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by amberwolf
Mar 26 2019 9:45pm
Forum: E-Bike Technical
Topic: Cooling Solutions?
Replies: 28
Views: 358

Re: Cooling Solutions?

Yup I have the cheap stock controller lol, don't think it has anything fancy going on in it. So when the controller shuts off when you're really hauling it it's probably because the controller senses the internal heat inside the casing is too high right? It's not for the motor? It's probably not ev...
by amberwolf
Mar 26 2019 12:40am
Forum: E-Bike Technical
Topic: Hall Sensors'b'Gone
Replies: 212
Views: 10133

Re: Hall Sensors'b'Gone

Axle repair has survived (without power) the normal commute abuse and a store trip with over 100lbs of groceries and stuff, for the past week or so. Had to do long-delayed yardwork on that "weekend", so had no time to work on the trike. Am hoping to do the new rewiring this wed or thurs, if nothing ...
by amberwolf
Mar 26 2019 12:11am
Forum: General Discussion
Topic: Amberwolf's Music Studio Technical Stuff
Replies: 68
Views: 7510

Re: Amberwolf's Music Studio Technical Stuff

I haven't got pics of my horrible dremeling job, :oops: but here's the present exterior stuff. First is the top, which is pretty much the way it's going to look even when complete. (someday I might paint it, maybe with doggie faces or something...I'd rather get someone to print me some color version...
by amberwolf
Mar 25 2019 11:10pm
Forum: Motor Technology
Topic: G-BLDC07H7 Wiring Diagram?
Replies: 1
Views: 33

Re: G-BLDC07H7 Wiring Diagram?

Never seen one like that before, other than some of the Sevcons (but those have to be specifically programmed for the motor they are being used with). A quick google finds some pages wiht it for sale, in Chinese, and a google translation, bad as it is, indicates that's not really an ebike controller...
by amberwolf
Mar 25 2019 10:32pm
Forum: E-Bike General Discussion
Topic: Saved by thumb throttle
Replies: 6
Views: 145

Re: Saved by thumb throttle

FWIW, I've disassembled a lot of (cheap) bikes, and a few middling-priced ones, that I've picked up over the years from thriftstores, garage sales, freecycle, etc., and a number of them have had blue loctite (or blue something) on the ends of various bolts, from the crank bolts to rim brake boss bol...
by amberwolf
Mar 25 2019 10:14pm
Forum: Alternative Energy
Topic: Solar Well Pump
Replies: 1
Views: 53

Re: Solar Well Pump

I am pretty sure I've seen someone on ES using such a timer, but I can't remember where. You could make such a timer fairly easily with a 555 timer chip and a current sensing shunt that simply triggers a comparator. The comparator detecting current flow then enables the timer chip in one-shot mode, ...
by amberwolf
Mar 25 2019 9:53pm
Forum: Battery Technology
Topic: AliExpress battery pack unboxing
Replies: 75
Views: 2777

Re: AliExpress battery pack unboxing

THere's two pack halves, right?

I'd put one in the core of each half, at minimum.

Then wherever else might get hot during charge or discharge that you would want to shut things down for (or whatever the BMS does when it senses overtemp).
by amberwolf
Mar 25 2019 9:49pm
Forum: Battery Technology
Topic: connections without DIY welding / soldering
Replies: 19
Views: 456

Re: connections without DIY welding / soldering

I assume the cylinder sides are never "live", including right down past the "shoulder", so adding per-cell heat shrink wrap is not needed? Not sure what you mean? If you mean the cell can itself, the entire can is always live, it's all the negative end of most cells (I think there was a cell out th...
by amberwolf
Mar 25 2019 9:21pm
Forum: E-Bike Technical
Topic: Cooling Solutions?
Replies: 28
Views: 358

Re: Cooling Solutions?

Okay, I've just always assumed that the controller will limit the rpm before it actually becomes dangerous for the motor, I guess not. Generic controllers genrally don't check or limit anything at all, other than battery current (and even that can be significantly different than what it's rated for...
by amberwolf
Mar 24 2019 11:16pm
Forum: Battery Technology
Topic: Have you seen negative voltage on cells?
Replies: 2
Views: 97

Re: Have you seen negative voltage on cells?

Couple of years ago or more, it happened to one of the EIG NMC cells I use, in my old lighting pack, which had been damaged by overdischarge (to zero) years before, then accidentally left running the lights again. I forget how far below zero it went, but it was puffed up, which has never happened to...
by amberwolf
Mar 24 2019 11:07pm
Forum: E-Bike Technical
Topic: Adding Pedal Assist option to motor controller...
Replies: 2
Views: 65

Re: Adding Pedal Assist option to motor controller...

One easy way to do it is to use the Cycle Analyst v3 from http://ebikes.ca . It takes your throttle and your PAS and uses them to create a throttle signal to send to the controller to make it do what you want. You can use a simple cadence PAS (like you probably have now) or a torque sensor. I would ...
by amberwolf
Mar 24 2019 10:24pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Music Barrel
Replies: 14
Views: 249

Re: Music Barrel

Chalo wrote:
Mar 24 2019 10:10pm
I made a bass amp out of a 20 liter heavy-walled plastic pail some years ago. I made a tuned port so it would be responsive down to 41hz (the lowest note of a bass guitar).
I'd need to make one tuned a little lower for the six string bass I'm working on learning to play a little. :)
by amberwolf
Mar 24 2019 10:11pm
Forum: E-Bike General Discussion
Topic: Any tips to power a bicycle with a hub motor from a scooter?
Replies: 13
Views: 270

Re: Any tips to power a bicycle with a hub motor from a scooter?

