2000w rated hub motor

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PeeHell   100 W

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2000w rated hub motor

Post by PeeHell » Jan 03 2013 5:33pm

I've been recently seeking for an ebike hub motor that has a great quality/price ratio. The best I've found is this one :
http://www.poltm.com/en/product_detail. ... d=122&fid=

I decided to order it since the specs and price were looking great. I received the motor and let me tell you it looks very similar to the "large diameter cromotor" : http://endless-sphere.com/forums/viewto ... ge#p530502

Here are the specs from the manufacturer :
Stator diameter: 266mm
Stator width (magnets): 24mm
Kv: 9.3rpm/v
Net weight: 8.95kg
Rated power: 2000w
Phase wire gauge: 4mm² (~11awg)
Dropout: 145mm
Max claimed efficiency:84.8%

Taken from the document with test graph and data:
20130102_183624.jpg
20130102_183624.jpg (131.28 KiB) Viewed 4134 times
Disk brake screw holes:
20130103_162422.jpg
20130103_162422.jpg (111.52 KiB) Viewed 4134 times
Nice overall paint quality :
20130103_162444.jpg
20130103_162444.jpg (127.87 KiB) Viewed 4134 times
The only issue I've spotted so far : a "cone" instead of the freewheel adaptor...
20130103_162525.jpg
20130103_162525.jpg (119.34 KiB) Viewed 4134 times
A closer look :
20130103_162541.jpg
20130103_162541.jpg (171.74 KiB) Viewed 4134 times
Nice stock phase wire size ; less mod to do :
20130103_162642.jpg
20130103_162642.jpg (155.48 KiB) Viewed 4134 times
This motor looks promising thus far. I'd like to hear opinions about it from you guys as well as a possible solution for the freewheel issue. Any comment are welcomed.
Pierre-Luc
Last edited by PeeHell on Jan 18 2013 11:54am, edited 1 time in total.

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neptronix   100 GW

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Re: 2000w rated hub motor

Post by neptronix » Jan 03 2013 7:02pm

That does look just like the motor i like to call the "deep dish" cromotor. :mrgreen: dimensions being +/- 1mm.
Might even be that a magic pie side cover bolts right on to that weird tapered side.

Can you get us a pic of the interior?

Image

This is what the magic pie stator looks like.
"Love and compassion are necessities, not luxuries. Without them, humanity cannot survive." - Dalai Lama

My first major build: 1.6kW 8T MAC motor on a Trek 4500.
The new all-arounder: Leafmotor 1500w @ 4kW on a Turner O2 full suspension.
The monster scooter: 20" eZee on a Cannondale Semi Recumbent.
Whipper-snapper: ? on a lightweight BikeE Semi Recumbent

PeeHell   100 W

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Re: 2000w rated hub motor

Post by PeeHell » Jan 03 2013 10:18pm

That is my next move when I'll have time. Great idea to try the magic pie cover swap. I have a magic pie in the garage ; it's worth having a look at that procedure.

flathill   100 kW

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Re: 2000w rated hub motor

Post by flathill » Jan 04 2013 3:11am

$235 shipped from china is a hot deal
Was that by air by chance?
Great find man!
POLTM is working witch fcuking Bosch on magnesium hub motors
Yes the germans
The future is looking bright for wheel motors

Maybe the cone shaped side cover allows for a stronger side cover (1 piece maybe
Maybe some sort of taper lock
And the design may allow the freewheel to slip before you break it
I've broke two side covers in a week a few years ago stomping on the pedals in high gear

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Re: 2000w rated hub motor

Post by PeeHell » Jan 04 2013 5:10pm

The shipping was from DHL and I received within 5 days ! I'm still looking for a freewheel solution. Maybe I could glue a freewheel with 3M DP420 epoxy. Will see...

