Search found 53 matches

by Dougt
Jan 29, 2015 10:14 am
Forum: E-Bike Technical
Topic: Rheostat and adding another battery to ebike for more volts
Replies: 27
Views: 1359

Re: Rheostat and adding another battery to ebike for more vo

YOu won't get anything at all out of adding a single extra battery in parallel with one of your existing batteries, other than a heavier bike and a lighter wallet. I don't think that is right. Adding another battery of equal capacity and voltage (in this case 48V 10ah SLA) in parallel doubles the A...
by Dougt
Jan 27, 2015 10:30 am
Forum: Items for Sale - New
Topic: Advanced ADAPTTO controllers and compatible products
Replies: 1533
Views: 165729

Re: The most advanced Adaptto Mini-E Controller + BMS

Dear Dougt, as I already answered you via e-mail, please accept the apologies from Adaptto team for the inconvenience. This is the first case in our practice and it is just a human factor - happens to everyone. We are now designing the new package and will undoubtedly include additional protection ...
by Dougt
Jan 27, 2015 10:24 am
Forum: Items for Sale - New
Topic: Advanced ADAPTTO controllers and compatible products
Replies: 1533
Views: 165729

Re: The most advanced Adaptto Mini-E and Max-E Controllers +

To be fair, think of it like this......if the controller cant stand being put in a box and sent across the world, there isnt a hope in hells chance of it standing up to the vibrations on a bike, so it has to be tough, that would explain why there is no packing, as its built to take vibrations etc. ...
by Dougt
Jan 27, 2015 10:11 am
Forum: E-Bike Technical
Topic: Rheostat and adding another battery to ebike for more volts
Replies: 27
Views: 1359

Re: Rheostat and adding another battery to ebike for more vo

by putting 48 more volts in parallel that would make a total of 96volts, controller can't handle that, the rheostat is so that i can plug in another battery but keep it lower than 60 volts at first, but as the existing batteries lose juice i want to dialup more from the backup to keep up the speed ...
by Dougt
Jan 26, 2015 10:18 pm
Forum: E-Bike Technical
Topic: Rheostat and adding another battery to ebike for more volts
Replies: 27
Views: 1359

Re: Rheostat and adding another battery to ebike for more vo

From your original post I gather your goals are primarily increased range, and secondly increased speed. Your idea of using a rheostat doesn't sound appropriate at all, even if you knew your controller could handle more volts. Also know that other systems on your moped are likely made for the 48v sy...
by Dougt
Jan 26, 2015 10:04 am
Forum: Items for Sale - New
Topic: Advanced ADAPTTO controllers and compatible products
Replies: 1533
Views: 165729

Re: The most advanced Adaptto Mini-E and Max-E Controllers +

Hey folks, received my Adaptto Max-E + BMS + charger today...barely. They only put half my address on the package. No street address, so looking at tracking on saturday, the post office said it was " Your item was undeliverable as addressed.. It is being returned if appropriate information is availa...
by Dougt
Jan 16, 2015 10:37 am
Forum: E-Bike Technical
Topic: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tires)
Replies: 2003
Views: 196097

Re: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tir

anybody know the effective spoke diameter for a pro-wheel 19x1.85 rim? Should be around 470 mm with 18x6.4mm spoke nipples. You may have to grind a couple spokes after truing. My 19x1.85 Tegasko was 470mm which is what I base the data on. You really should consider a 19x1.4 rim, it will be up to tw...
by Dougt
Jan 15, 2015 12:42 pm
Forum: E-Bike Technical
Topic: The Unofficial 'CroMotor' Owners Tech-Tips Thread
Replies: 487
Views: 70883

Re: The Unofficial 'CroMotor' Owners Tech-Tips Thread

hi Doug I have been running a cromotor at 100v for the last 2 years I'm 215 pounds. in the summer it has been nothing but great it's been ran in the extreme heat in the rain in the mud I do not have any test results as far as numbers but it's still going strong nothing's burned out knock on wood so...
by Dougt
Jan 15, 2015 11:35 am
Forum: E-Bike Technical
Topic: The Unofficial 'CroMotor' Owners Tech-Tips Thread
Replies: 487
Views: 70883