Electric Earth wrote:
Mar 22 2019 4:09pm
The easiest/cheapest thing might be to just get a really long fork for the bike and have a small front wheel?
And have a fun crash the first bump or pothole you hit with it? ;)
by amberwolf
Mar 24 2019 2:45am
Forum: E-Vehicles General Discussion
Topic: What does this charger behavior indicate?
Replies: 17
Views: 421

Re: What does this charger behavior indicate?

Unlikely. But if the current switching was happening at a high enough rate at the BMS port, perhaps it would cause the charger to display unintended and unexpected behavior?

It's part of why I wanted to scope the BMS port; especially the gate controls, and the cell sense wires.
by amberwolf
Mar 24 2019 12:30am
Forum: E-Bike Technical
Topic: Cooling Solutions?
Replies: 28
Views: 358

Re: Cooling Solutions?

Have you tried the suggestion I made in your other thread of looking at the various Cyclone cooling threads and posts? Or the ones for the RC motors? There is also the "definitive testing on heating and cooling of hubmotors" thread by Justin_LE, which has a number of cooling methods actually tested ...
by amberwolf
Mar 24 2019 12:18am
Forum: E-Vehicles General Discussion
Topic: Help rewiring a kids go kart
Replies: 5
Views: 157

Re: Help rewiring a kids go kart

The silver box to the right of the back wheel below the last battery is what I believe is the transformer/ regulator and it is this which I don’t think is working. I'm going to repeat what i asked before, that you have not yet answered. It is important if you want to get this working, without just ...
by amberwolf
Mar 23 2019 11:50pm
Forum: General Discussion
Topic: 29er ?
Replies: 7
Views: 213

Re: 29er ?

But the limit to 30mph, dose not work for me. Still looking for good tourque, but speed in short 10-15 mile range. And I'm 6'1 plan to modify for kiddo. Trailer is ok, but feel it best to do a rear saddle thing. Stuff on the rear of the bike that wiggles and moves is generally problematic, and is w...
by amberwolf
Mar 23 2019 11:40pm
Forum: Battery Technology
Topic: 26650 94v build questions!
Replies: 11
Views: 316

Re: 26650 94v build questions!

According to a google search, a number of sites show they are only 5Ah cells, not 20Ah.

They also say they are 50A (assuming short bursts), so I wouldn't try to pull 200A from one.
by amberwolf
Mar 23 2019 11:30pm
Forum: E-Vehicles General Discussion
Topic: What does this charger behavior indicate?
Replies: 17
Views: 421

Re: What does this charger behavior indicate?

I had that behavior with the Satiator trying to charge that Luna pack, and AFAICR it's the same thing that would sometimes happen to the pack's original owner with the charger that came with it. It could cause a power fault error in the Satiator, too. When I hooked the Satiator to the discharge port...
by amberwolf
Mar 23 2019 10:59am
Forum: Motor Technology
Topic: In search of the illusive High-Torque, Low-Speed hub motor
Replies: 8
Views: 239

Re: In search of the illusive High-Torque, Low-Speed hub motor

To get a particular speed at a particular voltage. To get a different inductance for controllers that need it for one reason or another. (some controllers don't do well with low inductance, for instance). Sometimes a different kV also means a significantly different amount of copper fill in a partic...
by amberwolf
Mar 23 2019 12:16am
Forum: E-Bike Technical
Topic: Rear Bafang hub motor speed hack?
Replies: 8
Views: 236

Re: Rear Bafang hub motor speed hack?

As it turns out the motor has a 36km/h (22mph) speed cap. Which I find pretty stupid. I have a 850c display in which I put the speed limit to 99kmph, but that changes nothing to the speed. So I’m guessing the speed cap is programmed in the controller ? Run the bike off ground (upside down, etc), so...
by amberwolf
Mar 22 2019 11:58pm
Forum: Motor Technology
Topic: In search of the illusive High-Torque, Low-Speed hub motor
Replies: 8
Views: 239

Re: In search of the illusive High-Torque, Low-Speed hub motor

According to a QS sales-rep: QS doesn't actually make any of their 205 motors with anything less than 9.03 Kv. (despite what it says on their website) So, the quest for the illusive high-torque, low-speed hub motor continues... Any suggestions? Buy one and rewind it for the kV you really want? It's...
by amberwolf
Mar 22 2019 11:33pm
Forum: E-Bike Non-hub Motor Drives
Topic: RV-160 Pro not running properly.
Replies: 2
Views: 138

Re: RV-160 Pro not running properly.

From what I've read here and there on ES, Revolt motors in general are not of great quality, either in design or build, and may have timing issues with the halls because of the sensor placement. You may still see the correct signal progression on the halls, but their timing relative to the phases ma...
by amberwolf
Mar 22 2019 11:20pm
Forum: General Discussion
Topic: 29er ?
Replies: 7
Views: 213

Re: 29er ?

But don't see any hub motors for 29 inch bikes. Perhaps the search engine you use doesn't work right. ;) There are a number of direct links in the search this links to, using your exact phrase above: https://www.google.com/search?q=hub+motors+for+29+inch+bikes If for some reason they don't come up ...
by amberwolf
Mar 22 2019 10:27pm
Forum: E-Bike General Discussion
Topic: I need a brake
Replies: 20
Views: 409

Re: I need a brake

https://imgur.com/a/Ue2KWKx Can't see that site. If you upload your images directly to the post, using the attachment tab, then anyone that can see the post can see the images. The rear of the bike lacks brake bosses. It only has them on the front. THen you already have them on the important wheel....