Search found 14553 matches

by John in CR
Nov 01 2020 7:34pm
Forum: EBike General Discussion
Topic: Shopping list
Replies: 44
Views: 1036

Re: Shopping list

I'm supposed to be looking at mountain bikes exclusively correct? If you still have the plan to go really fast, then you don't want to do that on an aluminum frame from some cheapie bike or cheap ebike. What you'd really want is either a good brand downhill bike or a bike made out of steel. Also, f...
by John in CR
Nov 01 2020 7:21pm
Forum: EBike General Discussion
Topic: The downside of more electric bikes
Replies: 32
Views: 1222

Re: The downside of more electric bikes

The only downside will be once there are enough that we're competing for the same space on the road. It's already happening. And, I've noticed that a similar cross section of riders exists as there are drivers. The clueless ones, the aggressive ones, etc., plus a lot of first time riders, electric ...
by John in CR
Nov 01 2020 9:22am
Forum: EBike General Discussion
Topic: The downside of more electric bikes
Replies: 32
Views: 1222

Re: The downside of more electric bikes

The only downside will be once there are enough that we're competing for the same space on the road.
by John in CR
Oct 31 2020 1:14pm
Forum: Motor Technology
Topic: Enertrac hub motor cutting out
Replies: 27
Views: 1673

Re: Enertrac hub motor cutting out

Quick update: Mark from Enertrac saw one of my video's and thought there was a possibility that the magnet ring inside the hub motor was spinning. He offered to fix it free of charge. To check this, I pulled off one of the side covers and marked the magnet ring against the hub body with a marker. I...
by John in CR
Oct 31 2020 5:40am
Forum: EBike General Discussion
Topic: Battery Range Question
Replies: 15
Views: 725

Re: Battery Range Question

Hot new vendor in LiPo's... and blowing everyone out of the water on value for money... Few have the discipline that MadRhino has with his batteries. Far too many experienced users here on the forum have had RC Lipo fires, so they have negative value for any amount of money, and to suggest their us...
by John in CR
Oct 31 2020 3:06am
Forum: Electric Aircraft
Topic: Self-launching sailplane conversion
Replies: 23
Views: 1287

Re: Self-launching sailplane conversion

...Any opinions here on these guys? https://mad-motor.com/product/mad-torq-m40-c30-pro-kv43/ They may well be built tough, but their claims of high efficiency are drastically overstated. The no-load current is quite high even though they listed it at an rpm using only 30V. It would be over 3 times ...
by John in CR
Oct 31 2020 1:52am
Forum: EBike Technical
Topic: raising voltage to maximize regen. braking?
Replies: 56
Views: 2760

Re: raising voltage to maximize regen. braking?

The easy way to increase regen if the program setting is already maxed out is to do a shunt mod to trick the controller into raising the current limit of regen. Then lower the current limits for forward motion to tune it back down to the acceleration you already have. Since braking force is limited ...
by John in CR
Oct 31 2020 1:42am
Forum: EBike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 512
Views: 50674

Re: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

It's definitely in FOC. I don't know why anyone would want to use any other mode, so I don't know about them. FOC is smoother and more efficient, but square/trap can potentially output higher peak torque/power for a given set of MOSFETs. So if you were going for outright performance, potentially sq...
by John in CR
Oct 30 2020 7:05pm
Forum: EBike General Discussion
Topic: Two battery packs- One for torque, one for speed
Replies: 15
Views: 516

Re: Two battery packs- One for torque, one for speed

I see, I looked at the simulator and seems like I've been misunderstanding how this stuff works. So a voltage increase not only increases speed and rpm, but torque as well? Increasing voltage with everything else the same ends up increasing torque a bit through the mid-range speeds, because the tor...
by John in CR
Oct 30 2020 5:32am
Forum: Motor Technology
Topic: Winding Question: does STAR make more torque than DELTA, even with adjusted phase current?
Replies: 44
Views: 2995

Re: Winding Question: does STAR make more torque than DELTA, even with adjusted phase current?

Hummina Shadeeba wrote:
Oct 30 2020 1:02am
In my obsessive quest to get the most copper in a motor winding LRK with wye showed best when just looking at how much useful wire can be gotten in and that’s likely the biggest benefit
Fitting maximum copper is definitely the best goal.
by John in CR
Oct 30 2020 5:23am
Forum: EBike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 512
Views: 50674

Re: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

square mode does not use hall sensors I don't think that is correct. In my understanding (for Nucular controller): - "Square" mode uses halls at all speeds. - "Sensorless" uses BEMF feedback only, and not halls. - "Combined" uses halls for startup, and changes to senso...
by John in CR
Oct 30 2020 5:17am
Forum: EBike General Discussion
Topic: Slowest wind direct drive hub motor(s) available?
Replies: 63
Views: 1867

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

Some 12 years later I am still riding the best 2 of them that had been mod a few times. The others had been sold and still riding. 2 is a good number. No bike will do it all, so in the end, having an off road and a road going version seems best for someone that likes both types of riding. I'm reall...
by John in CR
Oct 30 2020 5:09am
Forum: EBike General Discussion
Topic: Two battery packs- One for torque, one for speed
Replies: 15
Views: 516

