Search results for query: winding spreadsheet

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  1. S

    High Torque, low RPM motor source or build

    Greetings - I've lurked on here for years. Years ago I remember seeing a very good thread about DIY motor builds which included a spreadsheet with a matrix within it comparing pole winding and magnet counts for best performance. it was specifically for low speed, high torque applications with...
  2. SafeDiscDancing

    Rewinding a 15470 outrunner

    My motor threw a wire and fried just recently. https://endless-sphere.com/forums/viewtopic.php?f=30&t=114604 ...looks like it was a case of the Stock winding being too loose. Anyway I would suggest that bigger wires are more difficult to wind with when the corners are very sharp. If you...
  3. T

    DIY Toroidal Axial Flux PM

    That's great :thumb: I was actually thinking about comparing ditributed (like we are doing with toroidal winding) and concentrated so that will help :) About that ... Just found out that they were a python FEMM implementattion called pyFEMM (https://www.femm.info/wiki/pyFEMM). It's a bit...
  4. T

    DIY Toroidal Axial Flux PM

    Your corelless statosr are looking really good ! :shock: Happy to see someone else inspired by Ben katz axial flux build, I've been following APL's build also for quite some time and find it really inpiring. Since you presented yourself I might do the same : I did mechanical engineering...
  5. HalbachHero

    DIY Toroidal Axial Flux PM

    Thanks for all the suggestions. I will have to add the shaft to this motor to balance it the way that was suggested, but after playing around with it a bit, I feel that the issue might not be balance. I think a lot of the vibration is coming from the rotors wobbling. I'm equating this to them...
  6. HalbachHero

    DIY Toroidal Axial Flux PM

    I found an alternative solution which is just to force the number of stator poles pairs to be less than that of the rotor poles. This way it will never extend beyond. But you are still able to model a variable number of poles. I changed the Poles to be pole pairs too, so that it makes sense that...
  7. J

    Hubmonster 94% efficient 7kw NO LONGER FOR SALE

    Actually, because cogging losses are mostly fixed, increasing voltage commonly increases the peak efficiency of the motor. That doesn't necessarily mean in real use that you can achieve that peak efficiency, but that's because wind resistance increases geometrically, so peak motor efficiency...
  8. amberwolf

    Hall Sensors'b'Gone

    Sure; that's something I can try even while the motor is not connected to the SFOC5 (until I can do the phase wire and winding repair, which will hopefully be in the next few days). (Assuming the LED status lights will still show battery status regardless of other errors, like anything that...
  9. markz

    Two chains on triple crankset? Gonna rub or not?

    No, the first spreadsheet is to get an idea of the effective wheel diameter with different gears from the motor gear, to the two crank gears to the rear wheel gears. You can see how on line 41 it goes from 11.556 for hill climbing ability all the way up to 37.818" in effective wheel diameter...
  10. J

    Revolt RV-series motor review and comparisons

    EG, Great job on the physical review of the motor. Pick up a cheap inductance meter on ebay. It's good to check inductance and resistance phase-to-phase each way to make sure there's no mistakes in the winding (impossible to check visually), and the resistance is a critical measurement in...
  11. cycborg

    New 2017 updates to ebikes.ca motor simulator to try out

    Justin explains this here, for all the parameters except inductance. If you don't have access to the appropriate meter for that, you can look for a similar motor in Miles' spreadsheet and use its number as a rough guess, and experiment with how changing the number affects your results. Edit...
  12. DanGT86

    Custom 80100 RC Drive on Genesis Swing-arm

    It was a super common motor a few years back so there are tons of threads with various detailed specs. The problem is you just have to find them. Google searching this site seems to work better than using the ES search feature. I got my motor from Luna. They usually have them in stock but they...
  13. justin_le

    Motor comparison spreadsheet

    Just an idea here but since we've now added the ability to input a custom motor on the ebike simulator page ( see https://endless-sphere.com/forums/viewtopic.php?p=1324922#p1324922 ), you could in principle add a column to this spreadsheet that uses the string and math functions to produce a...
  14. Rix

    MXUS coming out with a 5K-Turbo motor, 55mm Magnets

    I guess my next question would be: Is Kinaye Motorsports going to be getting these in and if so, when? And do you think I can get a 25x4T wind?
  15. Glyn

    Hall Sensor or Phase wire making my electrics burn? (With video)

    Thanks for everybody's input, this is really helpful. Have updated the images in my original posts. The motors are 48v 500w Mac 536hf 1:5 geared motors with a 20T winding (not advertised on their website) 32 magnet 16 pair poles. According to Mac, their rated current is 10a and max current is...
  16. justin_le

    Optimal Hub Motor design? Break down of BionX D-Series

    That's exactly what this is about: The data would be better if you had more data points on the no load power draw over a wider range of RPMs, but from the 3 data points you gave it looks to be about 0.008 Nm of eddie current drag for each rad/sec of wheel speed, and yes that is very much part...
  17. T

    Motor comparison spreadsheet

    Yep, sounds like a good plan Justin. I should have the measured inductance of the JM1S motor somewhere, and have plenty of data from the longer JM1 shown. It would be very interesting to see if we can replicate (on your simulator) the goings on at the track with this motor when approaching both...
  18. justin_le

    New 2017 updates to ebikes.ca motor simulator to try out

    We'll work on fixing that! ( https://endless-sphere.com/forums/viewtopic.php?p=1333447#p1333447 ) The inductance is an interesting term in the simulation when you are using either a trapezoidal controller or a standard sinewave controller since it restricts the ability of the current to reach...
  19. M

    Is my project salvageable?

    I'll run through what I've got in my spreadsheet. The motors have a 6:1 reduction planetary gearbox built in, so I'm starting with 500 RPM at the motor shaft and 9.2 lbf*ft of torque for each motor. 11t motor sprockets to 18t jackshaft sprockets, to 12t to 24t on the axles. That's a 3.27:1...
  20. MexicanElmo

    Analysis of regen on an ebike

    Hello! thanks, I wasn't aware of your simulator, it's really neat indeed. Actually I was doing some calculations on a spreadsheet but this saved me lots of time. Now let me tell you, that I wasn't trying to mimic a normal ebike, I was trying to boost my leg power, hence I used ebike parts as it...
  21. crossbreak

    8.4KG CROMOTOR & COMPARISON OF V1,V2,V3

    Subject: Motor comparison spreadsheet
  22. teslanv

    MXUS 3000 Hub Motor - V1 V2 V3

    Posted this in another Thread a while back ... And here is the excel spreadsheet I developed so you can calculate and compare unloaded speed and torque, given Motor winding, volts, Phase current and tire size.
  23. speedmd

    Motor comparison spreadsheet

    Thanks. Makes a bit more sense with that. Will need to work out the numbers a bit on the spread sheet to get more comfy with the whole topic. The whole idea of torque sensitivity and constants is a very interesting way to look at motors. One thing that still makes me dig into a motors...
  24. teslanv

    Direct Drive Hub Motor Calculator - Kv, Kt, Speed, Torque

    I have been slowly improving upon the excel spreadsheet I developed for the MXUS Direct Drive Hub Motors, including the XF40-45H 3000W motors and the XF40 27mm 1000W motors. I have come up with what I believe is a very accurate model of the relationship of Kv and Kt based on the winding pattern...
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