Search found 2977 matches

by madin88
Jan 13 2021 4:05am
Forum: E-Bike Non-hub Motor Drives
Topic: GNG / CYC X1 Pro 3000w
Replies: 696
Views: 94814

Re: GNG / CYC X1 Pro 3000w

I have just tried it without the torque sensor connected and I no longer have the running on it's own issue. Seems the torque sensor has some damage. Now the question is...can that cause the display to stop functioning correctly with the non responsive button presses and random headlight icon displ...
by madin88
Jan 13 2021 4:02am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1370
Views: 122990

Re: APL's DIY axial-flux motor

Remember, adhesive bonding is optimal for loading in shear, and sub-optimal for loading in tension or peel. So if there are any tensile or peel type loads, consider additional methods of fixing. As it looks, the two halves from the cores are held together with the countersunk screw so the glue woul...
by madin88
Jan 11 2021 7:09am
Forum: Battery Technology
Topic: Imbalance When Empty?
Replies: 14
Views: 289

Re: Imbalance When Empty?

IR, tab weld resistance/cold tab weld/hot weld, variance in thickness of tab metal, variance in solder thicknesses, wire gauge used, cells at the beginning or end of "S"eries.... .....between the cells will have a more drastic effect then it would at the left part of the charge, more char...
by madin88
Jan 09 2021 10:52am
Forum: E-Bike Technical
Topic: XT 90 antispark
Replies: 6
Views: 461

Re: XT 90 antispark

XT90s are made for RC model controllers which have lower voltage and way lower capacitance to precharge.

The resistor would have to be one with 50ohm or so that it doesn't blow when using it with 20s on big ebike controller.
by madin88
Jan 07 2021 5:57am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1370
Views: 122990

Re: APL's DIY axial-flux motor

I may not be able to have my cake and eat it too, so it may come down to that yet, but I'm still holding out for a motor that I can take apart and rework easily, as I have done with this one a few times already. Do you think that you can wind the coils when assembled? If so, then i can think of no ...
by madin88
Jan 06 2021 10:22am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1370
Views: 122990

Re: APL's DIY axial-flux motor

One issue is most epoxy types get pretty soft when hot. Yes it would have to be one of those "liquid steel" type epoxy like JB weld (can withstand 300°C) or something similar. When looking at Emrax motor and how the coils are mounted, it makes me think that it would fall apart without the...
by madin88
Jan 06 2021 8:26am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1370
Views: 122990

Re: APL's DIY axial-flux motor

The idea with the pins would allow to disassemble the cores again from the plate, but was wondering why it have to be like this? I would keep it simple and glue the cores with epoxy to the plate after cutting slots. There should be no airgap between the cores so there needs to be at least a small ga...
by madin88
Dec 11 2020 2:15pm
Forum: E-Bike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 445
Views: 43844

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

According to these figures I found for the sur ron battery, my state of charge should be 50% rather than 30%. I guess I'll keep draining it and see what voltage I have at the end of 2.8kwh, maybe my cells behave differently than the surron panasonics 20201211_132358.jpg From where do you have these...
by madin88
Dec 03 2020 2:05pm
Forum: E-Bike Non-hub Motor Drives
Topic: GNG / CYC X1 Pro 3000w
Replies: 696
Views: 94814

Re: GNG / CYC X1 Pro 3000w

Sometimes the PAS needs massive amounts of torque to kick in, a quick unplug and plug in cures this. I wonder if at times I have had pressure on the crank when plugging in and this somehow effects the sensor upon powering on...perhaps it "zeros" itself each start up? Ahh thats shit, which...
by madin88
Dec 01 2020 12:27pm
Forum: E-Bike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 445
Views: 43844

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

Will this present a problem? Will the auto setup compensate for this? I did something similar and it works well with Nucular, so a few degree + or - should be no problem. Nice design :thumb: https://endless-sphere.com/forums/viewtopic.php?f=30&t=91144&start=25 The answer to this will determ...
by madin88
Nov 13 2020 11:55am
Forum: E-Bike Technical
Topic: MAC speed sensor adding
Replies: 20
Views: 543

Re: MAC speed sensor adding

Grin has done such a mod: https://ebikes.ca/product-info/grin-kits/gmac.html Thou it is unclear on where they positioned it. I recently opened my motor (mac 10T) to check wiring and so on, it is alot of space to do mods, but you would need a hall sensor and then position 1 or 2 magnets in the top c...
by madin88
Nov 12 2020 6:58am
Forum: E-Bike General Discussion
Topic: E-S LMX 64 Bike Owners
Replies: 1024
Views: 90261

