Endless Sphere

Sounds right, but the converter is not 100% efficient, so the current will be higher by the actual efficiency (could be anything from as low as 50% to as high as something in the 80s, maybe more). If there's no specs on any of that you might want to assume the worst case. Breakers usually have vario...

Yeah, it's something I discovered the same way Fechter did (in the link above), sometime in the 90s when I used to build scifi props for conventions and such...NiCd was the only rechargeable stuff I could find then, and it was way easier to seal them up in the props than make battery compartments a ...

What I do not understand is the crank gear of 10T is going to 1st IGH, with its "normal" operating gear of 20T and the IGH set to 75%, but then there is an added gear mounted on the flange. Different then the common Compound Gearing thats easily solvable. How does one finish the calculation? Not su...

36v 1000w brush-less motor (but it only has 2 wires?) That would probably be a brushed motor. If you apply power to the wires (like from a car battery) then the motor will spin at about 1/3 of the speed it would have with the original, if it is a brushed. Reversing the wires will reverse the direct...

There are a number of threads on how BMSs work, if you look thru this list: https://endless-sphere.com/forums/search.php?keywords=bms+work*&terms=all&author=&sc=1&sf=titleonly&sr=topics&sk=t&sd=d&st=0&ch=300&t=0&submit=Search Not everything is relevant, mostly easy to figure out by title. charging w...

These third shift goods aren’t counterfeits in the traditional sense of the word. OEMs use exactly the same materials and production processes to make additional products that are then sold through unauthorized channels. ...then the products will be of the same quality as those "OEMs" units from th...

I can't tell exactly because my wattmeter resets itself when the supply drops to zero. Most wattmeters I've seen have an Aux input for a battery to sustain them when mainpower is cut. (both teh WattsUps and Turnigy Watt Meters I have do..the Cycle Analysts don't need it cuz they save their data at ...

Since the wires broke, you'd have to repair the wires, either by splicing them back together (probably color to color), or by replacing the entire cable that contains the broken wires. Once the wires are repaired, then anything else that is not working can be troubleshot (you'd just have to report b...

It's a pain since the spokes have to be removed and you need a 3 jaw puller. You find instructions and photos if you search this forum. Somewhere in my posts is a thread about one of the UUmotors off a stromer, that opens like this, showing takeapart, including internal pics/etc. I suspect it's int...

THe problems with motors in the trailer are (besides lack of time to experiment) one of the main reasons I have not yet added motors to any of my trailers, and instead just use massive motors in the cargo bike and trike, which are sufficient to pull several hundred pounds of dogs, dog food, or a pia...

In order for me to have the cutout switches, I have to install the levers that came with my hub motor. Nope. You can buy off the shelf solutions like: HWBS (hidden wire brake switch; not directly compatible with existing wiring on all controllers, might require opening the controller to add wires) ...

You could check with your local powerchair / medical supply places and see if they have old dead SLA you could rip the guts out of. UPS/server backup power units also use them, so places that service those may also have them. Local recyclers may have piles as well. You can fabricate shells in a numb...

To use the firmware, the thing that is important is the manufacturer of the controller and the MCU/etc they used. To find out if yours is compatible, look up Casainho's posts to find the threads about the new firmware.

I actually have the same problem but I am doing a gas generator (38cc 4-stroke motor). You can also split the output from each 36V battery into parrelel connectors and then hook one connection for the serial 72V and the other to the solar charger. Like this diagram. Confirm this though I am not the...

I have 2 36v packs that terminate into a Anderson plug that has 4 connector . I then have a matching 4 connector Anderson plug that series the two 36v packs to 72v that goes to the controller . I made a charge plug that plugs into the 36v packs that parallels the 2 packs to one . So when I what 72v...

I'm so tired right now that I'm probably either just being stupid or misunderstanding the drawing, but isn't that actually the *rotor* plate? It looks kinda like it has stacks of magnets with a spot for a set screw at the top (outer circumference)...but I can't be sure. The stator has all the windin...

No, because the CA is what's doing the limiting/etc. It's a microcomputer. It doesn't matter what controller it's used with--it works with all of them the same way. The dumber the controller, the better, so you don't have to mess with two sets of settings to get it working the way you want. (setting...

The simplest method to do this that is oopsproof is to use a keyed jumper plug (that only fits one way) that connects the batteries in series to the controller for riding. When it is removed, neither battery is connected to anything (including it's counterpart). Then the charger plug uses a connecto...

Prices?

I need help! I have a 36v1000w brushed motor scooter, and I want to upgrade the controller to a Brainpower 38a brushless controller. Can I do that? Since your existing motor is a different kind, the new controller won't run it. You'll need to replace the motor with a new brushless motor with the sa...

There' are posts about them, if it helps:
https://endless-sphere.com/forums/searc ... mit=Search

Not sure I get your point: in "parallel first, than series" config, you still need to connect the bms wires. No more, no less bms wires, than in the "series first, than parallel" config. If a pack is built with a bunch of Xs1p groups, with no built-in parallel interconnects, then you need a complet...

If the controller is the problem (something in it's hall sensor reading ability), and if it is a KT Kunteng Kun Teng controller, you may be able to use the open-source firmware that Casainho / Stancecoke et.al are creating. They also have some for the LCDs for those controller. Just look up Casainho...

It probably will (been done with a number of Stromer rear hubmotors by UUmotor here on ES and elsewhere), but without the Stromer controller you lose the torque sensing PAS, if taht's a feature you like (assuming this model has one like the others I've seen, mounted in a recess at the rear dropout).

I was wondering if anyone has made an e-bike powered with batteries from any of the battery powered tools (e.g. Greenworks, Ego, Ryobi, etc). There's probably dozens of tool pack (toolpack) builds on ES, going back to the old DeWalt A123 packs, to the earliest days of the forum (and probalby before...