Search found 14471 matches

by John in CR
Oct 15 2020 12:06am
Forum: E-Bike General Discussion
Topic: Muxus 3,000 v3 3t or Qs 3,000 v3 3t
Replies: 26
Views: 585

Re: Muxus 3,000 v3 3t or Qs 3,000 v3 3t

JohnCR how many kilowatts of battery do you have and is it all stored in a bunker ? I don't know...never added it up, but about 50kwh not yet in service. They're all in the shipping crates they came in with all balance tap harnesses and power mains removed. I check everything for balance and proper...
by John in CR
Oct 14 2020 8:30am
Forum: E-Bike Technical
Topic: Hub motor on 17" moped rim
Replies: 19
Views: 443

Re: Hub motor on 17" moped rim

+1 If you really want an improvement in every possible way, unbolt that stinky, noisy, under-powered ICE motor that spits out more pollution than a car engine, and replace it with an electric motor. I assure you that once you experience it, you'll start figuring out cool ways to convert your mopeds ...
by John in CR
Oct 14 2020 7:20am
Forum: E-Bike Technical
Topic: Pairing controller to new 1kW DD motor
Replies: 20
Views: 499

Re: Pairing controller to new 1kW DD motor

Assuming the controller isn't made for a proprietary motor where they use some trickery (like messing with the timing using the hall placement) to force you to buy replacement controllers from them, then ... Based on how the scooter works (on the videos), I wonder if there is some trickery to overc...
by John in CR
Oct 14 2020 7:05am
Forum: E-Bike General Discussion
Topic: Muxus 3,000 v3 3t or Qs 3,000 v3 3t
Replies: 26
Views: 585

Re: Muxus 3,000 v3 3t or Qs 3,000 v3 3t

Yep. With a powerful mid drive, you dont have to care about the weight anymore. Well, not as much at least. For sport riding, it is wonderful to have a powerful bike that is half your own weight. When it is your game you don’t really care about the cost. But, for transportation and/or long range yo...
by John in CR
Oct 13 2020 9:22pm
Forum: E-Bike Technical
Topic: How many magnets in a 20 in wheel
Replies: 4
Views: 153

Re: How many magnets in a 20 in wheel

I believe that 23 pole pairs is the most common for direct drive hubmotors, so 46 magnets is the one I'd try.
by John in CR
Oct 13 2020 9:19pm
Forum: E-Bike Technical
Topic: Pairing controller to new 1kW DD motor
Replies: 20
Views: 499

Re: Pairing controller to new 1kW DD motor

First, never ever go about the wiring config using the try all 36 combos route. It's totally unnecessary and greatly increases the likelihood of bad connections during the process leading to faulty conclusions. eg Look out for those common cheap hall connectors where one of the blades slides off to ...
by John in CR
Oct 13 2020 8:07pm
Forum: E-Bike General Discussion
Topic: Muxus 3,000 v3 3t or Qs 3,000 v3 3t
Replies: 26
Views: 585

Re: Muxus 3,000 v3 3t or Qs 3,000 v3 3t

I'm tired of all the weight I have been lugging around. You need to figure out that mid-drive. Otherwise you gotta do like MadRhino and spend the bucks to get all lightweight bike parts, get the strong DH frames, and tune and maintain them properly. Why is weight that big a problem? Do your wheels ...
by John in CR
Oct 13 2020 11:10am
Forum: E-Bike Technical
Topic: Dumpster find: how can I test/operate the motor?
Replies: 14
Views: 390

Re: Dumpster find: how can I test/operate the motor?

Great, no shorts in the phase wires. Doing the halls is simple, not something to try to avoid. Sensorless control only works reasonably well if you get the bike going with the pedals first. Just connect the hall wires too, taking care that the negative (black on every controller I've seen) and +5V (...
by John in CR
Oct 11 2020 9:01pm
Forum: E-Bike Technical
Topic: Dumpster find: how can I test/operate the motor?
Replies: 14
Views: 390

Re: Dumpster find: how can I test/operate the motor?

Even before testing halls, I would do a simple test to make sure there's no short in the phase wires, which would be a repair only for the truly dedicated who place a low value on their time or just like spending it that way. To test for a phase short, clamp the axle in a vise and turn the wheel. Th...
by John in CR
Oct 11 2020 8:35pm
Forum: E-Bike General Discussion
Topic: Muxus 3,000 v3 3t or Qs 3,000 v3 3t
Replies: 26
Views: 585

Re: Muxus 3,000 v3 3t or Qs 3,000 v3 3t

Despite the greater weight, the QS would be better at slow climbs up sandy beach trails, because the QS is 11% more motor. Note that if you go with the MXUS you'd make the same heat any time you're making the same torque. Slow climbs are the hardest thing for our systems, so to avoid yet another bur...
by John in CR
Oct 11 2020 8:19pm
Forum: E-Bike General Discussion
Topic: Muxus 3,000 v3 3t or Qs 3,000 v3 3t
Replies: 26
Views: 585

Re: Muxus 3,000 v3 3t or Qs 3,000 v3 3t

I do have one on my muxus v3 4t but not hooked up. The muxus v3 3t would need one with 18fet P.V. @ 80amps 80v.. A 3 turn motor has less need of a temp sensor than it's 4 turn counterpart, because the 3t can handle proportionately higher current due to shorter thicker copper, so it makes less heat ...
by John in CR
Oct 11 2020 8:13pm
Forum: E-Bike General Discussion
Topic: 18 vs 19 inch for ebike rims and tyres?
Replies: 4
Views: 210

Re: 18 vs 19 inch for ebike rims and tyres?

