Search found 461 matches

by The Toecutter
Sep 25 2020 7:52am
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1764
Views: 234334

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

My A2B metro has been down for quite some time. Bad battery (built a new one), Bad controller (ordered and waiting for my new nucular controller to come in) and now also Bad hall in the rear hub motor. On sugesstion of another ES member my plan is to update with the new leaf kit listed below. https...
by The Toecutter
Sep 24 2020 6:25pm
Forum: Items for Sale - New
Topic: N.E.S.E. the no solder module
Replies: 415
Views: 64571

Re: N.E.S.E. the no solder module

Its not a set constant of 10 weeks. Post office advertises that shippments MIGHT incure longer delivery times of up to 10 weeks. I get that. It's just that my experience thus far is that everything I ordered from a foreign location(I'm in the U.S.) has taken AT LEAST 10 weeks. I'm still waiting on ...
by The Toecutter
Sep 22 2020 8:27pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1764
Views: 234334

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

A friend of mine ordered the front drive version of the 1500W motor for the 3-wheled car we've been building. At the time, I was not aware that it came with smaller phase wires than the rear drive variant of the motor. What are the largest phase wires that will fit? My guess is 12 awg, but I want to...
by The Toecutter
Sep 21 2020 8:47am
Forum: Items for Sale - New
Topic: N.E.S.E. the no solder module
Replies: 415
Views: 64571

Re: N.E.S.E. the no solder module

There are inheretant issue with welding. Battery packs move ever so slightly even in most rigid packs which introduces high stress point on the welded strip. Also heat damages cell protective surface and it is more susceptible to corrosion. I seen packs damaged this way, segway, makita etc. A frien...
by The Toecutter
Sep 19 2020 9:04pm
Forum: General Discussion
Topic: Jack Rickard Jr. next level
Replies: 5
Views: 360

Re: Jack Rickard Jr. next level

I feel fortunate that I got to meet him. One of the conversations we had in 2013 was about using a 48V system to run a low pole count AC drive in order to keep inverter component costs down, which would still allow peak power at a high enough RPM to reach freeway speeds. Him and I were in agreement ...
by The Toecutter
Sep 17 2020 11:13pm
Forum: E-Vehicles General Discussion
Topic: Delta trikes vs tadpole trikes
Replies: 23
Views: 659

Re: Delta trikes vs tadpole trikes

The differences between the two are much more dependent upon the CoM and frame geometry than the inherent type of layout itself. One will generally have an easier time designing a delta for high-speed straight-line stability and maintaining rear wheel traction than a tadpole, and one will have an ea...
by The Toecutter
Sep 17 2020 7:57pm
Forum: Electric Aircraft
Topic: Exhaust fan on velomobile doubling as propulsion
Replies: 14
Views: 526

Re: Exhaust fan on velomobile doubling as propulsion

If you have a 100w electric exhaust fan at the rear of a velomobile will you get 100w of forward propulsion? The only way that happens is if the blades of the fan are 100% efficient and the motor driving it is 100% efficient. You might get the motor to be around 95% efficient if you are careful in ...
by The Toecutter
Sep 17 2020 11:50am
Forum: E-Bike General Discussion
Topic: Looking for a "get 'er done" no weld no solder battery assembly solution
Replies: 7
Views: 329

Re: Looking for a "get 'er done" no weld no solder battery assembly solution

Grins batteries are currently beyond my budget. I'd be considering them right now if I hadn't already spent $350 on cells, $160 on BMSs, and another $250 for a spot welder that's on the way, but I already have enough LiFePO4 26650s to build a 700 Wh pack or thereabouts and enough LiIon 18650s on the...
by The Toecutter
Sep 17 2020 6:49am
Forum: E-Bike General Discussion
Topic: Looking for a "get 'er done" no weld no solder battery assembly solution
Replies: 7
Views: 329

Re: Looking for a "get 'er done" no weld no solder battery assembly solution

I'm probably going to try my own variant of myzter's method then, as it seems more reliable and less likely to unbalance my cells than a Vruzend kit. I'll wrap it in plastic wrap used for food storage, make a rectangular wooden box of tight fit that can clamp around the batteries at 4 corners using ...
by The Toecutter
Sep 14 2020 11:09pm
Forum: E-Bike General Discussion
Topic: Looking for a "get 'er done" no weld no solder battery assembly solution
Replies: 7
Views: 329

Looking for a "get 'er done" no weld no solder battery assembly solution

I ordered a kweld spot welder with the intent of building a battery pack for my home-built KMX-framed velomobile the right way, but it will take months to arrive due to the disruption in the global shipping of goods. I have everything I need to get my velomobile converted to electric except for a fu...
by The Toecutter
Sep 14 2020 9:54pm
Forum: E-Vehicles General Discussion
Topic: ES member "Farfle", RIP at 27
Replies: 4
Views: 657