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docnjoj   100 GW

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Re: 2000w rated hub motor

Post by docnjoj » Jan 04 2013 5:18pm

Any chance that cone thing unscrews leaving standard freewheel threads?
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neptronix   100 GW

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Re: 2000w rated hub motor

Post by neptronix » Jan 04 2013 5:21pm

When you gonna open that badboy up? :mrgreen:

Is the dropout spacing 150mm, btw?
"Love and compassion are necessities, not luxuries. Without them, humanity cannot survive." - Dalai Lama

My first major build: 1.6kW 8T MAC motor on a Trek 4500.
The new all-arounder: Leafmotor 1500w @ 4kW on a Turner O2 full suspension.
The monster scooter: 20" eZee on a Cannondale Semi Recumbent.
Whipper-snapper: ? on a lightweight BikeE Semi Recumbent

flathill   100 kW

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Re: 2000w rated hub motor

Post by flathill » Jan 04 2013 7:23pm

What motor did you order? On the polaris website when I click through to and see the motor it shows 266 series, but when I search 266 series polaris on google I get a different motor:
http://www.poltm.com/en/product_detail. ... id=22&fid=

Did they have no problem with you buying just one?

It would be a shame if this was made for a moped and you can't easily mount a freewheel. Have you tried contacting polaris?

Thanks!

Does anyone have a link to the chinese language version of the polaris webpage?

Anyone speak Russian? The Russian ebike forums seems to have many users of polaris hub motors...

I love how they list all the specs for the most part
going so far as to list the steel hardness
1、Casing : 20 # steel
2、Magnet material: NdFeB
3、Enameled wire: QZ-2/130
4、Iron core: DW600
5、Shaft:40Cr/Q.T.: HRC22-28 Side outlet
6、Cable:3*1.5mm²+5*0.2mm²/Max.Tmp.:180˚C

It looks like the windings are only rated to 130C :(
while the phase wires are rated to 180C

How thick are DW600 laminations?

PeeHell   100 W

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Re: 2000w rated hub motor

Post by PeeHell » Jan 05 2013 3:44am

I copied the link in my first post.
I'll probably open it next weekend.
I've seen the other 266 motor before and I went with the all-black cover one because of the superior weight (probably because of a thicker stator).
I cannot unscrew the "cone" thing ; it's embedded in the side cover.

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Chalo   100 GW

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Re: 2000w rated hub motor

Post by Chalo » Jan 05 2013 4:09am

How do you expect to tighten the disc side axle nut without destroying the dropout, the axle face, or both?

Staton Inc. made a similar design mistake with their in-house RH/LH threaded hub.
This is to express my gratitude to Justin of Grin Technologies for his extraordinary measures to save this forum for the benefit of all.

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dogman dan   100 GW

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Re: 2000w rated hub motor

Post by dogman dan » Jan 05 2013 7:59am

Good eyes Chalo. I didn't notice that. Not much axle shoulder there. I can't tell from the pic if there is a shoulder further in, allowing the use of a spacer.

No big deal though, if you would, and you should be, using a pinch dropout torque plate on that side. Assuming of course that you'd be running this thing at at least 2x the rated 2000w. 8)

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neptronix   100 GW

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Re: 2000w rated hub motor

Post by neptronix » Jan 05 2013 9:24am

Chalo wrote:How do you expect to tighten the disc side axle nut without destroying the dropout, the axle face, or both?

Staton Inc. made a similar design mistake with their in-house RH/LH threaded hub.
Solution: 100% tight fit custom washer :cry:

I didn't notice that..
"Love and compassion are necessities, not luxuries. Without them, humanity cannot survive." - Dalai Lama

My first major build: 1.6kW 8T MAC motor on a Trek 4500.
The new all-arounder: Leafmotor 1500w @ 4kW on a Turner O2 full suspension.
The monster scooter: 20" eZee on a Cannondale Semi Recumbent.
Whipper-snapper: ? on a lightweight BikeE Semi Recumbent

knighty   10 kW

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Re: 2000w rated hub motor

Post by knighty » Jan 05 2013 5:44pm

your spec above says 2kw... but the page you link to says 1kw ?

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Re: 2000w rated hub motor

Post by PeeHell » Jan 05 2013 10:26pm

The test data sheet I received indicates 2000w rated power. Chinese vendors often don't write the same information correctly...

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neptronix   100 GW

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Re: 2000w rated hub motor

Post by neptronix » Jan 05 2013 10:34pm

Continuous wattage will vary with the voltage they are thinking of at any given time in the spec sheet :lol:

I can see how this motor would do 2000w continuous all day long in a smaller wheel like a 24" or 20". My magic pie could do about 1250W-1500W continuous all day in a 20" wheel, and that was with a narrower stator that had far more end turn loss and less efficiency than this as a result.

