Search found 501 matches

by Emoto
Jan 22 2019 8:32am
Forum: Motor Technology
Topic: SPM VS IPM Motor - And Field weaken, is it worth it
Replies: 83
Views: 1963

Re: SPM VS IPM Motor - And Field weaken, is it worth it

Well the last two post's say it all for me atm , as relying on this qs motor for the extra kv i needed is a bit of a gamble. Add to that a more specific controller than your average foc is two much of a gamble for now, if i had close to kv needed id go for it, Heading in another direction now. Thank...
by Emoto
Jan 08 2019 9:32am
Forum: Stand-up E-scooters and E-skateboards
Topic: Scootabot
Replies: 28
Views: 2392

Re: Scootabot

So here is a thing im contemplating atm i love the simplicity of a hub / silence / freewheeling ability, and ive found a big one 9/10kg has a 8 x 8'' rim. the magnet width is 60mm not that big but still trying to get specs on stator diameter. im hoping that weight is windings ect. This could have gr...
by Emoto
Jan 06 2019 3:56am
Forum: Motor Technology
Topic: SPM VS IPM Motor - And Field weaken, is it worth it
Replies: 83
Views: 1963

Re: SPM VS IPM Motor - And Field weaken, is it worth it

[quote= If the rotor iron is well designed for leveraging reluctance torque, this will have a ~neutral efficiency impact to use the additional torque. Coming up with that amount you want to deviate from in phase requires a lookup table from characterizing the rotors iron characteristics. Also, take...
by Emoto
Jan 03 2019 8:04am
Forum: Stand-up E-scooters and E-skateboards
Topic: Biggest Power SU Scooter hub motor in 6'' rim
Replies: 1
Views: 111

Biggest Power SU Scooter hub motor in 6'' rim

This is for standup Scooter hub motor in 6'' rim , these are the biggest KW Motors i could find , but mabee you know better please share. The dualtron motor isnt in a 6'' rim afaik but the most powerfull afaik and i saw a Russian utube vid that measured magnet width at 70mm :) im guessing the first ...
by Emoto
Jan 02 2019 8:30am
Forum: Stand-up E-scooters and E-skateboards
Topic: 5200W stand-up scooter with air suspension
Replies: 83
Views: 4104

Re: 5200W stand-up scooter with air suspension

Happy new year! Thank, u 2 =) I want to try setting 120A battery\200A phase. Want to try to accelerate to 60kmh in 4 seconds. As it happens, I will share my impressions and it will be clear whether it is necessary to kicked up rear section to deck =) That 0-50 is already good for that 60mm motor. B...
by Emoto
Jan 01 2019 8:26am
Forum: Motor Technology
Topic: SPM VS IPM Motor - And Field weaken, is it worth it
Replies: 83
Views: 1963

Re: SPM VS IPM Motor - And Field weaken, is it worth it

The flux path i was discussing there was the one from the V grove rotor not the qs3000w u posted up front. For the qs3000w u are right there is not much reluctance torque possible, it will only come by the magnets saturating the stator iron (5-10% max). The pictured rotor with the V-groove magnets ...
by Emoto
Dec 31 2018 1:15pm
Forum: Stand-up E-scooters and E-skateboards
Topic: 5200W stand-up scooter with air suspension
Replies: 83
Views: 4104

Re: Stand-up scooter "VOSTOK 1"

[quote=alex_2d In the last video max batt - 55A (4160 watts), phase amps - 110. In this mode, the motor is heated to 110 degrees for 15 minutes. Continuous load without overheating - 30A batt (2200w) [/quote] :bolt: Happy new year! :bolt: Is this still the max performance, im still deciding on motor...
by Emoto
Dec 30 2018 9:16am
Forum: Motor Technology
Topic: SPM VS IPM Motor - And Field weaken, is it worth it
Replies: 83
Views: 1963

Re: SPM VS IPM Motor - And Field weaken, is it worth it

Or with other words if the controller you are using is rated for 72V and you already run a 72V battery, you will not have much room for a gain in RPM. Not so if you would run same 72V controler with only 36V battery voltage, where you could gain twice the RPM safely. Thanks for the abbreviation Mad...
by Emoto
Dec 30 2018 8:16am
Forum: Motor Technology
Topic: SPM VS IPM Motor - And Field weaken, is it worth it
Replies: 83
Views: 1963

Re: SPM VS IPM Motor - And Field weaken, is it worth it

Ah ok there is a missunderstanding. What we were talking about getting efficiency in terms of using all available Torque. Liveforphsics is refering an operating point past the torque optimum and there the ipm torque is decreasing faster with with increasing FW. I Think he is generalizing , as i am,...
by Emoto
Dec 29 2018 5:29am
Forum: Motor Technology
Topic: SPM VS IPM Motor - And Field weaken, is it worth it
Replies: 83
Views: 1963

Re: SPM VS IPM Motor - And Field weaken, is it worth it

Hi Emoto, About the 2-6% gain in eff.: on what basis was this increase calculated? Automotive IPMs normally provide more then 30% of their torque from reluctance. U can even build a motor the just uses reluctance part of the torque and get rid of the magnets and i dont mean those stepper like reluc...
by Emoto
Dec 28 2018 3:24am
Forum: Items for Sale - Used
Topic: Revolectrix Cellpro PowerLab 8 v2 1344W Charger
Replies: 6
Views: 550

Re: Revolectrix Cellpro PowerLab 8 v2 1344W Charger

No Response from interested partie's so this is still for sale, i think :pancake: , so If Your interested in this charger dont hesitate to pm.
by Emoto
Dec 27 2018 8:47am
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 161
Views: 10253

