

is that continuous or peak power ? 13kg wow that's a boat anchor heavy...at "5000W"
Based on weight alone, I'd say Continuous.Alex07 wrote:is that continuous or peak power ? 13kg wow that's a boat anchor heavy...at "5000W"
With that KV rating, this would be an excellent 12S to 16S motor, bring on the amps!Stator Material: Unknown
# magnets/Pole Pairs: 32 magnets & 36 tooth stator design.
Magnet Height: 55mm
Standard Winding: 33x3T
Kv: 13.47 (970 RPM at 72V, 4A unloaded)
Rated Max. Torque: 110 Nm
Drop-out Width: 150mm, 220mm wide axle, overall. M16 X 1.5 Threading, with 10mm flats.
Weight: 13 Kilograms.
Single-Speed freewheel, M35x1 Threads.
Phase wires: 6mm2 (about 9 AWG)
Dual sets of hall sensors & KTY83/110 temperature sensors
Left side cover accepts disc brake rotors.
With a 33X3T winding, the total cross-sectional area of the motor's windings is 6.47mm2 so a 6mm2 phase wire size is slightly undersized. Put in other words, the phase wires will get hotter than the windings.litespeed wrote:What bothers me is the itty bitty phase wires. The 3000 watt QS 205 V3 has 10mm and this new 5000 watt 55mm MXUS has 6mm? Basically a 7 gauge wire for the QS and an 9 gauge for the MXUS. That seems to always be the downside of MXUS. Now I know that a wider stator will make more torque/power but at the end of the day under sized wires is just that, undersized. Specially or should I say specifically for this crowd here of over volting & over amping abusing what ever they can with too many electrons being stuffed in things they don't belong in! I do however love to see it and recommend it on a daily basis. Nothing better than a "watch this" moment.
When you look at the 4000 watt QS273 Ebike motor it has 16mm sq wires which is about 5 gauge.....good gawd!
I'm not saying this isn't awesome but it looks like inflated "horsepower" wars and consumer mass confusion.
Tom
In real world, the phase wires wouldn't even be hot to touch when the windings already turned into plasma. The phases wires normally will give off many times more heat compared to the coils.teslanv wrote: With a 33X3T winding, the total cross-sectional area of the motor's windings is 6.47mm2 so a 6mm2 phase wire size is slightly undersized. Put in other words, the phase wires will get hotter than the windings.
If I understand madin's comments, it's that the phase wires are able to shed heat better than the windings, assumedly because they more open to outside air, and not contained inside the motor housing.Samd wrote:Madin i am interested in that. This has puzzled me before.
Why not match phase wire cross section to windings? Why would their resistance be higher?
Seems to be two schools of thought here.
7kw sine wave infineon at 22s i to my v2 mxus and the outside cables never get painful to touch (65c external)
I am wondering with the KV rating as high as it is if this motor would benefit from say a 25x4T winding? I am guessing that would bring the KV down to around the "10ish" rangeteslanv wrote:[img]http://
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MXUS sent me some info on a new motor they are going to be building, model number "XF5K"
It is a 55mm wide magnet design, which is 5mm wider than either the QS 205 or the Cromotor.
They rate it at "5000W"
Here are the specifications we know so far:
Stator Material: Unknown
# magnets/Pole Pairs: 32 magnets & 36 tooth stator design.
Magnet Height: 55mm
Standard Winding: 33x3T
Kv: 13.47 (970 RPM at 72V, 4A unloaded)
Rated Max. Torque: 110 Nm
Drop-out Width: 150mm, 220mm wide axle, overall. M16 X 1.5 Threading, with 10mm flats.
Weight: 13 Kilograms.
Single-Speed freewheel, M35x1 Threads.
Phase wires: 6mm2 (about 9 AWG)
Dual sets of hall sensors & KTY83/110 temperature sensors
Left side cover accepts disc brake rotors.
Stay tuned. More information to come!
I don't see why not. A 25X4T winding would likely get the Kv down to around 10, if my math is good.Rix wrote:
I am wondering with the KV rating as high as it is if this motor would benefit from say a 25x4T winding? I am guessing that would bring the KV down to around the "10ish" range.
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?teslanv wrote:I don't see why not. A 25X4T winding would likely get the Kv down to around 10, if my math is good.Rix wrote:
I am wondering with the KV rating as high as it is if this motor would benefit from say a 25x4T winding? I am guessing that would bring the KV down to around the "10ish" range.
Here are my mathematical estimates of Winding to Kv for all windings of the 5K motor design:
33X3T = 13.47 Kv, Max continuous Phase current of 198A
25X4T = 10.07 Kv, Max continuous Phase current of 150A
20X5T = 8.05 Kv, Max continuous Phase current of 120A
16X6T = 6.71 Kv, Max continuous Phase current of 96A
And here is my Spreadsheet / Calculations if anyone is curious.