Search found 407 matches

by toolman2
May 24 2018 10:16am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 2575
Views: 135595

Re: Sur-Ron - New Mid drive Bike

I don't consider anything to be "beyond useful range" if it works. Its a hotrod not a commuter. This setup has a ton of pulls on it, still working perfect. Well now i don't feel so bad about blowing a few hundred watts here and there on some of my wrong choices of motors or drivetrains for race bik...
by toolman2
May 22 2018 9:40am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 2575
Views: 135595

Re: Sur-Ron - New Mid drive Bike

Jackson is going to share some controller logs. We are sagging to our 45vdc LVC cut on a fully charged 21s pack. With so much sag you loose a lot of power. 45V would be 2,15V per cell :shock: I wonder why they went with 25R and not LiPos? Indeed, so something like 22kw dissipated as heat in the bat...
by toolman2
May 21 2018 8:16pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 2575
Views: 135595

Re: Sur-Ron - New Mid drive Bike

I was shocked to see the gps logs to see 70mph, as i mentioned earlier, it was on a slightly downhill straight. Field weakening is an incredible advantage in motors that play well with tons of "weakening", which seems like an absurd misnomer for something that costs no low speed performance and jus...
by toolman2
Feb 05 2018 7:42am
Forum: Motor Technology
Topic: Motor comparison spreadsheet
Replies: 552
Views: 47449

Re: Motor comparison spreadsheet

The 154mm outrunner as it came ordered as 35kv before rewind. (40 magnets, 36 teeth) and 4.9kg 0.0263 ohms. 33.6kv A picture is worth a thousand words :D Apologies for the delay larsb. There's a pic that i posted up with this stator a page or so back, and more of the whole motor on alibaba if that ...
by toolman2
Jan 31 2018 8:34am
Forum: E-Bike Non-hub Motor Drives
Topic: higher or lower kv
Replies: 40
Views: 3487

Re: higher or lower kv

Here is an example from real life circumstances. The same everything except kv (rpm/v). 1. QS 205 V3 kv11.89 battery 72v (200A consntant capable) Sabvoton 72150 (settings: 150A battery, 300A phase) rim 17'' 2. QS 205 V3 kv9.03 battery 72v (200A constant capable) Sabvoton 72150 (settings: 150A batte...
by toolman2
Jan 26 2018 9:37am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Suzuki GSX-R e899 K2
Replies: 293
Views: 27019

Re: Andre´s GSXR 1000 K2 with QS Motor 273 80H, 34kW

It seems you have enough room on top of the swing arm just in front of the rear tire to add a "mid"drive motor with a chain to the hub motor. That motor would also put some extra weight on the rear tire. A used motor and controller from a Zero motorcycle would be perfect. But even a 110V brushed mo...
by toolman2
Dec 03 2017 8:36am
Forum: Motor Technology
Topic: Motor comparison spreadsheet
Replies: 552
Views: 47449

Re: Motor comparison spreadsheet

About 98kv
by toolman2
Dec 03 2017 8:23am
Forum: Motor Technology
Topic: Motor comparison spreadsheet
Replies: 552
Views: 47449

Re: Motor comparison spreadsheet

Just to fill in the gaps: Joby JM1 0.01 ohms phase to phase. inductance 21.7uH. uses around 590w to do 8500rpm. JM1s 0.015 ohms inductance about 28uH used about 580w to do 8000rpm -it was an early one before they went to thinner 0.12mm lams. and the rest of the specs in the spreadsheet are correct. ...
by toolman2
Nov 30 2017 9:36am
Forum: Motor Technology
Topic: Motor comparison spreadsheet
Replies: 552
Views: 47449

Re: Motor comparison spreadsheet

The 120-100 or CA series motor (also with a bit more quality and watercooling as the colossus) is a pretty good motor, the Chinese style specs mean nothing im afraid -and this motor would be about 2 or 3% less efficient than the 154 motor but i don't think can be beaten for torque in the 120mm diame...
by toolman2
Nov 24 2017 7:02pm
Forum: Motor Technology
Topic: Motor comparison spreadsheet
Replies: 552
Views: 47449

Re: Motor comparison spreadsheet

Yep that's the same kind of motor speedmd, the one ive been working on is a 50mm stator version and has the skirt bearing -the one you have pictured is the 35mm i think. and you can get any of them on alibaba also. Yes, thats well put madin. and out of all of these types of motors, its the high pole...
by toolman2
Nov 16 2017 9:33am
Forum: Motor Technology
Topic: Motor comparison spreadsheet
Replies: 552
Views: 47449

Re: Motor comparison spreadsheet

Thanks speedmd, the d7500 is the same sort of design as those gng or bht type motors but its a fair bit bigger. The airgap is 90mm and a 60mm long stator and those outer bolt holes you can see in the case are 160mm apart, also the case is pretty long because there is a separate and adjustable hall a...
by toolman2
Nov 15 2017 9:00am
Forum: Motor Technology
Topic: Motor comparison spreadsheet
Replies: 552
Views: 47449

Re: Motor comparison spreadsheet

Hello Toolman2 do you have data about the 7500w btw motor? How we can have a joby motor? Yes no probs, the d7500w: Its 4 pole pairs 66.8KV (with a brushless rc controller) 0.0205 ohms And used only 98W to do 2627rpm from 39.3v inductance is pretty high at 87uH, and pole count is low so any controll...
by toolman2
Nov 09 2017 10:54pm
Forum: Motor Technology
Topic: Motor comparison spreadsheet
Replies: 552
Views: 47449

Re: Motor comparison spreadsheet, add simulator link?

