Search found 44 matches

by bunya
Feb 05 2017 6:32am
Forum: E-Bike Non-hub Motor Drives
Topic: 1680 Cyclone Drive - High Amperage Draw?
Replies: 4
Views: 694

Re: 1680 Cyclone Drive - High Amperage Draw?

Hi,

There is a motors spreadsheet (i think it was done by Miles) with the cyclone 1680 motor. From memory no load was 1.5A @ 54v. I recorded the numbers without the planetary gearbox. Is too high.

Jake
by bunya
Oct 26 2016 5:45am
Forum: E-Scooter and Motorcycle General Discussion
Topic: QS Motor Mid Drive
Replies: 11
Views: 1455

QS Motor Mid Drive

I've noticed that QS Motor are putting together a mid drive scooter/moto swingarm package. It looks pretty cool and will be interesting to see if anyone has plans to use it for a conversion. http://www.cnqsmotor.com/en/article_read/(Pre-selling)%20New%20QS%20Motor%202000W%20Mid%20Drive%20Motor%20Kit...
by bunya
Jan 15 2016 12:09am
Forum: Motor Technology
Topic: Motor comparison spreadsheet
Replies: 552
Views: 56205

Re: Motor comparison spreadsheet

jk1 wrote: For the cyclone 1680w motor no load measurement did you try it without the motor seal ? Most motors do not have a seal whereas that one does. Also IPM design has LESS eddy current losses not more, and its the reason why Zero motorcycles went to them this year , here is a video of the ben...
by bunya
Dec 22 2015 1:21am
Forum: Motor Technology
Topic: Motor comparison spreadsheet
Replies: 552
Views: 56205

Re: Motor comparison spreadsheet

Measured across two phases with the third open Rm is 0.060 Ohms, inductance is 154 uH if that's any use.
by bunya
Dec 21 2015 2:30am
Forum: Motor Technology
Topic: Motor comparison spreadsheet
Replies: 552
Views: 56205

Re: Motor comparison spreadsheet

I asked myself a similar question about the high losses in no-load condition. I don't think Rm has much to do with it though, copper losses are less than 1W at 6000rpm whereas total losses are approx 150W. My guess is the IPM design with the embedded magnets results in more hysteresis losses (97w) w...
by bunya
Dec 17 2015 1:12am
Forum: Motor Technology
Topic: Motor comparison spreadsheet
Replies: 552
Views: 56205

Re: Motor comparison spreadsheet

ScreenShot040.png I notice the no load current isn't included in Column AJ . For example, with the cyclone figures I uploaded no load is approximately 2.85A at 6000rpm (Sinusoidal) and at no load efficiency is 0%. Yet the table shows that for 6000rpm efficiency is ~40% at 1.92A, I'm guessing this m...
by bunya
Dec 06 2015 10:29pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Welcome to the Electric Horsemen
Replies: 84
Views: 12361

Re: Welcome to the Electric Horsemen

Incredible work Simon, it will be an impressive feat getting this bike registered as a Moped, all the best with testing!
by bunya
Nov 23 2015 6:30pm
Forum: E-Bike Build Threads / Photos & Video
Topic: DH dual motor = LR mid drive + Grin all-axle front hub
Replies: 285
Views: 43698

Re: Intense M6 FRO Lightning Rod's big block 20s2p

This thread is always on the move, exciting stuff happening. As others have mentioned, the most common torque controllers are the Kellys, though running 20s might mean only a larger one will fit. If you could set it up through the CA that would be ideal but I know nothing about them.
by bunya
Nov 23 2015 5:00pm
Forum: Motor Technology
Topic: Motor comparison spreadsheet
Replies: 552
Views: 56205

Re: Motor comparison spreadsheet

Doesn't Tesla already have a large reduction between the motor and the diff to allow the motor to spin faster and increase the power density?
by bunya
Nov 20 2015 2:15am
Forum: E-Bike Build Threads / Photos & Video
Topic: DH dual motor = LR mid drive + Grin all-axle front hub
Replies: 285
Views: 43698

Re: Intense M6 FRO Lightning Rod's big block 20s2p

Hi John, I have a similar problem with my controller. These basic greentime controllers are simply speed controllers rather than torque controllers so when we ask for throttle they will give massive amounts of torque until the throttle speed is reached. Torque controllers are more suitable on the re...
by bunya
Nov 10 2015 6:21pm
Forum: Stand-up E-scooters and E-skateboards
Topic: hubmotor pros/cons
Replies: 31
Views: 2965

Re: hubmotor pros/cons

I think one thing that was overlooked in the above discussion is the practical ability of climbing hills with "different Kv motors at different speeds" I am only relating this to hub motors because there is no option for gearing (yet :) ). There shouldn't be any doubt that for a given size motor cla...
by bunya
Nov 05 2015 11:00pm
Forum: Motor Technology
Topic: Motor comparison spreadsheet
Replies: 552
Views: 56205

Re: Motor comparison spreadsheet

For the cyclone motor I have run the motor on the scope manually with a drill to determine the kV The scope gave out four readings: Voltage pk-pk --> Kv = 122.5 rpm/V Voltage RMS/.707 --> Kv = 127 rpm/V Voltage Amp --> Kv = 125.5 rpm/V Frequency 40Hz, 50Hz, 61Hz and 92Hz I found the pk-pk voltage ga...
by bunya
Nov 02 2015 2:48am
Forum: Motor Technology
Topic: 5KW or more in a 10 inch scooter rim.
Replies: 6
Views: 958

Re: 5KW or more in a 10 inch scooter rim.

