Search found 44 matches

by ebike4healthandfitness
Jan 01 2021 11:59pm
Forum: EBike General Discussion
Topic: Very Impressed by fast motor winding with gear reduction vs. Slow motor Winding without gear reduction
Replies: 8
Views: 458

Re: Very Impressed by fast motor winding with gear reduction vs. Slow motor Winding without gear reduction

Sure, but the benefits trade off against additional cost, weight, wear, maintenance, space onboard, noise, filth, pinch hazard, and points of failure when you add an extra reduction stage. Whether it's worth it depends on application. Perhaps now with fat bikes......which have a greater O.L.D. (e.g...
by ebike4healthandfitness
Jan 01 2021 7:17pm
Forum: Forum Rules and Features
Topic: If you had the chance to start endless sphere all over again, what would you change?
Replies: 54
Views: 1941

Re: If you had the chance to start endless sphere all over again, what would you change?

LeftieBiker wrote:
Nov 25 2020 12:45am
Enforce a rule limiting flame wars to certain OT topics. Encourage posters to proofread their work before pressing "submit." Add a dedicated forum (assuming there isn't one) for pre-built bikes like mine.
I agree.

This forum definitely needs a dedicated forum for pre-built bikes.
by ebike4healthandfitness
Dec 29 2020 3:08pm
Forum: EBike General Discussion
Topic: Very Impressed by fast motor winding with gear reduction vs. Slow motor Winding without gear reduction
Replies: 8
Views: 458

Very Impressed by fast motor winding with gear reduction vs. Slow motor Winding without gear reduction

H3525 vs. H3548 with 2:1 reduction: https://i.ibb.co/VHfsdJF/Screenshot-27.png MAC 12T vs. MAC 6T with 2:1 reduction: https://i.ibb.co/q1mWr3M/Screenshot-26.png Notice how the very impressive gain in efficiency at the lower and midrange speeds in both the Crystalyte direct drive motor and MAC geared...
by ebike4healthandfitness
Oct 29 2020 3:34pm
Forum: EBike General Discussion
Topic: Slowest wind direct drive hub motor(s) available?
Replies: 63
Views: 1693

Re: Slowest wind direct drive hub motor(s) available?

What about the gap between the magnets? You could analyze it forever and get a percentage point here or there. The bottom line, it doesnt matter! Just get out there and ride. Stop analyzing and make the purchases now. You may need to lower your expectations. Nothing I see in this thread indicates t...
by ebike4healthandfitness
Oct 29 2020 2:10pm
Forum: EBike General Discussion
Topic: Slowest wind direct drive hub motor(s) available?
Replies: 63
Views: 1693

Re: Slowest wind direct drive hub motor(s) available?

What about the gap between the magnets? You could analyze it forever and get a percentage point here or there. The bottom line, it doesnt matter! Just get out there and ride. Stop analyzing and make the purchases now. You may need to lower your expectations. Nothing I see in this thread indicates t...
by ebike4healthandfitness
Oct 29 2020 2:49am
Forum: EBike General Discussion
Topic: Slowest wind direct drive hub motor(s) available?
Replies: 63
Views: 1693

Re: Slowest wind direct drive hub motor(s) available?

I did plug in some comparisons (using the ebikes.ca simulator) using Grin V1 vs. Grin V2.....both fast and slow winds.....and I also used 26" wheels and 20" wheels. Keeping the wheel size and controller (either Phaserunner or Baserunner) constant the V2 does indeed have a little bit slower...
by ebike4healthandfitness
Oct 28 2020 2:37pm
Forum: EBike General Discussion
Topic: Slowest wind direct drive hub motor(s) available?
Replies: 63
Views: 1693

Re: Slowest wind direct drive hub motor(s) available?

Some more info on that Grin All axle motor: https://ebikes.ca/product-info/grin-products/all-axle-hub-motor.html n addition to the mechanical changes we also updated from N35 to N40 grade magnets. Stronger magnets allow the motor to produce more torque for hill climbing with less heat loss, but they...
by ebike4healthandfitness
Oct 28 2020 4:23am
Forum: EBike General Discussion
Topic: Slowest wind direct drive hub motor(s) available?
Replies: 63
Views: 1693

Re: Slowest wind direct drive hub motor(s) available?