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 direct...
by toolman2
Oct 06 2017 7:56am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 2663
Views: 89086

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Musk may not realise how "dangerous" some of his ideas are. ..Not physically neccessarily, but he has huge influence, so when he says something people respond and some blindly follow. ..such as the Solar+Storage battery total solution to utility power ! The whole Mars thing seems like a folly, or e...
by toolman2
Oct 05 2017 9:09am
Forum: E-vents
Topic: West Coast US Events
Replies: 226
Views: 33046

Re: West Coast US Events

Good information. So ebikes can run but they are not considered to be competing in the race for recognition or prizes. I still don't see a list of what "specs" are required about an ebike. Thanks. I have a funny old phone recording of the "motorbicycle" guy calling to try to badger and intimidate e...
by toolman2
Jul 20 2017 10:56am
Forum: E-Bike Non-hub Motor Drives
Topic: DD Hub as a mid drive motor pros and cons?
Replies: 120
Views: 10069

Re: DD Hub as a mid drive motor pros and cons?

I've tried to bring this topic up a few times related to mid-drives, but it never gained traction. The only time I've seen it brought up by someone in the know was Toolman2, who mentioned a "jacking effect" during acceleration that was noticeably different, but it was easy to become accustomed to i...
by toolman2
May 08 2017 9:49am
Forum: E-Bike General Discussion
Topic: Ebikes are for rebels....
Replies: 58
Views: 3791

Re: Ebikes are for rebels....

Meanwhile Luke comes in here and says he essentially doesn't recognize ANY of society's laws and you're on your knees ready to fellate him. Do I sense a double standard? :o This is gold flat tire. Thing is though everyone fellates Luke here, and why shouldn't they? he's a great guy. -Heck, catch me...
by toolman2
May 08 2017 8:00am
Forum: E-Bike Non-hub Motor Drives
Topic: LMX P2 : Freeride trials motorcycle frame development
Replies: 988
Views: 165779

Re: LMX P2 : Freeride trials motorcycle frame development

this. is. art. Yes unfortunately this now falls into the dreamers category for most people because who is going to spend this much for a bike. I myself am extremely disappointed that they are no longer producing the steel frames since it would have been the only thing I could afford, website is now...
by toolman2
Mar 10 2017 7:11am
Forum: E-Bike Build Threads / Photos & Video
Topic: Nyx frame, 273mm*40m V3 hub, and 650A
Replies: 162
Views: 18218

Re: Nyx frame, 273mm*40m V3 hub, and 650A

at 650 phase amps burst, i say 2-3 drag runs before you will feel motor saturation with no cooling installed. will you be doing any cooling mods to the motor?, or you going to break in the winding a bit, then think about adding it later :twisted: Any hub motor i've tried will usually start to feel ...
by toolman2
Mar 10 2017 5:53am
Forum: Motor Technology
Topic: wye - Delta -> differences and stereotypes
Replies: 58
Views: 5139

Re: wye - Delta -> differences and stereotypes

If the motor was built to be optimized in Wye, it will run like crap in Delta and make lots of heat. (No matter where your halls are timed) If the motor was designed to be optimized in Delta, terminating it in Wye will result in poor performance. (No matter where your halls are timed) If a Delta/wy...
by toolman2
Nov 25 2016 9:38am
Forum: E-Bike Non-hub Motor Drives
Topic: Any advice for controller for Joby motor for mid-drive appl
Replies: 6
Views: 818

Re: Any advice for controller for Joby motor for mid-drive a

Welcome 12-C, The Jm1 can be set up to start quite well under load, but its not easy to arrange, have a look at the photos here to get and idea. https://endless-sphere.com/forums/viewtopic.php?f=28&t=80516&p=1243501#p1243501 There are FAR easier ways to go i can safely say, mxus hubs are quite popul...
by toolman2
Nov 25 2016 9:13am
Forum: E-Bike Non-hub Motor Drives
Topic: #crossbreaks' midmotor CB120
Replies: 232
Views: 29399

Re: Custom RV120 for ebike use: group order Rv120-ES edition

For us not so techy guys I think this what we need. Most of us can do the mechanical parts of building mounts, gearing etc.... but the motor and controller quality, setup and rest of those details keeps most of us stuck on the bench. I do not have the full amount to buy the whole set up but could h...
by toolman2
Nov 10 2016 9:20pm
Forum: E-Bike Non-hub Motor Drives
Topic: #crossbreaks' midmotor CB120
Replies: 232
Views: 29399

Re: Custom RV120 for ebike use: group order Rv120-ES edition

Its been interesting to see the highly varied results people have reported using these motors from boisrondevens highly unlikely claim of 0 to 60 in under 2.5 seconds to very far from it with poor hall placement and even after adjustment, overheating even at low power levels. A few years ago when th...
by toolman2
Oct 23 2016 9:24am
Forum: Motor Technology
Topic: Racing and efficiency
Replies: 98
Views: 10872

Re: Racing and efficiency

Yep excellent work, that is a really awesome result!

-Any better you wont get invited back again. :wink:
by toolman2
Oct 12 2016 11:27pm
Forum: E-Bike Non-hub Motor Drives
Topic: higher or lower kv
Replies: 40
Views: 3487

Re: higher or lower kv

Ok, this has been done before, but lets do it again... find a motor on the sim with a kv of x. find the same motor but with a kv of 2x. Now, lets run motor x in a wheel size 2d, and motor 2x in a wheel size of d, but with their voltages equalized. Motor 2x can still handle 2x the current of motor x...