Re: The Unofficial 'CroMotor' Owners Tech-Tips Thread

Does anybody have a performance test report for the cromotor at 72V (or so) they could post here? I see there is one for 48V posted early in this thread, but not sure how well that scales...current should scale linearly, and input power as V^2, but that isn't exactly true, since the magnetic steel d...
by Dougt
Jan 13, 2015 6:45 pm
Forum: Motor Technology
Topic: Motor lifetime
Replies: 26
Views: 2424

Re: Motor lifetime

Regarding magnetic aging, since none of the steel in there should be magnetized in the first place, there's no reason to worry about it losing any of that magnetism. ;) So, it doesn't apply. I disagree - I think it could possibly lead to problems. Not saying this is happening, but the shape of the ...
by Dougt
Jan 13, 2015 6:27 pm
Forum: Motor Technology
Topic: Motor lifetime
Replies: 26
Views: 2424

Re: Motor lifetime

Folks, after doing some reading, I think I have found the answer. The phenomena is called "magnetic aging". from wikipedia article on electrical steels: "...The presence of carbon has a more detrimental effect than sulfur or oxygen. Carbon also causes magnetic aging when it slowly leaves the solid s...
by Dougt
Jan 13, 2015 6:02 pm
Forum: Motor Technology
Topic: Motor lifetime
Replies: 26
Views: 2424

Re: Motor lifetime

They make cromotor so :lol: But I highly doubt that magnet will demagnetize so fast, and nobody should be concerned about that for a very long time. I agree, so why would a vendor even bring it up? Usually people don't want to say their products will wear out in 3 years, especially if that isn't tr...
by Dougt
Jan 13, 2015 5:57 pm
Forum: Motor Technology
Topic: Motor lifetime
Replies: 26
Views: 2424

Re: Motor lifetime

Have you tried drilling holes in a crystalyte hub then you know what hard steel they use... I agree with most of what you posted. As for hard/soft, sorry I should have made it clear that by "soft" steel, I mean't magnetically soft - which means it doesn't retain much magnetization (low remanence) a...
by Dougt
Jan 13, 2015 5:53 pm
Forum: Motor Technology
Topic: Motor lifetime
Replies: 26
Views: 2424

Re: Motor lifetime

If the* magnets* get hot enough (past the Curie point) long enough, they can demagnetize partially or completely, but A) they're not steel B) you're abusing the motor seriously to get it to that point C) if you're using the motor within their specs and it gets that hot, their specs are lies I didn'...
by Dougt
Jan 13, 2015 1:19 pm
Forum: Items for Sale - New
Topic: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China
Replies: 1091
Views: 139682

Re: QS 500W-10kW BLDC In-Wheel Hub Motor Catalog (Manufactur

Vito, I have questions about the 3-5 year lifetime. What steel are you talking about? Do you mean the permanent magnets? I don't want to hijack your for-sale posting with technical questions, so could you go to this thread and answer them? http://endless-sphere.com/forums/viewtopic.php?f=30&t=66060 ...
by Dougt
Jan 13, 2015 1:02 pm
Forum: Motor Technology
Topic: Motor lifetime
Replies: 26
Views: 2424

Motor lifetime

In the for sale new section, a guy that is selling QS motors is claiming that they only last 3-5 years before the "steel" "loses its magnetization" and the steel needs to be replaced to bring back efficiency. Since QS builds a large percent of the motors that are re-branded and sold for e-bikes, sco...
by Dougt
Jan 12, 2015 7:48 pm
Forum: E-Bike Technical
Topic: The Unofficial 'CroMotor' Owners Tech-Tips Thread
Replies: 487
Views: 70883