Re: Two battery packs- One for torque, one for speed

Partial throttle at the high voltage works exactly the same as full throttle at the lower voltage. Ya, looks pretty darn close https://ebikes.ca/tools/simulator.html?motor=MGRIN2708_SA&batt=cust_40_0.2_30&cont=cust_50_100_0.03_V&hp=0&axis=mph&cont_b=cust_20_40_0.03_V&motor_b...
by John in CR
Oct 30 2020 1:06am
Forum: EBike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 512
Views: 50674

Re: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

DanGT86 wrote:
Oct 29 2020 10:35pm
Is that true for all modes like square and foc or just combined mode?
It's definitely in FOC. I don't know why anyone would want to use any other mode, so I don't know about them.
by John in CR
Oct 29 2020 10:29pm
Forum: EBike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 512
Views: 50674

Re: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

DanGT86 wrote:
Oct 28 2020 1:48pm
I need to get a scope on my hall signals before anything else to rule that out so Im not chasing my tail.
The halls are taken out of the equation at relatively low rpm, after which the controller runs sensorless, so any problems related to halls should only occur on take-off.
by John in CR
Oct 29 2020 10:23pm
Forum: EBike General Discussion
Topic: Two battery packs- One for torque, one for speed
Replies: 15
Views: 516

Re: Two battery packs- One for torque, one for speed

Partial throttle at the high voltage works exactly the same as full throttle at the lower voltage. Neither has any torque advantage either. The difference in any losses in the controller are miniscule, and what goes down the phase wires to the motor is the same either way, so don't bother and just s...
by John in CR
Oct 29 2020 9:10pm
Forum: Motor Technology
Topic: Winding Question: does STAR make more torque than DELTA, even with adjusted phase current?
Replies: 44
Views: 2995

Re: Winding Question: does STAR make more torque than DELTA, even with adjusted phase current?

Are you running Hall sensors or sensorless? Isn't there a phase difference between wye and Delta? If running sensors, you might have to re set the phase advances, otherwise you'll push huge current and just generate a useless field. I know nothing of this nucular controller and how it works... Just...
by John in CR
Oct 29 2020 8:39pm
Forum: Motor Technology
Topic: Winding Question: does STAR make more torque than DELTA, even with adjusted phase current?
Replies: 44
Views: 2995

Re: Winding Question: does STAR make more torque than DELTA, even with adjusted phase current?

Nope. Regardless of winding or termination, to make more torque means more heat, and making the same torque makes the same heat, and making less torque makes less heat. Same heat produced for a given torque output regardless of kv but what of efficiency in the motor: with a lower kv (higher kt) mot...
by John in CR
Oct 29 2020 9:57am
Forum: Motor Technology
Topic: Winding Question: does STAR make more torque than DELTA, even with adjusted phase current?
Replies: 44
Views: 2995

Re: Winding Question: does STAR make more torque than DELTA, even with adjusted phase current?

And wouldn’t it be much more efficient in the motor when at low speeds and a low kv it would be less amps to get a needed torque than if higher kv. Nope. Regardless of winding or termination, to make more torque means more heat, and making the same torque makes the same heat, and making less torque...
by John in CR
Oct 28 2020 11:08pm
Forum: Motor Technology
Topic: Winding Question: does STAR make more torque than DELTA, even with adjusted phase current?
Replies: 44
Views: 2995

Re: Winding Question: does STAR make more torque than DELTA, even with adjusted phase current?

And wouldn’t it be much more efficient in the motor when at low speeds and a low kv it would be less amps to get a needed torque than if higher kv. Nope. Regardless of winding or termination, to make more torque means more heat, and making the same torque makes the same heat, and making less torque...
by John in CR
Oct 28 2020 9:16pm
Forum: Motor Technology
Topic: Winding Question: does STAR make more torque than DELTA, even with adjusted phase current?
Replies: 44
Views: 2995

Re: Winding Question: does STAR make more torque than DELTA, even with adjusted phase current?

If all settings equal other than phase current limit, then current is ramping up at the same rate, so the higher current takes a longer period to reach there. Also, some motors are wound in a manner that they work properly in only one type of termination. I remember when some guys were exploring St...
by John in CR
Oct 28 2020 8:57pm
Forum: EBike General Discussion
Topic: Shopping list
Replies: 44
Views: 1036

Re: Shopping list

100 mph maximum. Thanks, I needed that! :lol: I'm the only one I know of on the forum with 100mph+ ebikes, and I'm not selling any of the 6 hubmotors I have that will do that speed. One member built an emoto for the drag strip that exceeded my top speed of 113mph, but that was a double wide QS273 h...
by John in CR
Oct 28 2020 12:57am
Forum: EBike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 512
Views: 50674

Re: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

I believe you could greatly limit the spin of the front wheel by adjusting the acceleration limit setting of the controller for the front wheel. I seem to recall the name of the item being "Maximum Safe Acceleration" in the menu.
by John in CR
Oct 27 2020 12:30pm
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: 3536

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

A fallacy that defies the laws of physics unless the energy expended for transportation also replaces exercise that would be done if not cycling. I tried to look it up, but all I could find was energy expenditure for cycling clearly written for someone who want to maximize it - and in the better so...
by John in CR
Oct 26 2020 9:09pm
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: 3536

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

donn wrote:
Oct 26 2020 8:00pm
...the bicyclist exists and consumes his fuel regardless.
A fallacy that defies the laws of physics unless the energy expended for transportation also replaces exercise that would be done if not cycling.