Search found 113 matches

by quuxman
Dec 08 2018 6:12pm
Forum: Motor Technology
Topic: controller with PAS input customizable via 3 way switch?
Replies: 2
Views: 77

controller with PAS input customizable via 3 way switch?

I'm looking for a 48V controller for either 20 or 30 amps (depending on which motor it drives) with inputs for PAS (and throttle of course) that can be customized with a 3 way switch. I want the 3 way switch to control overall power (or speed limiter would be OK I guess) and to enable PAS. So switch...
by quuxman
Dec 03 2018 12:06am
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 54784

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

Did a tiny bit more reading, and PETG (with Glycol) is actually softer and stickier than PET, but worksalot better with FDM. This means I indeed want ABS. Also I have a much updated model, now made with parametric modeling so cell configuration can be changed nearly effortlessly: https://gallery.aut...
by quuxman
Nov 30 2018 4:38pm
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 54784

Yet another No Solder/Weld 18650 project

I was very close to ordering a set of N.E.S.E. modules from http://18650.lt/ but they're pretty expensive and I'd still need to make some sort of enclosure for the BMS. So I decided to build something very similar to patrickb (thanks for your post!). Here's the model I have so far: https://i.imgur.c...
by quuxman
Nov 27 2018 4:53pm
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 54784

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

The spring travel is around 2.4mm and here the deformation is max 1mm, also this is with V1 springs with higher force, I reduced the springs force since this calculation. I like this design and would like to do something similar. Could you tell me more about the springs? Where exactly did you sourc...
by quuxman
Nov 26 2018 10:17pm
Forum: Items for Sale - New
Topic: BestTech programmable 6S-20S 80A BMS (HCX-D338) *ALL SOLD*
Replies: 8
Views: 1353

Re: BestTech programmable 6S-20S 80A BMS (HCX-D338) *ALL SOLD*

I would like one of these, assuming the range of the HVC and LVC isn't severely limited like it is on most boards. Do you still have them? What's the range of the HVC, LVC, and balance start voltage?
by quuxman
Nov 26 2018 5:45pm
Forum: E-Bike Technical
Topic: Q100H Performance with Grin/Infineon Controller Issue
Replies: 20
Views: 1118

Re: Q100H Performance with Grin/Infineon Controller Issue

I am running the infenion controller on a Q100 cst 201 at 52v and 15 amps. This is good to hear. I've been running my Q100H at the recommended 36V and ~20A for a few years. I'm seriously considering upgrading the controllers and batteries on both my ebikes to 52 volts with programmable power limits...
by quuxman
Sep 23 2016 9:59am
Forum: E-Bike Technical
Topic: Booster winding for efficient large RPM range
Replies: 3
Views: 512

Booster winding for efficient large RPM range

While riding my local electric train with ebike on board and thinking about tradeoffs with different windings, inspiration struck. I see little reason to stick with one speed of winding. I knew the engineering must be out there, and sure enough, it's called a booster winding, and surprisingly there ...
by quuxman
Sep 20 2016 9:59am
Forum: E-Bike General Discussion
Topic: Cheap USB power adapter for any battery under 60V
Replies: 2
Views: 350

Re: Cheap USB power adapter for almost any battery

MadRhino wrote:This does not work with "almost any battery"
On ES, I guess less than half the members are running within this voltage range.
Good point, I'll edit the OP subject. I don't see the point in going over 60V myself.
by quuxman
Sep 19 2016 10:41pm
Forum: E-Bike General Discussion
Topic: Cheap USB power adapter for any battery under 60V
Replies: 2
Views: 350

Cheap USB power adapter for any battery under 60V

There's this really nifty DC DC converter with 2 USB plugs on Amazon for only 13$! Actually my friend got 3 of them, and I soldered two into Anderson plugs, and the third directly onto a battery. Although rated at 50V, I tested one at 59V and a few watts for a couple hours. It got warm but definitel...
by quuxman
Sep 18 2016 6:23pm
Forum: E-Bike General Discussion
Topic: Super cheap 18 watt headlight
Replies: 0
Views: 338

Super cheap 18 watt headlight

I got this 13$ 18 watt LED motorcycle headlight from Amazon and soldered a 2.1x5mm female power connector (also from Amazon) on it. It took me a while to figure out a reflector bracket worked great for mounting to my mountain size handlebars. The bracket that came with it was useless. I was pretty h...
by quuxman
Sep 16 2016 3:50pm
Forum: E-Bike Technical
Topic: Mac motor making clunking noise and not spinning
Replies: 5
Views: 446

Re: Mac motor making clunking noise and not spinning

I guess it's quite likely the clutch. I can hear the motor spinning, and each time there's a loud clunk, the wheel lurches a bit. Seems like it happens once per clutch revolution.
by quuxman
Sep 16 2016 3:41pm
Forum: E-Bike Technical
Topic: Mac motor making clunking noise and not spinning
Replies: 5
Views: 446

Re: Mac motor making clunking noise and not spinning

Ykick wrote:Sensor or sensorless?
I'm running it sensorless to test it. It was working without Hall sensors before, it would simply cut out at a fairly low RPM. Using 40 amp Grifineon controller.

