Search found 965 matches

by Wheazel
Jun 12 2017 7:30am
Forum: Motor Technology
Topic: Idiots guide to rewinding Revolt 120 pro
Replies: 295
Views: 33836

Re: Idiots guide to rewinding Revolt 120 pro

Fantastic, can't wait for running reports.
It is perfect that you have an unmodded motor alongside the rewound motor.
Should give a good basis for accurate evaluation.

Planning to replace the motor on your bike or other uses?
by Wheazel
Jun 08 2017 1:25am
Forum: Motor Technology
Topic: Idiots guide to rewinding Revolt 120 pro
Replies: 295
Views: 33836

Re: Idiots guide to rewinding Revolt 120 pro

I don't know about the insulation on that particular copper wire, but my general experience with coated wire for electric motors is that the coating is very tough. It is close to impossible to melt the coating with solder and some grinding with a sandpaper is needed to clear the coat. is it visible ...
by Wheazel
Jun 07 2017 1:44am
Forum: Motor Technology
Topic: Idiots guide to rewinding Revolt 120 pro
Replies: 295
Views: 33836

Re: Idiots guide to rewinding Revolt 120 pro

Well done! Lets hope the correction goes smooth. It is so easy to lose track of turns when winding. It is monotonous work and the mind flies away to another place and suddenly you sit there and wonder if it was 14 or 15 :) Good thing you cut the wires to the same length, otherwise that might have fl...
by Wheazel
Jun 01 2017 12:02pm
Forum: Motor Technology
Topic: Idiots guide to rewinding Revolt 120 pro
Replies: 295
Views: 33836

Re: Idiots guide to rewinding Revolt 120 pro

Very nice, I have the same experience from the little cnc machining I have done. Easy for small errors to sneak in if you do a lot of different operations.
How did you do the centering of the part?
by Wheazel
May 26 2017 1:22pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1508
Views: 198016

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

Changing to thicker wires will always make a difference, but might be a useless difference if they aren't the bottleneck.
Are your outside wires getting warm?
by Wheazel
May 24 2017 6:46am
Forum: Motor Technology
Topic: Idiots guide to rewinding Revolt 120 pro
Replies: 295
Views: 33836

Re: Idiots guide to rewinding Revolt 120 pro

@wheazel: It's certainly worthwile to start, stator prep and stripping takes some time. For wire choice and turn count it might be good to see how it goes for me.. I think the motor might be OK after only a little love and new halls though. Crazy thing is that for flattish road driving i don't need...
by Wheazel
May 23 2017 8:52am
Forum: E-Bike Build Threads / Photos & Video
Topic: Cowardlyducks Commuter Build - E-bikeE
Replies: 299
Views: 50584

Re: Cowardlyducks Commuter Build - E-bikeE

Looks like a very comfy ride! I can see the appeal with this kind of bike.
Especially for commuting and pleasure riding.
by Wheazel
May 23 2017 6:43am
Forum: Motor Technology
Topic: Idiots guide to rewinding Revolt 120 pro
Replies: 295
Views: 33836

Re: Idiots guide to rewinding Revolt 120 pro

I am getting tempted to pull the windings off my revolt, but I keep telling myself to wait for Larsb's results :)
by Wheazel
May 20 2017 4:40pm
Forum: E-Bike Non-hub Motor Drives
Topic: HPC Revolution XXX
Replies: 348
Views: 52512

Re: HPC Revolution XXX

Again very nice work, how is the revolt doing? Have you seen Larsb's revolt rewinding thread in the motor tech section?
by Wheazel
May 20 2017 4:31pm
Forum: E-Bike Technical
Topic: Why is my new hub motor making my controller super hot?
Replies: 102
Views: 6093

Re: Why is my new hub motor making my controller super hot?

It sounds like the new motor is a lower voltage motor, so it will spin faster and draw more current. This may make the controller slightly hotter. Much hotter indicates a phasing problem. Lower voltage? The only specs I see for both controllers and motors are their watts and the amp discharge. And ...
by Wheazel
May 20 2017 4:17pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1508
Views: 198016

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

Without seeing the items you are talking about I would guess that you are correct.
What about a 1mm sleeve on the 12mm axle to guide it?

You can also calculate how much of a diff that 1mm will make.
I guess not noticeable and probably in range of what a discbrake caliper can adapt to.
by Wheazel
May 16 2017 5:20am
Forum: Battery Technology
Topic: If you are building packs today, which cells to choose?
Replies: 82
Views: 12778

Re: If you are building packs today, which cells to choose?

