Search found 10138 matches

by spinningmagnets
Jan 23 2019 7:31pm
Forum: E-vents
Topic: Sea Otter Classic 2019, April 11-14, Monterey California
Replies: 4
Views: 70

Re: Sea Otter Classic 2019, April 11-14, Monterrey California

I notice the 160-Nm Bafang Ultra Max is not on the "allowed" list...also the 120-Nm TQ drive...
by spinningmagnets
Jan 23 2019 7:23pm
Forum: General Discussion
Topic: Anyone into air guns/ air rifles ?
Replies: 4
Views: 73

Re: Anyone into air guns/ air rifles ?

I get raccoons and possums in my back yard. I am a live-and-let-live guy, but I do know that sometimes they carry serious diseases, and I may sometimes need to dispose of a violent visitor. I live just close enough to a town that it would cause me serious issues with the police if I used a gun, and ...
by spinningmagnets
Jan 22 2019 11:28pm
Forum: E-Bike General Discussion
Topic: Scratched the side of the windings, will it be OK?
Replies: 1
Views: 65

Re: Scratched the side of the windings, will it be OK?

They will be fine, you just don't want the bare parts from one scratched wire to short the current to the other wire (or the case). Brush on some high-temp motor sealant, maybe check doctor bass posts about ventilating hubmotors, they sprayed sealing over the entire insides to prevent rust, and he r...
by spinningmagnets
Jan 22 2019 11:19pm
Forum: E-vents
Topic: Sea Otter Classic 2019, April 11-14, Monterey California
Replies: 4
Views: 70

Sea Otter Classic 2019, April 11-14, Monterey California

This is a mountain bike festival, just an hours drive south of San Francisco, and near the ocean. Previously, I had not been too interested, but last year turned out to be surprisingly "ebike friendly", due to the major bike brands finally jumping on-board the electric bandwagon. The Reno Interbike ...
by spinningmagnets
Jan 20 2019 10:03am
Forum: Battery Technology
Topic: I designed a simple 3D-printed solderless battery pack.
Replies: 5
Views: 254

Re: I designed a simple 3D-printed solderless battery pack.

You're welcome. You are on the right track. There are similar designs floating around or already in production. Having several types to compare each aspect of their design is a good thing for all of us.
by spinningmagnets
Jan 20 2019 3:58am
Forum: Battery Technology
Topic: I designed a simple 3D-printed solderless battery pack.
Replies: 5
Views: 254

Re: I designed a simple 3D-printed solderless battery pack.

That might work fine at the negative end, but the entire bottom and sides are charged with the Negative. This means vibration can cause anything that is rubbing against the shoulder on the positive end can wear through and cause a short. You might add some additional protection to just barely cover ...
by spinningmagnets
Jan 20 2019 1:13am
Forum: Motor Technology
Topic: Ferrite as a stator material?
Replies: 17
Views: 1291

Re: Ferrite as a stator material?

Cedric Lynch could have used a motor style with very thin laminations, but I was under the impression that he was seeking very high efficiency in a specific size of motor package. His aero semi-recumbent E-motorcycle was his vision of a light and cheap single-rider vehicle to reduce the use of 4,000...
by spinningmagnets
Jan 19 2019 11:03pm
Forum: Motor Technology
Topic: All-In-One Motor
Replies: 10
Views: 256

Re: All-In-One Motor

There are plenty of motors that use a solid axle with the wires coming out the side of the motor. I can see where that would make modifying the insides of the motor space easier. I think what you described at one point was an outrunner. An inrunner and outrunner both have a rotor and [stationary] st...
by spinningmagnets
Jan 19 2019 10:38am
Forum: E-Bike Non-hub Motor Drives
Topic: Left side freewheel sprocket adaptor
Replies: 50
Views: 4145

Re: Left side freewheel sprocket adaptor

"...or 1 time 8074..." So far, I haven't built a better motor & controller set up than the 6-turn, 2-in hand, 14G, dlrk/wye terminated motor...run the thing with a 12 or 18-FET xie-chang with a 6-Kw limit on 20 LiPo cells & you will not find a better RC power combination [with external hall sensors]...
by spinningmagnets
Jan 18 2019 9:12pm
Forum: E-Bike General Discussion
Topic: My first massive controller with these connectors
Replies: 6
Views: 201

Re: My first massive controller with these connectors

Copper oxidizes easily (turns from bright red to dull brown) and that thin oxide film is less conductive. It's not a huge problem at higher voltages (indoor 120V AC), but on an outdoor 12V system like cars, corrosion is a constant struggle. The coating is likely to be tin or possibly zinc. If it was...
by spinningmagnets
Jan 17 2019 9:27pm
Forum: E-Bike Technical
Topic: Advice? ebike battery to variable DC/DC step-down converter
Replies: 3
Views: 97

Re: Advice? ebike battery to variable DC/DC step-down converter

Thanks for taking the time to find those, I appreciate your effort.

Unless somebody stops me, that Yeeco 5-Amp for $40 is looking pretty sweet.
by spinningmagnets
Jan 17 2019 9:20pm
Forum: Items for Sale - New
Topic: I did it - I launched my Bafang Ultra based ebike! Also selling Bafang Ultra spares !
Replies: 24
Views: 660

Re: I did it - I launched my Bafang Ultra based ebike! Also selling Bafang Ultra spares !