Ok, so according to Leaf: https://www.leafbike.com/u_file/images/19_07_26/125519b508.jpg And eikes.ca spoke calculator: https://ebikes.ca/tools/spoke-calc.html?hub=5300&pair=false&rim=20DM Both the leaf 1500W and Clyte 5305 make a dishless front wheel. Both motors also have the ~same flange ...
by ebike4healthandfitness
Oct 28 2020 3:11am
Forum: EBike General Discussion
Topic: Slowest wind direct drive hub motor(s) available?
Replies: 63
Views: 1693

Re: Slowest wind direct drive hub motor(s) available?

Balmorhea, Earlier in the thread you described two wheel and tire combos: https://endless-sphere.com/forums/viewtopic.php?f=3&t=108827&start=25#p1593452 One thing i can't help but wonder about is the spokes and rim on both wheels. Can you tell me what those are? Also direct drive or geared ...
by ebike4healthandfitness
Oct 28 2020 2:52am
Forum: EBike General Discussion
Topic: Slowest wind direct drive hub motor(s) available?
Replies: 63
Views: 1693

Re: Slowest wind direct drive hub motor(s) available?

Balmorhea, Earlier in the thread you described two wheel and tire combos: https://endless-sphere.com/forums/viewtopic.php?f=3&t=108827&start=25#p1593452 One thing I can't help but wonder about is the spokes and rim on both wheels. Can you tell me what those are ? Straight gauge or double but...
by ebike4healthandfitness
Oct 28 2020 12:07am
Forum: EBike General Discussion
Topic: Slowest wind direct drive hub motor(s) available?
Replies: 63
Views: 1693

Re: Slowest wind direct drive hub motor(s) available?

There are rolling resistance and handling penalties that come with very fat, low pressure tires. A wider tire doesn't have to be higher rolling resistance with poor handling. Hypothetically, you may be right. But in practice, a tire fat and soft enough to offset the ride shortcomings of a small dia...
by ebike4healthandfitness
Oct 27 2020 4:24pm
Forum: EBike General Discussion
Topic: Slowest wind direct drive hub motor(s) available?
Replies: 63
Views: 1693

Re: Slowest wind direct drive hub motor(s) available?

There are rolling resistance and handling penalties that come with very fat, low pressure tires. A wider tire doesn't have to be higher rolling resistance with poor handling. However, there is such a thing called "Fat bike" where the goal isn't to optimize for handling or rolling resistan...
by ebike4healthandfitness
Oct 27 2020 8:06am
Forum: EBike General Discussion
Topic: Slowest wind direct drive hub motor(s) available?
Replies: 63
Views: 1693

Re: Slowest wind direct drive hub motor(s) available?

If you want to get the very best from a hub motor, then use a small wheel Agreed ----> https://endless-sphere.com/forums/viewtopic.php?f=3&t=108781&start=75#p1593391 -- but it will beat you up. If the tire is narrow then yes the pressure will have to be high because the diameter is so small...
by ebike4healthandfitness
Oct 26 2020 2:03pm
Forum: EBike General Discussion
Topic: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?
Replies: 124
Views: 3202

Re: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?

It only takes 48V 25A controller in a 26" wheel for <=28mph Yes, 28 mph with a 26" wheel, 48v battery and 25 amp controller is possible with a Clyte H3548: https://ebikes.ca/tools/simulator.html?cont=C25&motor=M3548&mass=170&batt=B4816_GA&hp=0 .....but that same 25 amp con...
by ebike4healthandfitness
Oct 26 2020 9:58am
Forum: EBike General Discussion
Topic: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?
Replies: 124
Views: 3202

Re: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?

It only takes 48V 25A controller in a 26" wheel for <=28mph Yes, 28 mph with a 26" wheel, 48v battery and 25 amp controller is possible with a Clyte H3548: https://ebikes.ca/tools/simulator.html?cont=C25&motor=M3548&mass=170&batt=B4816_GA&hp=0 .....but that same 25 amp con...
by ebike4healthandfitness
Oct 25 2020 8:39pm
Forum: EBike General Discussion
Topic: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?
Replies: 124
Views: 3202

Re: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?