Re: The Unofficial 'CroMotor' Owners Tech-Tips Thread

For what I know, Many people uses this Quanshun motor. What Cromotor team did is take quanshun motor and modify it for ebike. Also maked sure that the factory uses good quality parts. You can actually buy a quanshun that is better than Cro. Factory do mods like better copper fill on stator and bett...
by Dougt
Jan 12, 2015 12:32 pm
Forum: E-Bike Technical
Topic: The Unofficial 'CroMotor' Owners Tech-Tips Thread
Replies: 487
Views: 70883

Re: The Unofficial 'CroMotor' Owners Tech-Tips Thread

Hi Cromotor guys, In the "for sale section" there is a guy selling QS motors that he says are identical to the cromotor, in both form and performance. http://endless-sphere.com/forums/viewtopic.php?f=31&t=65929 Is this true? He posts two performance curves, on for V2 and one for V3. http://endless-s...
by Dougt
Jan 11, 2015 3:09 pm
Forum: E-Bike Technical
Topic: Tilt switch for master battery disconnect relay (contactor)
Replies: 4
Views: 393

Tilt switch for master battery disconnect relay (contactor)

Hi, I was wondering if anyone has played with putting a tilt sensor (few dollars from digikey) circuit in series with the master battery switch. The motive is to disconnect the battery in case of a crash. Two fears, the throttle gets stuck on, either mechanically our through a short and the bike tir...
by Dougt
Jan 11, 2015 2:58 pm
Forum: Items for Sale - New
Topic: Advanced ADAPTTO controllers and compatible products
Replies: 1533
Views: 165729

Re: The most advanced Adaptto Mini-E Controller + BMS

You can have both types of regen set up at the same time. I have both brake levers and a push button connected to on/off regen and I have a left handed throttle connected to variable regen. Is there anyway you could post a schematic or describe the connections to the controller. I'm looking at the ...
by Dougt
Jan 11, 2015 12:57 pm
Forum: Items for Sale - New
Topic: Advanced ADAPTTO controllers and compatible products
Replies: 1533
Views: 165729

Re: The most advanced Adaptto Mini-E Controller + BMS

Thanks Striker and Crea2k.
by Dougt
Jan 10, 2015 12:16 pm
Forum: Items for Sale - New
Topic: Advanced ADAPTTO controllers and compatible products
Replies: 1533
Views: 165729

Re: The most advanced Adaptto Mini-E Controller + BMS

Some Adaptto questions (I apologize if the answers are already on ES...the hazard of long threads) 1) BMS a)I see the Adaptto BMS's come with modules that add 4s. Do all the BMS module positions have to be populated? In other words, does the battery pack have to have 16s, 20s, 24s etc or can it be s...
by Dougt
Jan 05, 2015 12:54 pm
Forum: General Discussion
Topic: DIY graphene high capacity supercapacitors -use a DVD writer
Replies: 64
Views: 11762

Re: Graphene capacitors

capacitors now are makeable with an energy density equivalent to lead acid batteries at 30 watt hours per kilo (depending where you read). Lipo are 200 watt hour to kilo. Theyre all over YouTube and look super easy to make, although maybe not quite up to the 30watt hour to kilo ability though. Peop...
by Dougt
Jan 03, 2015 5:08 pm
Forum: Battery Technology
Topic: Creating my own battery pack
Replies: 38
Views: 2081

Re: Creating my own battery pack

I agree, bolting prismatics is way easier, but you have less options and usually a higher price for the same performance as cylindricals. And prismatics have less flexibility in form fitting your battery space. I am still looking at that option As for cylindricals, specifically 18650 size, I've give...
by Dougt
Jan 03, 2015 4:20 pm
Forum: Battery Technology
Topic: Creating my own battery pack
Replies: 38
Views: 2081

Re: Creating my own battery pack

I believe you're taking the better course and have a spot-welder of my own also in my wish-list of things. FYI, my AMP20 cells and maker-kit came from OSNPower. They offer a spot welding service. Possible to have a tab spot welded to every cell. Then its a matter of soldering or bolting the tabs to...