Hey, the shell that the ultra bolts up to, is it aluminum or steel? Does Bafang have both, or only one?

Image
by spinningmagnets
Jan 17 2019 2:59pm
Forum: E-Bike Technical
Topic: Advice? ebike battery to variable DC/DC step-down converter
Replies: 3
Views: 97

Advice? ebike battery to variable DC/DC step-down converter

I already have a robust potted DC/DC that takes 36V-60V and converts that to 12V for ebike lights, radio, etc...(search ebay for "golf cart DC/DC"). I have wanted a variable input/output DC/DC converter for a while (for a variety of projects). The push right now for me is that the kCap uses 6V-8V DC...
by spinningmagnets
Jan 16 2019 12:03pm
Forum: E-Bike General Discussion
Topic: I bought an E Bike for my wife but she says its to slow
Replies: 16
Views: 599

Re: I bought an E Bike for my wife but she says its to slow

Plenty of ebikers are happy with 250W. But...if she wants more power, I say why not? Hard to say how much power she would be happy with until she takes a test ride. My "go to" answer is a 52V BBSHD with three gears on the rear wheel IGH, or 6-speed mega-range freewheel and derailleur. That's my favo...
by spinningmagnets
Jan 15 2019 12:20pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Knight Electric Motorcycle 5000w
Replies: 32
Views: 735

Re: Knight Electric Motorcycle 5000w

At 72V, 5000W / 8000W is 70A and 110A.

As much as $1000 is worth saving, buying the lead acid and making my own lithium battery is not the only consideration. The 8000W is certain to have a much larger controller to handle the extra 40A
by spinningmagnets
Jan 15 2019 9:08am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Knight Electric Motorcycle 5000w
Replies: 32
Views: 735

Re: Knight Electric Motorcycle 5000w

I'm certain they have threaded mounts to screw-in mirrors. All three pics look like they were taken at the same shipping facility. It's a safe assumption that the vendor got a shipment from the wholesaler and simply needed to rapidly unbox the three colors he had in order to take pics for the sales ...
by spinningmagnets
Jan 15 2019 8:31am
Forum: General Discussion
Topic: Fiat Chrysler pays millions...
Replies: 17
Views: 270

Re: Fiat Chrysler pays millions...

People who pay extra to get the diesel engine as an option have been polled to see why. The majority liked the high torque and good fuel mileage. The mileage is improved by running lean, but doing that results in higher nitrides of oxygen / NOx. The software was written to sense when the emissions a...
by spinningmagnets
Jan 14 2019 7:39pm
Forum: General Discussion
Topic: Fewer Americans bike to work despite new trails, lanes and bicycle share programs
Replies: 14
Views: 359

Re: Fewer Americans bike to work despite new trails, lanes and bicycle share programs

Cheap gas...
I've seen several cycles before in the economy and ebike sales. Cheap gas is a major factor in US customer purchases. It's $1.85/gal right now near me in N.E. Kansas.
by spinningmagnets
Jan 13 2019 11:22am
Forum: Battery Technology
Topic: Zero 2012 XU
Replies: 3
Views: 85

Re: Zero 2012 XU

I think your best bet is to look for Chevy Volt cells. Their side dimension is 177mm X 127mm.

The capacity of each cell is 15-Ah. There may be a better option, but these are reasonably affordable, available, and they will fit.

https://endless-sphere.com/forums/viewt ... 0#p1307267
by spinningmagnets
Jan 12 2019 6:02pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 530
Views: 63357

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

Does that shipping cost have a break-down you could post? Some places have a Value Added Tax / VAT, and many countries have a customs fee. There might even be other charges that a dealer shipping from one US state to another US state would not be affected by...
by spinningmagnets
Jan 12 2019 11:39am
Forum: Motor Technology
Topic: Waterproof your controller connectors on the cheap
Replies: 4
Views: 174

Re: Waterproof your controller connectors on the cheap

Good job, it is obvious that this is much better than the stock connectors flapping in the breeze. I'd like to suggest something that I believe will be a small improvement. Have all the wires enter the plastic junction box from one opening, and locate that opening facing downwards. A sort of "drip l...
by spinningmagnets
Jan 11 2019 4:33pm
Forum: E-Bike Technical
Topic: Waterproof wire nuts vs soldering connections
Replies: 10
Views: 261

Re: Waterproof wire nuts vs soldering connections

Wire nuts work fine on 120V house connections. The higher volts can easily penetrate mild oxidation (copper is brown instead of bright reddish). Plus...houses don't experience the same moisture, vibration, and jolts that an ebike experiences... Even if a wire nut holds the connection for a year, it ...
by spinningmagnets
Jan 11 2019 10:24am
Forum: Motor Technology
Topic: Infinitum PCB stator AC motor
Replies: 2
Views: 113

Re: Infinitum PCB stator AC motor

There is a kick-scooter that has this type of stator, I can't remember the name.

This style of stator is good for high volts, low amps...