Re: QS 3000w midmotor

Qs specs quote the 2000w motor at just under 8kg.. if any one has one and could weigh it id appreciate it.
by Emoto
Dec 27 2018 8:43am
Forum: Motor Technology
Topic: SPM VS IPM Motor - And Field weaken, is it worth it
Replies: 83
Views: 1963

Re: SPM VS IPM Motor - And Field weaken, is it worth it

tecnologic more home work :) Its funny that a from small question to myself Should i get one of these low 41kv ipm's spawns a lot of research Here is a vid for those interested, bZwLFpXhFbI in the link'' texas instruments'' video they talk about pinching the flux affect , and thats why i assumed it ...
by Emoto
Dec 26 2018 10:16am
Forum: Motor Technology
Topic: SPM VS IPM Motor - And Field weaken, is it worth it
Replies: 83
Views: 1963

Re: SPM VS IPM Motor - And Field weaken, is it worth it

Hi tecnologic !! So If if i understand , if you dont utilize id / reluctance torque in an ipm that will sort of fight against iq / magnetic torque. making it less efficient. So if we compare it with the 68kv spm at the same speed [kph ] the 41kv ipm would be past its not fluxed state @ 3000 rpm[4500...
by Emoto
Dec 24 2018 10:08am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 365
Views: 27170

Re: Nucular electronics - complete kit for ev! [beta]

VasiliSk wrote:
Dec 23 2018 5:36am
this thread not about motors...
Iv Started a new thread discussing motor comparisons .
Feel free to ad your findings with ipm's .
Edit spm vs ipm https://endless-sphere.com/forums/viewt ... 30&t=97880
by Emoto
Dec 24 2018 10:03am
Forum: Motor Technology
Topic: SPM VS IPM Motor - And Field weaken, is it worth it
Replies: 83
Views: 1963

SPM VS IPM Motor - And Field weaken, is it worth it

So This a follow on discussion as seen here https://endless-sphere.com/forums/viewtopic.php?f=31&t=75494&start=275 im personally interested as im considering 2 inrunner motors one spm kv of 68 and a qs ipm kv 41 ,my main question is is fw worth the hassle . As LFP has quoted ipm's with large stator ...
by Emoto
Dec 24 2018 8:54am
Forum: Items for Sale - Used
Topic: Revolectrix Cellpro PowerLab 8 v2 1344W Charger
Replies: 6
Views: 550

Re: Revolectrix Cellpro PowerLab 8 v2 1344W Charger

For some reason i havent received it , my inbox was in red so i deleted old pms but icon is still red.... give it another go
by Emoto
Dec 23 2018 8:22am
Forum: Items for Sale - Used
Topic: Revolectrix Cellpro PowerLab 8 v2 1344W Charger
Replies: 6
Views: 550

Re: Revolectrix Cellpro PowerLab 8 v2 1344W Charger

Price drop to 225. Happy Christmas :D
by Emoto
Dec 15 2018 4:48am
Forum: Stand-up E-scooters and E-skateboards
Topic: 5200W stand-up scooter with air suspension
Replies: 83
Views: 4104

Re: Stand-up scooter "VOSTOK 1"

Thanks for the effort and detail on this build ... your a crazy man with that mill :D= This is ART!! , If i missed it What is the magnet width/ hight. 70mm im guessing. And please keep stating your max batt/phase amps + temps = very interesting, id love to find a 100mm magnet / stator motor that can...
by Emoto
Dec 12 2018 10:58am
Forum: Stand-up E-scooters and E-skateboards
Topic: 5200W stand-up scooter with air suspension
Replies: 83
Views: 4104

Re: Stand-up scooter "VOSTOK 1"

EPIC !!! , i still havent decided on my motor yet. as its a reduction build , i can see why you chose that motor.
by Emoto
Dec 12 2018 5:11am
Forum: Stand-up E-scooters and E-skateboards
Topic: Scootabot
Replies: 28
Views: 2392

Re: Scootabot

Here is a piece i can knock off the list - rear drive hub redrilled/tapped to m6 from m5 , i saw a online calc that stated 6xm5 in a 44mm bcd ,around 240nm so going to m6 gives me some piece of mind... On too the Next piece of the puzzle.
by Emoto
Dec 06 2018 9:38am
Forum: Stand-up E-scooters and E-skateboards
Topic: Scootabot
Replies: 28
Views: 2392

Re: Scootabot

Good news -- bad news and lesson learned the good is fork mount hole is drilled the bad is its got 8/10mm of run-out at axel :roll: So ill take it back, and suggest a brass / stainless insert and re-drill STRAIGHT. Old lessen learned. when i ask how are you going to get it straight dont except ..arr...
by Emoto
Dec 04 2018 10:15am
Forum: Stand-up E-scooters and E-skateboards
Topic: Scootabot
Replies: 28
Views: 2392

Re: Scootabot

Fork is a few post back,[ not 100% done yet] good to know about bearing wear... i thought bearings would get a pounding so i had some 37x12xs, using those and if they dont last i made sure i can get some tapered - same size as replacements . Id be happy to see you do a build . Deep in thought Workin...
by Emoto
Dec 02 2018 4:56am
Forum: Stand-up E-scooters and E-skateboards
Topic: Scootabot
Replies: 28
Views: 2392

Re: Scootabot

Got the down-tube braces design i like , should give the extra strength + front rear /side support needed. And looks better than a simple plate , have sourced materials, this stage will be one of the most important especially coming up with a clamping method to guarantee that is straight for the wel...
by Emoto
Dec 01 2018 3:20am
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 161
Views: 10253

Re: QS 3000w midmotor

I got interested in this motor when Valilisk mentioned it in his controller thread.
Cant find it, Does anyone have a link to that ,Thanks