Ups.. i think i'll go for 0W-30 Maybe I should try 5W-40 first, i'm not sure it 0W-30 is "thick" enough to lubricate the gears well enough.neptronix wrote: other lubes can eat at some of the motor internals, i'm not sure which ones, but i would assume that anything petroleum derived would be something to avoid ( those seem to enjoy eating plastic from what i hear )
My plan is 74V 15amps with a sensorless 6-Fet infineon with 4110 Fets (fits under the saddle).. I hope i get no problems with senorless operation at that power... this way i can easily recycle the hall-wires as temp probe wires.Vladimir wrote:It is perfect for 48 V and about 20-25 A.
Do not push it too far and put some fresh oil inside before first use, about one big tea spon.
this is wrong. The helical angle is so small (have a look at the pictures above), the influence on efficiency is absolutely negligible. btw helical gears can take more load than straight cut gears of the same size.helical gears will not be as efficient as the straight spur ones
people who say that something can't work shall not disturb those who do it already
as you can read above we already discussed that.. question is, which specific ATF.. anyway thanks for the input, i'll try 0w-30. ATF is really not common here, 99% of the cars here are stick shift.Punx0r wrote:0-30 should be more than thick enough. Have you considered ATF? That's pretty thin and is used in manual and automatic car transmissions at much higher loadings.
That sounds almost exactly like what I would like to do with my build, I'll be following you and seeing how it goes! (hopefully well)crossbreak wrote:my plan is 74V 15amps with a sensorless 6-Fet infineon with 4110 Fets (fits under the saddle).. I hope i get no problems with senorless operation at that power... this way i can easily recycle the hall-wires as temp probe wires.
ATF is also used in power steering systems, so see if you can get some power steering fluid (although the oil your using will probably work fine anyway)crossbreak wrote:as you can read above we already discussed that.. question is, which specific ATF.. anyway thanks for the input, i'll try 0w-30. ATF is really not common here, 99% of the cars here are stick shift.
around 420rpm loaded @48V, so you'd need 90V xD I'll really measure KV tomorrow when i have my CA alternative connectedcircuit wrote:Excellent news so far. Waiting for further updates
BTW I'm interested how fast can it go... I mean I am interested in 50km/h with 12" wheel, which is around 800rpm. That gives what, 6400rpm on motor? Not too much probably?
Nope, not delta-wye.. Not all motors operate well under delta. Check the drawingneptronix wrote:Oh yeah.. delta wye changeover.
I think it's much better just to run high volts.
That's always been the way to hot rod DD motors anyway. Low speed wind, craptons of volts.
My magic pie in a 20" wheel was nuts on 125v, but only hit what.. 45mph or something ... lol.
That's pretty good, I'm keen to hear how it performs on bike!crossbreak wrote:no load current @76.5V: 0.91A
I was under the impression that the stator and planetary gear set where isolated from one another, it looks like this would be the case from this picture, and as neptronix saidcrossbreak wrote:there is no "gear side" you could fill with oil.
Can you confirm that's not the case, there is no sealing/isolation between sections?neptronix wrote:This motor does have a separate oil section for the gear system, so i'd assume that it is sealed off from the stator. But whether the stator side is very well sealed is up for experimentation.
Thanks that answers what I was asking. I wasn't totally sure how it all went together from just the pictures.crossbreak wrote:sealing?? it's just a bearing...
if oil gets through it, it will get on the windings
There are 8 magnetic sections here... even if it's a 7:1 reduction, consider that a 16 pole 5:1 MAC motor will spin up to 560rpm at the wheel, at least, on an EB3 infineon-like controller. That's a pretty insane eRPM..Lebowski wrote:pitty I don't have a second controller lying around (like I put on the recumbent, 100 to 120V, about 30 to 40A rms)
the 1000uH is really crazy, how much erpm does it do for 400rpm wheel speed ?