This really seems like a mechanical problem.
by quuxman
Sep 16 2016 3:36pm
Forum: E-Bike Technical
Topic: Mac motor making clunking noise and not spinning
Replies: 5
Views: 446

Mac motor making clunking noise and not spinning

I'm trying to trouble shoot a mac motor which previously had been working. There are very few miles on this motor. After working on a battery issue and testing the system, the motor started to make a loud clunking sound and not spinning. It jerks a bit and makes maybe an eighth turn each time. It so...
by quuxman
Sep 12 2016 10:58am
Forum: Battery Technology
Topic: yet another solderless DIY battery pack via NIB's
Replies: 225
Views: 55928

Re: yet another solderless DIY battery pack via NIB's

I am still surprised by the level of some amps people try to squeeze out of 4P 18650 setups on soldered/spot welded packs that I think are beyond the rating of 18650s for long-term health of cells.. I think P4 is only good for 250w kits on 18650 cells for getting a lot of cycles in return. Actually...
by quuxman
Sep 10 2016 9:09pm
Forum: Items for Sale - New
Topic: RE-CYCLES EBIKES & EV TECH
Replies: 191
Views: 30108

Re: E-FRAMES $450-$500 w/ FREE SHIPPING + MOTORS/KITS/FERROF

3V-4.1V/cell DOD BMS is badly needed. I like your out of the box approach on the battery. Keep up the good work! YES, so glad to see someone else say this :). Just need to figure out how to create the necessary demand for this in order to get a whole run of them manufactured for 30-50$ per board. I...
by quuxman
Sep 10 2016 11:16am
Forum: Items for Sale - New
Topic: RE-CYCLES EBIKES & EV TECH
Replies: 191
Views: 30108

Re: Weldless Contact SOURCED

Spot on - yes, you lose a little range, but the tradeoff is completely worth it. You had better believe than in my own battery packs, I utilize similar techniques (LV buzzer, not running battery to cutoff, then not 'fully' charging etc)... to achieve the same effect. The only way this could be sort...
by quuxman
Sep 10 2016 5:30am
Forum: Items for Sale - New
Topic: RE-CYCLES EBIKES & EV TECH
Replies: 191
Views: 30108

Re: Weldless Contact SOURCED

Is there literally no interest in this AT ALL? I have not heard a single thing about this so far, but I am not even remotely discouraged. Truth be told, I am more making this for myself. For the actual product which I want dearly, and also for the experience. I'm very interested in a no solder / we...
by quuxman
Sep 10 2016 3:32am
Forum: Items Wanted
Topic: Where oh where can I find a BMS board for 35 A 14s Li ion?
Replies: 14
Views: 1776

Re: Where oh where can I find a BMS board for 35 A 14s Li io

There is a programmable BMS available here: https://endless-sphere.com/forums/viewtopic.php?f=31&t=78552 https://www.energusps.com/shop/product/battery-management-system-bms-s516-30a-16 https://www.energusps.com/shop/product/battery-management-system-bms-s516-150a-750a-36 That is it. After days of ...
by quuxman
Sep 09 2016 3:35pm
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 54784

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

I will use silicon bumps. :D About BMS, I am searching myself for one that stops and balances to ~4.1V/cell, only exotic stuff there ($$$). After days of searching for a simple BMS with adjustable or 3 and 4-4.1 LVC and HVC respectively that did balancing before 4.2V, I concluded there are none. Th...
by quuxman
Sep 05 2016 11:35pm
Forum: Items Wanted
Topic: Where oh where can I find a BMS board for 35 A 14s Li ion?
Replies: 14
Views: 1776

Re: Where oh where can I find a BMS board for 35 A 14s Li io

When talking to a friend who wants to buy one of the packs I build, he gave me a great idea. Instead of worrying about balancing the battery down the road, why not build a balancing charger into the pack? Would that be expensive or take too much space? This would take the place of balancing and over...
by quuxman
Sep 03 2016 1:47pm
Forum: Items Wanted
Topic: Where oh where can I find a BMS board for 35 A 14s Li ion?
Replies: 14
Views: 1776

Re: Where oh where can I find a BMS board for 35 A 14s Li io

Why is it so hard to find a BMS with reasonably adjustable HVC? According to ebikes.ca , the cycle life of Li-ion packs can be tripled by charging cells to 80%. But without a BMS with an appropriate overcharge cut-off and balance voltage set to 4V, this is impossible to do without a perfectly balanc...
by quuxman
Sep 01 2016 9:22am
Forum: Motor Technology
Topic: Maybe 2 megawatt motor? (Motor porn)
Replies: 6
Views: 778

Re: Maybe 2 megawatt motor? (Motor porn)

What are they driving ? ....ot is this the prototype for the Tesla truck ? :lol: Hahaha, that's in the motor room of the Sally Ride research vessel on its maiden voyage. I've got a friend who's a systems engineer who maintains those engines and basically deals with anything that breaks on the boat,...
by quuxman
Sep 01 2016 9:03am
Forum: Motor Technology
Topic: Maybe 2 megawatt motor? (Motor porn)
Replies: 6
Views: 778

Re: Maybe 2 megawatt motor? (Motor porn)

Punx0r wrote:The largest 3 phase induction motor I've stood next to was 15MW ... Interesting stuff to a nerd :)
My my. What was that driving?
by quuxman
Sep 01 2016 1:48am
Forum: Motor Technology
Topic: Maybe 2 megawatt motor? (Motor porn)
Replies: 6
Views: 778

Maybe 2 megawatt motor? (Motor porn)

There's 2 of these guys, one on each side, driven by 4 750 kW generators. Check out the size of those power cables... bigger than my leg. The motor is about 8-10 feet long :).
2016-08-20 23.59.19 small.jpg
by quuxman
Aug 31 2016 8:11pm
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 54784

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

Different sizes available. They are precut, but sticky as hell and you want to have them in right place the first time. Oh I don't like sticky. I'm just going to follow the proven route and get the mcmaster.com poron foam, given the cost is negligible per pack. I'm really excited about this pack bu...