Just noticed they had a weird dual stator version... probably too wide considering you've already check out the supplier.
http://qsmotor.en.alibaba.com/product/6 ... Motor.html
by bunya
Nov 01 2015 1:45am
Forum: E-Bike Non-hub Motor Drives
Topic: Dave's 80:1 RC mid drive kit build log
Replies: 1409
Views: 186644

Re: Dave's 80:1 RC mid drive kit build log

The kit looks awesome Dave, great to see your progress, its also funny how the sounds is somewhat like a two stroke. Strange question, if some people wanted reduced sound would it be possible to incorporate software with a current ripple that phases out the cyloidal drive harmonics? Could be a cool ...
by bunya
Oct 29 2015 5:13pm
Forum: Motor Technology
Topic: New Kelly pseudo FOC controller series
Replies: 509
Views: 61363

Re: New Kelly FOC controller series

Not sure, if the controller has variable regen then it could be a possibility, though I couldn't see that on the Kelly site.
by bunya
Oct 28 2015 10:32pm
Forum: Motor Technology
Topic: New Kelly pseudo FOC controller series
Replies: 509
Views: 61363

Re: New Kelly FOC controller series

Also thanks for taking to testing this controller. I did check out the pulsing/overshoot to 100km/h video you posted, maybe this is related to running at sensored mode even at high speed as you said, strange... Maybe it is actually using the halls but is not technically an FOC controller, quite inte...
by bunya
Oct 28 2015 9:30pm
Forum: Motor Technology
Topic: New Kelly pseudo FOC controller series
Replies: 509
Views: 61363

Re: New Kelly FOC controller series

Ok, I guess it didn't seem clear enough to me that it 'ALWAYS' used halls. The response from fany said that it's 'discrete' from start up which to me indicates halls and 'continuous' after speed up which to me indicates back EMF. I think when he says the KLS 'can not support sensorless ... for now' ...
by bunya
Oct 27 2015 8:10pm
Forum: Motor Technology
Topic: New Kelly pseudo FOC controller series
Replies: 509
Views: 61363

Re: New Kelly FOC controller series

So I've had a bit of a read through this thread and will be getting a FOC controller soon, so here are a couple comment that I hope are helpful. The fact that the new kelly is spinning your motor slower than a trap wave controller should be seen as a positive, it shows that it is indeed FOC. The 3rd...
by bunya
Oct 25 2015 6:53pm
Forum: E-Bike Non-hub Motor Drives
Topic: Cyclone or GNG mid drive kit?
Replies: 78
Views: 9480

Re: Cyclone or GNG mid drive kit?

I have the standard cyclone/headline motor with external controller '1680W kit', it uses the 148mm ISIS bb. For the most part I've been having a great time with it, next I'll try a sine wave controller to reduce the noise.
by bunya
Oct 23 2015 8:19pm
Forum: E-Bike Non-hub Motor Drives
Topic: Cyclone or GNG mid drive kit?
Replies: 78
Views: 9480

Re: Cyclone or GNG mid drive kit?

Hi, I know it might be a bit late now but I would steer clear of the 190mm BB and get the 1800-3000W with the 148mm BB. I think if you plan on using it on a few jumps it will eventually bend and the chain will drop. The kit will never be perfectly true to begin with so it wouldn't have to bend much ...
by bunya
Oct 21 2015 2:49am
Forum: Motor Technology
Topic: Cyclone kit motor problem
Replies: 9
Views: 983

Re: Cyclone kit motor problem

I'm not sure how the internal controller model works, but I am certain the LVC is in the ORO throttle on the external model, it pulls down ebrake when voltage is low and this is what stops the motor from working. If you are running your lifepo4 pack down into the red you could be damaging the cells,...
by bunya
Oct 20 2015 7:53pm
Forum: E-Bike Technical
Topic: E bike controller question
Replies: 12
Views: 1216

Re: E bike controller question

Just to clarify, the controller is as the OP mentioned for an older brushed motor. It appears that only 4 of the N channel Mosfets are used to control the current to the motor. The middle (odd one out) TO-220 chip could be a diode it appears that one of it's legs goes to motor negative. The TO-220 c...
by bunya
Oct 20 2015 7:00pm
Forum: Motor Technology
Topic: Cyclone kit motor problem
Replies: 9
Views: 983

Re: Cyclone kit motor problem

The LVC for my cyclone controller is in the ORO throttle, it has a small microcontroller inside that changes the lights from green to orange to red. Do you have access to a lab power supply, perhaps you could test the motor and controller over a range of voltages? my 48v kit disconnects at about 35 ...
by bunya
Oct 18 2015 11:26pm
Forum: E-Bike Technical
Topic: Definitive Tests on the Heating and Cooling of Hub Motors
Replies: 2098
Views: 366874

Re: Definitive Tests on the Heating and Cooling of Hub Motor

My interpretation... for high power applications the thermal transfer between the stator and the rotor/case can be improved by increasing windage losses. In the design of motors the windage loss factor between the stator and rotor plays a large role in continuous power rating, if keeping the motor s...
by bunya
Oct 15 2015 5:43pm
Forum: E-Bike Non-hub Motor Drives
Topic: Cyclone or GNG mid drive kit?
Replies: 78
Views: 9480

Re: Cyclone or GNG mid drive kit?

When you refer to cyclone 3kW do you mean the newer one on their website: 1800-3000W kit with the 148mm BB or the older wider 1920-3000W kit with the 190mm BB. Just thought it'd be worth mentioning because a 190mm BB will be more of a hassle. I have the older cyclone with the steel gears, it's relia...