A) I would much rather have larger diameter winding wire that is shorter which means less resistance but it can take more power which means low turn count motors (3T, 4T etc) B) then a motor with thinner diameter winding wire that is longer which means more resistance can cant take as much power wh...
by ebike4healthandfitness
Oct 25 2020 8:01pm
Forum: EBike General Discussion
Topic: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?
Replies: 124
Views: 3202

Re: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?

All wheel diameter and motor winding combinations I matched up to produce the same top speed on flat ground, That's a sign that the speed is power limited and not motor RPM limited. It's likely that every one of those windings is faster than optimal for the voltage and current you specified. Kv was...
by ebike4healthandfitness
Oct 25 2020 12:19pm
Forum: EBike General Discussion
Topic: Slowest wind direct drive hub motor(s) available?
Replies: 63
Views: 1693

Re: Slowest wind direct drive hub motor(s) available?

If you want to get the very best from a hub motor, then use a small wheel Agreed ----> https://endless-sphere.com/forums/viewtopic.php?f=3&t=108781&start=75#p1593391 -- but it will beat you up. If the tire is narrow then yes the pressure will have to be high because the diameter is so small...
by ebike4healthandfitness
Oct 25 2020 9:36am
Forum: EBike General Discussion
Topic: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?
Replies: 124
Views: 3202

Re: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?

A) I would much rather have larger diameter winding wire that is shorter which means less resistance but it can take more power which means low turn count motors (3T, 4T etc) B) then a motor with thinner diameter winding wire that is longer which means more resistance can cant take as much power wh...
by ebike4healthandfitness
Oct 25 2020 7:57am
Forum: EBike General Discussion
Topic: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?
Replies: 124
Views: 3202

Re: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?

The difference need to be expressed as a percentage. If a slow winding does 30 mph at 72v it will have the same % speed drop at lvc as a fast winding doing the same top speed at 48v, simply because the fast winding will drop more rpm per volt, proportionally. Learn something everyday never thought ...
by ebike4healthandfitness
Oct 25 2020 12:25am
Forum: EBike General Discussion
Topic: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?
Replies: 124
Views: 3202

Re: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?

The difference need to be expressed as a percentage. If a slow winding does 30 mph at 72v it will have the same % speed drop at lvc as a fast winding doing the same top speed at 48v, simply because the fast winding will drop more rpm per volt, proportionally. Learn something everyday never thought ...
by ebike4healthandfitness
Oct 24 2020 12:09pm
Forum: EBike General Discussion
Topic: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?
Replies: 124
Views: 3202

Re: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?

All of the windings climb the same, have the same torque, same efficiency, and can run in the same size wheel. It only takes a different combination of voltage and current for the same power input to get the same torque, speed, and power out at the same efficiency. I can see your point after lookin...
by ebike4healthandfitness
Oct 24 2020 1:20am
Forum: EBike General Discussion
Topic: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?
Replies: 124
Views: 3202

Re: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?

The OP wants 750W and 20mph, but he for some reason wants to use 72V to do that. I think it's a bad idea Don't forget I want climbing as well. Climbing with the least chance of over heating. According to numbers I am getting from the ebikes.ca motor simulator higher voltage and lower amp controller...
by ebike4healthandfitness
Oct 23 2020 7:35pm
Forum: EBike General Discussion
Topic: Slowest wind direct drive hub motor(s) available?
Replies: 63
Views: 1693

Re: Slowest wind direct drive hub motor(s) available?

dogman dan,

There actually is a 72v 20amp controller?
by ebike4healthandfitness
Oct 23 2020 10:15am
Forum: EBike General Discussion
Topic: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?
Replies: 124
Views: 3202

Re: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?

The reason to do a high wind motor is using less amps and get better torque for fewer amps, fewer amps less heat. Does not mean you can get more torque from motor. Slower wind definitely does produce more torque. For example, compare and contrast Clyte H3525 and Clyte H3540 at 52v: https://ebikes.c...