Re: ES member "Farfle", RIP at 27

He had a lot to offer the world. It is unfortunate that this happened.
by The Toecutter
Sep 13 2020 10:12pm
Forum: Large EV General Discussion
Topic: Introducing The Minion
Replies: 7
Views: 876

Re: Introducing The Minion

This platform is unoptimized and overweight for what we ultimately have in mind, but is being built as a learning experience. The next one will try to use more off the shelf parts to speed up the build process, but before we get to that point, we are going to get this one running and make a list of ...
by The Toecutter
Sep 13 2020 10:07pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1764
Views: 234334

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

There are a lot of good choices out there. I have a Phaserunner in my possession that can go up to 72V nominal and 96A battery and phase current, but even that won't push this motor to its limits. You could try an ASI BAC8000 and limit the phase current to around 150A. Any more than that and you're ...
by The Toecutter
Sep 12 2020 4:57pm
Forum: Items for Sale - New
Topic: N.E.S.E. the no solder module
Replies: 415
Views: 64571

Re: N.E.S.E. the no solder module

It sucks that if I order these I will have to wait 10 weeks... They would definitely work for my application. I'm currently waiting on a spot welder to arrive, but that will take a similar amount of time. I'm tempted to order a Vruzend kit that I know is likely to cause many problems that these NESE...
by The Toecutter
Sep 12 2020 3:28pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1193
Views: 170186

Re: kWeld - "Next level" DIY battery spot welder

I pre-ordered this(being that they are out of stock at the moment) and whenever they get all the components in stock it will be on the way. I look forward to putting some packs together with it. I have x96 A123 26650s that I want to make a 24S4P LiFePO4 pack with, and another x150 Panasonic NCR18650...
by The Toecutter
Sep 12 2020 8:24am
Forum: Items for Sale - Used
Topic: Lightly used Sanyo/Panasonic NCR18650GA 3500mAh (Red) 10A 3.63V 12.70Wh = $1.5 for one or less. US Seller.
Replies: 14
Views: 1875

Re: Lightly used Sanyo/Panasonic NCR18650GA 3500mAh (Red) 10A 3.63V 12.70Wh = $1.5 for one or less. US Seller.

I look forward to building a 20S6P pack out of these, with some cells left over just in case any are weak or duds.
by The Toecutter
Sep 11 2020 1:57pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1764
Views: 234334

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Trying to dream up a bike that goes miles at a 100 mph that can pedal and weighs less then a hundred pounds is kinda nuts. The laws of physics allow for such a build. The question is whether we will ever have all the components needed to make that build possible. Right now, today, with readily avai...
by The Toecutter
Sep 11 2020 1:34pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1764
Views: 234334

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

I'm 75 miles south of Austin, TX. Figure that my trike is a Class 3. Peddle at 28 mph, 750w, want a sticker that states that. But its a lie, outside of ES members there are few who can tell. Most people don't even know my trike is electric, even with the big leafmotor. Maybe because it's a tadpole ...
by The Toecutter
Sep 11 2020 1:21pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1764
Views: 234334

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

I feel like you're analogous to someone who has a horse, but who instead of riding it, goes to great length to design and build a complex and fragile mechanical capsule around the horse that will allow the horse's natural gallop to carry him at double the horse's natural speed. I don't see how that...
by The Toecutter
Sep 10 2020 10:57pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1764
Views: 234334

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Right, the difference between those is 5%. One part in twenty. Normal users don't have heat rejection as a determining factor in motor efficiency. Lots more folks get by fine with brushed motors that have 60-something percent efficiency, than those who abuse their equipment so grossly as to choose ...
by The Toecutter
Sep 10 2020 10:30pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1764
Views: 234334

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

How much do you think motor efficiency can possibly be improved from 90%? Hint: not "much more". Your hint is incorrect. There have been off the shelf motors that used to be produced and sold that could do 95% peak and a broad operating range greater than 90%, such as the Hubmonster John in CR ment...
by The Toecutter
Sep 10 2020 11:50am
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1764
Views: 234334

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

That thing would be a complete and total nightmare to pedal regardless of how thick your motor lamination are. You'd be better off just walking. Perhaps. Such a vehicle would have to be designed to remain under 100 lbs when the rider is not in it. Even that may not be enough. It's also going to nee...
by The Toecutter
Sep 10 2020 11:21am
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1764
Views: 234334

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Currently run 20S 7P 36A continuous 60A BMS, mated with a Grinfineon 40A for my 7T leafmotor max speed about 33 mph/ 53 kph on flats but 7T drops speed to build power and torque for hills. Only time I drive that fast is out on the hwy's between towns but the speed limit for cars is 45-80 mph so not...