Smaller diameter on a hubmotor provides more acceleration, better climbing, greater efficiency (cooler motor and greater range), and not necessarily a lower top speed due to running cooler, at higher efficiency and a lower ride height. That means if you can make a 17" work for you it would be even b...
by John in CR
Oct 11 2020 5:28pm
Forum: Battery Technology
Topic: Sony VTC6
Replies: 11
Views: 504

Re: Sony VTC6

AFAIC the Sony VTC series are the best 18650's for ebikes. I still have some first gen VTC's I harvested from Makita tool pack warranty returns from DrBass that I bought back in 2008 and 2009 that are still in daily use. Sure they sag like hell because they're so worn but they still work fine runnin...
by John in CR
Oct 11 2020 5:19pm
Forum: Battery Technology
Topic: Split ebike battery
Replies: 66
Views: 1630

Re: Split ebike battery

I've done saddlebag-like batteries over the top tube on a couple of bikes, and while it works fine they can get in the way and it's hard to make look good. You have a pretty big triangle area, so I'd put the pack there if possible, and the little bit that doesn't fit I would put on top of the top tu...
by John in CR
Oct 11 2020 2:55pm
Forum: Battery Technology
Topic: Split ebike battery
Replies: 66
Views: 1630

Re: Split ebike battery

Be sure not to make the series connection like in your pic with cell 7+ wired to cell 8+.
by John in CR
Oct 10 2020 6:49am
Forum: E-Bike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 393
Views: 38852

Re: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

It's pole pairs, not poles, the correct number is needed. If it was 24 poles on something else, then it's 12 pairs for the Nuc, not 4
by John in CR
Oct 10 2020 2:37am
Forum: E-Bike Technical
Topic: Analysis of regen on an ebike
Replies: 151
Views: 52829

Re: Analysis of regen on an ebike

So the question is "which uses more energy" overall. The answer is it depends: Assuming no use mechanical brakes for either and no significant extra tire friction going around curves coming down fast, then which is more efficient will depend upon how fast you go coasting down with no regen along wi...
by John in CR
Oct 08 2020 5:05pm
Forum: E-Bike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 393
Views: 38852

Re: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

Hello all I was just wondering if I could get a little help. I just purchased a Nucular 6f and got it all set up today. I am using a cyclone 3000w motor and 72v battery. the problem is when I start to pull away the motor stutters, it only happens on very low throttle. is there some setting somewher...
by John in CR
Oct 06 2020 5:36pm
Forum: Electric Aircraft
Topic: Exhaust fan on velomobile doubling as propulsion
Replies: 20
Views: 795

Re: Exhaust fan on velomobile doubling as propulsion

Sure get some ventilation with intake and the front and exhaust out the rear. You might even be able to get a miniscule amount of thrust from something effective, but don't go for meaningful propulsion because it would be too noisy especially since interior noise is already an issue with velos.
by John in CR
Oct 06 2020 5:22pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Around the world on a solar ebike
Replies: 321
Views: 49450

Re: Around the world on a solar ebike

Since Alaska isn't another country, just call that a practice run. Then you and your bike can take a boat and bypass Canada, so the virus doesn't impede some real progress. Take a month or 2 to see Alaska by bike in late May or early June and get that advantage of very long days with your solar pane...
by John in CR
Oct 06 2020 12:29pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Denzel 72v 4-spd Gearbox Build 125cc Dual Sport
Replies: 107
Views: 13326

Re: Denzel 72v 4-spd Gearbox Build 125cc Dual Sport

The overheating means you need a smaller rear sprocket, not a larger one. You seem to keep forgetting that it's a relatively low power motor in that casing. What's the no-load current of the entire drive train in low gear vs high gear? edit: I do own the new LRHDD XL motor that is a beast and same ...
by John in CR
Oct 05 2020 11:15pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Around the world on a solar ebike
Replies: 321
Views: 49450

Re: Around the world on a solar ebike

What do you guys want to know? Just one question. When you gonna get out of that fire infested hellhole and get on the road? It's been 2.5 years of analysis, so time to come out of the analysis paralysis phase and do it. I've been waiting on the message "John I should be hitting CR on about X date,...
by John in CR
Oct 05 2020 7:14pm
Forum: Motor Technology
Topic: FOC for power and SOC (Stator Oriented Control) for regen?
Replies: 6
Views: 526

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

Simply put, for highest efficiency cos(phi) has to be 1 for the device receiving the power. So during accelleration this means FOC (as the motor receives the power) and during regen it has to be SOC (as the battery receives the power). The (now open source) Lebowski controller has FOC for powering ...
by John in CR
Oct 05 2020 11:04am
Forum: E-Bike General Discussion
Topic: New 1000w Geared hub MXUS XFC19
Replies: 74
Views: 5691

Re: New 1000w Geared hub MXUS XFC19

It would fly on 72v. Going to 60V or 72V with any bicycle geared hubbie is playing with fire. IME the gears can't handle the rpm, and even if they did the motor can't produce the power to cut through the wind at the higher speed. I have seen one emoto running a geared hubbie, but I haven't been abl...
by John in CR
Oct 04 2020 10:08pm
Forum: Motor Technology
Topic: FOC for power and SOC (Stator Oriented Control) for regen?
Replies: 6
Views: 526

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

I assume you are running 2 controllers so each has 3 phases. What is the motor you are using for this, The same motors I've been running for 8 years...HubMonster and MidMonster, very high efficiency hubmotors that have been out of production for about 6 years. Both are 20 magnet 24 slot motors woun...