Re: E-S LMX 64 Bike Owners

Cowardlyduck wrote:
Nov 11 2020 6:01am
Is it worth getting them heat treated or with a color finish?
If heat treatment means that it will be hardened then it would be a good thing.
by madin88
Nov 11 2020 6:14am
Forum: E-Bike General Discussion
Topic: E-S LMX 64 Bike Owners
Replies: 1024
Views: 90261

Re: E-S LMX 64 Bike Owners

I have the 30mm stator. I would change to the 40mm if I had too. If it never overheated than with the 40mm motor there would be 30% more torque available and you could change from 14T to a 18T (30% more teeth) which would increase lifetime of components many times and further reduce noise. Belt len...
by madin88
Nov 10 2020 2:37pm
Forum: E-Bike General Discussion
Topic: E-S LMX 64 Bike Owners
Replies: 1024
Views: 90261

Re: E-S LMX 64 Bike Owners

Joe wrote:
Nov 10 2020 12:15pm
I want a 16 tooth pulley for my belt drive. My motor has never over heated, my motor has never struggled, my rear pulley shows no wear. It‘s always the front. bigger pulley please.
The motor you have is it with 30mm stator or 40mm?
by madin88
Nov 08 2020 4:26am
Forum: Motor Technology
Topic: Winding Question: does STAR make more torque than DELTA, even with adjusted phase current?
Replies: 44
Views: 2713

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

Probably have to consider saturation at some point... now I've got FOC actually running. I can imagine that BEMF will change and that there will be more torque ripple since the torque from the peak currents will be cut off somewhere. If you look here in ES to those using Hubdrive than almost everyo...
by madin88
Nov 08 2020 3:44am
Forum: Motor Technology
Topic: Winding Question: does STAR make more torque than DELTA, even with adjusted phase current?
Replies: 44
Views: 2713

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

What motor and how are you not running into heat problems? Hi John, it the Neumotor 8057-75kv There is a thread about my project with this motor and a few others here have been using it too. https://endless-sphere.com/forums/viewtopic.php?f=30&t=91144&start=125#p1486864 Yes it heats up in n...
by madin88
Nov 01 2020 9:39am
Forum: Motor Technology
Topic: Winding Question: does STAR make more torque than DELTA, even with adjusted phase current?
Replies: 44
Views: 2713

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

Thanks for your input. Ive seen that you work on your own VESC controller so i am happy that you share your knowledge here :thumb: :) Looking to the fundamentals of an AC synchronous motor, the torque is the cross product of the magnetic flux vector in the stator (produced by the current flowing in ...
by madin88
Nov 01 2020 8:52am
Forum: Motor Technology
Topic: Winding Question: does STAR make more torque than DELTA, even with adjusted phase current?
Replies: 44
Views: 2713

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

with delta utilizing all three phases at once while star is only using 2 (right?) wouldnt the delta allow higher max torque as it can distribute the magnetic field through more teeth and therefore less likely to saturate? There is always the situation, no matter if delta or star, where one winding ...
by madin88
Oct 29 2020 1:49pm
Forum: Motor Technology
Topic: Winding Question: does STAR make more torque than DELTA, even with adjusted phase current?
Replies: 44
Views: 2713

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

It assumes same speed of course, so battery voltage doesn't really matter that much as speed is determined by the "apparent voltage" to the motor so as long as battery voltage is sufficiently high. That means you could run same pack voltage and partial throttle on the higher Kv motor for ...
by madin88
Oct 29 2020 1:31pm
Forum: Motor Technology
Topic: Winding Question: does STAR make more torque than DELTA, even with adjusted phase current?
Replies: 44
Views: 2713

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 madin88
Jul 31 2020 5:22am
Forum: Motor Technology
Topic: BAC800 vs. Neumotors 8025
Replies: 5
Views: 481

Re: BAC800 vs. Neumotors 8025

What is the ERPM limit of ASI?

At 8000RPM it would be 64000ERPM (8 pole pairs) which could be to high for the controller.
by madin88
Jul 28 2020 2:38am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1370
Views: 122990

Re: APL's DIY axial-flux motor

The rotors should not be able to be anything but straight, so that's another part of the problem, and another reason why I'm having such a problem getting things centered. Evidently the six small spacers I have are a bad design, and need to be extended into three long ones that use the same bolt ho...
by madin88
Jul 20 2020 1:00am
Forum: Motor Technology
Topic: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+
Replies: 173
Views: 37912

Re: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+

nowholeself wrote:
Jul 19 2020 4:01pm
Neumotors 8025 with factory installed hall sensors.WIN_20200719_13_58_28_Pro.jpg
Thats nice to see. Did you spin it up already and does it run smooth?
Would you mind to share more photos of the hall board (with the rotor removed)?