Would the All Axle be good enough for what I want to do? Is the GMAC just the obvious choice for me? I think it depends on whether you want to do a rear hub or a front hub. Front hub -...
by JackFlorey
Jun 04 2021 4:45pm
Forum: Large EV General Discussion
Topic: Ford etruck F-150 Lighting - Opinions?-
Replies: 80
Views: 1357

Re: Ford etruck F-150 Lighting - Opinions?-

Yea, ..it would probably be cheaper to give all the electricity consumers on Kauai one of these Ford etrucks, rather than spending the millions $$’s planned on the Solar + battery + pumped Hydro scheme needed for the next RE storage upgrade step on the island. Figure you're taking the piss, but tha...
by JackFlorey
Jun 04 2021 2:20pm
Forum: Items Wanted
Topic: Wanted - Julet Z916 controller side connector
Replies: 0
Views: 57

Wanted - Julet Z916 controller side connector

Anyone have one, or know of a source for one? It's the one with the female receptacles for the three phase pins. If anyone has a broken controller that has this connector on it I'd be happy to take that off your hands, too.
by JackFlorey
Jun 04 2021 2:00pm
Forum: EBike General Discussion
Topic: Why do I now ride my ebike with light motorcycle gear?
Replies: 58
Views: 1102

Re: Why do I now ride my ebike with light motorcycle gear?

Now, that number is horse puckey. But let's assume it's true. The fact that fatality rates for cyclists don't change with the broad adoption of helmets would then imply that wearing one makes you 13 times more likely to be in an accident. Nope. There's no data that supports that. In NYC, 97% of bik...
by JackFlorey
Jun 04 2021 12:44pm
Forum: EBike General Discussion
Topic: Why do I now ride my ebike with light motorcycle gear?
Replies: 58
Views: 1102

Re: Why do I now ride my ebike with light motorcycle gear?

If you wear a helmet to ride a bicycle, but not to climb ladders or stairs, drive a car, or take a shower, you have a faulty understanding of the relative risks involved. If you wear a helmet to bicycle, but don't skydive because you think it's dangerous/scary, you have a faulty understanding of th...
by JackFlorey
Jun 02 2021 7:05pm
Forum: Alternative Energy
Topic: Quick test for solar range extender
Replies: 2
Views: 103

Quick test for solar range extender

Just did a quick test with the simplest possible solar range extender - a single panel bolted to the rack. I used a Renogy 100W flexible panel on top of a 1/4" piece of plywood, bolted to the rack of an almost-stock RadCity. A Genasun controller converted the 18V from the panel to the 54.6V the...
by JackFlorey
Jun 02 2021 11:48am
Forum: Battery Technology
Topic: Temporary precharge circuit
Replies: 11
Views: 259

Re: Temporary precharge circuit

Too high precharge resistance and precharge will take longer than your patience (it will always precharge enough with time) Unfortunately not always. All controllers have a quiescent current draw - the current drawn by the processor, gate drivers, display etc. If the draw is high enough, and the re...
by JackFlorey
Jun 01 2021 11:29pm
Forum: Battery Technology
Topic: Temporary precharge circuit
Replies: 11
Views: 259

Re: Temporary precharge circuit

Yermommy wrote:
Jun 01 2021 10:57am
Can I place this 10w precharge resistor in between the positive wire like shown below?
Depends on the resistance, of course. Too low a resistance and you will still trigger short protection; too high and you won't precharge enough.
by JackFlorey
May 29 2021 1:03pm
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 63
Views: 8350

Re: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor

Until battery tech/ (energy density)..”tx Ocean Solar” will be little more than a demo exercise for the rich. I suspect Wind will remain the dominant fuel for ocean racing for a long time yet. Agreed. Solar will provide motive power for windless days and for house loads, but most of the energy will...
by JackFlorey
May 24 2021 6:10pm
Forum: Large EV General Discussion
Topic: Ford etruck F-150 Lighting - Opinions?-
Replies: 80
Views: 1357

Re: Ford etruck F-150 Lighting - Opinions?-

And equally facinating that you avoided the part where he suggested you could get a “free” charge from that cheap , ...(but not without some cost ? ) ,..solar system. Maybe you can explain how that works ? Sure. You get a cheap solar power system. It lasts decades. Then you use the power. Unlike us...
by JackFlorey
May 24 2021 11:23am
Forum: EBike General Discussion
Topic: RadPowerBike RadCity Commuter
Replies: 191
Views: 12625

Re: RadPowerBike RadCity Commuter

Sorry if this has been answered already -

What motor does the RadCity Commuter (v4) use?
by JackFlorey
May 24 2021 11:14am
Forum: EBike Troubleshooting
Topic: Trailer build
Replies: 18
Views: 281

Re: Trailer build

Both are rotating the hub motor in the same fashion, just one is using wind and one is using the friction of the trailer tire moving on the ground. It wouldn't be effecting my main motor in anyway, it's a secondary motor that would be hooked to the drivetrain on the trailer and could potentially be...