I think I would also include NCR18650b. Properly sized into 6P+ groupings, they will easily provide 40A continuous at 2C and be happy about it. If you keep these cells with 20% to 80% SOC, you can exceed 28,000 cycles. There's many a good reason that Tesla uses them in the Model S. You just have to...
by Wheazel
May 16 2017 2:27am
Forum: Motor Technology
Topic: 3D printed outrunner brushless
Replies: 10
Views: 1495

Re: 3D printed outrunner brushless

Fun example of fiber reinforced fdm. https://markforged.com/3d-printing-the-strongest-link/ to me, that is another good example of how not to use 3Dp ! Im sure you know that they could have produced a 3Dp "link" that would have been much stronger, but they chose to mimic a design optimized for stee...
by Wheazel
May 16 2017 1:54am
Forum: Motor Technology
Topic: Idiots guide to rewinding Revolt 120 pro
Replies: 295
Views: 33836

Re: Idiots guide to rewinding Revolt 120 pro

Cool :) How is the punch right from 0?
by Wheazel
May 14 2017 9:09am
Forum: Motor Technology
Topic: 3D printed outrunner brushless
Replies: 10
Views: 1495

Re: 3D printed outrunner brushless

Its very likely there may be materials that could be used to 3dp a motor can, but at what diameter and what rpm would you be confident of.? Further, i would suspect the cost of a motor bell produced in that manner would far exceed varous other established methods with conventional materials.....eve...
by Wheazel
May 14 2017 7:52am
Forum: Motor Technology
Topic: 3D printed outrunner brushless
Replies: 10
Views: 1495

Re: 3D printed outrunner brushless

I think this just demonstrates that there are far better materials to make motor rotors from. ....And the limitations of 3d printing materials . What is a 3dprinting material? I would consider myself pretty well oriented in the 3dprinting / addivitve manufacturing area. I do have 5different printer...
by Wheazel
May 13 2017 2:58pm
Forum: Motor Technology
Topic: Idiots guide to rewinding Revolt 120 pro
Replies: 295
Views: 33836

Re: Idiots guide to rewinding Revolt 120 pro

I think you are taking an unecessary risk by not measuring the coils until the end.
Maybe you would need to adjust the winding method/preps slightly to avoid shorts (if there happen to be any)
Why wait?
by Wheazel
May 09 2017 9:39am
Forum: Motor Technology
Topic: Idiots guide to rewinding Revolt 120 pro
Replies: 295
Views: 33836

Re: Idiots guide to rewinding Revolt 120 pro

Any more words on how the stock motor is performing after the problem with bad hall signals was solved?
Maybe you discovered something more? Changes in efficiency? Motor heat?
by Wheazel
May 08 2017 1:00pm
Forum: E-Bike General Discussion
Topic: Short telescoping handle behind bike seat?
Replies: 26
Views: 2403

Re: Short telescoping handle behind bike seat?

Its borderline impossible to discuss design with this one, any input that doesn't align with some initial idea will be disregarded and names will be called. Just reminds me of the puffy-bag-trike-thread. Hey Mr "puffy bag" calling person. Please, won't you gfy. Thanks. I've looked at all you've des...
by Wheazel
May 08 2017 2:57am
Forum: E-Bike General Discussion
Topic: Short telescoping handle behind bike seat?
Replies: 26
Views: 2403

Re: Short telescoping handle behind bike seat?

Its borderline impossible to discuss design with this one, any input that doesn't align with some initial idea will be disregarded and names will be called.
Just reminds me of the puffy-bag-trike-thread.
by Wheazel
May 05 2017 1:49am
Forum: Motor Technology
Topic: Idiots guide to rewinding Revolt 120 pro
Replies: 295
Views: 33836

Re: Idiots guide to rewinding Revolt 120 pro

I vote for getting your priorities straight!
The motor is waiting! :) Maybe your mother in law can sleep on the kitchen floor with a chunk of wood as pillow?
(and also my finger is getting tired from pressing f5)
by Wheazel
Apr 20 2017 5:13am
Forum: Motor Technology
Topic: Idiots guide to rewinding Revolt 120 pro
Replies: 295
Views: 33836

Re: Idiots guide to rewinding Revolt 120 pro

So nice, starting to have great hopes my revolt can go on some offroad fun bike with sufficient power.

I assume it pulls strong with a 200A+ 72V system geared for 50km/h. Sounds like a rocket if the motor is efficient under heavy load.
by Wheazel
Apr 20 2017 5:04am
Forum: E-Bike Non-hub Motor Drives
Topic: BBSHD: I'm skeptical
Replies: 22
Views: 2861

Re: BBSHD: I'm skeptical

Should you ditch the bbshd idea?
Probably

Also what Chalo said.
by Wheazel
Apr 20 2017 2:47am
Forum: E-Bike General Discussion
Topic: electric/solar bicycle
Replies: 23
Views: 3233

Re: electric/solar bicycle

If I were to pursue a solar build, that would be due to factors like: - Want to experiment and learn - I will be going places where charging a battery won't happen Furthermore the build would be strict in terms of weight, as you can not expect to have meaningful solar help at all times. That is why ...