The stator on this baby is about 20-25% wider than on the magic pie, and the spec sheet indicates peak efficiency is maybe 3-4% higher, so 2000W continuous doesn't seem like a stretch. Lace this thing up to a 24" ( 20" might be difficult/impossible :lol: ) and let it rip!
"Love and compassion are necessities, not luxuries. Without them, humanity cannot survive." - Dalai Lama

My first major build: 1.6kW 8T MAC motor on a Trek 4500.
The new all-arounder: Leafmotor 1500w @ 4kW on a Turner O2 full suspension.
The monster scooter: 20" eZee on a Cannondale Semi Recumbent.
Whipper-snapper: ? on a lightweight BikeE Semi Recumbent

PeeHell   100 W

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Re: 2000w rated hub motor

Post by PeeHell » Jan 05 2013 11:04pm

24" wheel running at 24s lipo is the plan, maybe 20s will see. I'll go slowly with this project

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neptronix   100 GW

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Re: 2000w rated hub motor

Post by neptronix » Jan 29 2013 4:43pm

Shameless thread bump..
Have you gotten anywhere with this?
"Love and compassion are necessities, not luxuries. Without them, humanity cannot survive." - Dalai Lama

My first major build: 1.6kW 8T MAC motor on a Trek 4500.
The new all-arounder: Leafmotor 1500w @ 4kW on a Turner O2 full suspension.
The monster scooter: 20" eZee on a Cannondale Semi Recumbent.
Whipper-snapper: ? on a lightweight BikeE Semi Recumbent

PeeHell   100 W

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Re: 2000w rated hub motor

Post by PeeHell » Jan 29 2013 5:04pm

Haven't had time yet. Just starting to figure out how to install at least a one gear freewheel on this motor. Not that easy...

briangv99   100 W

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Re: 2000w rated hub motor

Post by briangv99 » Feb 04 2013 6:24am

Does the cone appear to be solid, or is it just a thin wall casting? Might be some option to machine down the cone and cut a thread, or press on a threaded insert

PeeHell   100 W

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Re: 2000w rated hub motor

Post by PeeHell » Feb 04 2013 11:03am

I think this is exactly what the greyborg team has done. I will probably go this way. Really looking forward to see this thing in action ; I think it will match the performance of the new expensive Crystalyte "The Crown".

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MadRhino   100 GW

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Re: 2000w rated hub motor

Post by MadRhino » Feb 05 2013 11:00am

Interesting motor.
I hope to see you riding it in the Mount Royal next summer :D
What frame are you building on ?

I doubt that it will be close to the new Clyte in performance, for it looks like it has less than half the copper.
Make it fool-proof, and I will make a better fool.
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gensem   100 kW

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Re: 2000w rated hub motor

Post by gensem » Feb 05 2013 11:53am

Ultimate solution would be a motor that wide but with 50mm magnets and deep slots filled with copper. :)
Justin we really appreciate what you did!

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MadRhino   100 GW

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Re: 2000w rated hub motor

Post by MadRhino » Feb 05 2013 11:56am

gensem wrote:Ultimate solution would be a motor that wide but with 50mm magnets and deep slots filled with copper. :)
:twisted:
Make it fool-proof, and I will make a better fool.
Current bikes
Street:
Trek Session 10 mod. Variable geometry. 70mph
Dirt:
Santa Cruz V10. 50mph

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neptronix   100 GW

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Re: 2000w rated hub motor

Post by neptronix » Feb 05 2013 1:06pm

Ah yes but you have no idea how powerful a tallboy can be. My magic pie was insane. And it could shed an incredible amount of heat thanks to it's tallness. This is more efficient and has ~20-25% more magnet than my magic pie.

I can't wait until you show us the guts and/or actually get it running.
"Love and compassion are necessities, not luxuries. Without them, humanity cannot survive." - Dalai Lama

My first major build: 1.6kW 8T MAC motor on a Trek 4500.
The new all-arounder: Leafmotor 1500w @ 4kW on a Turner O2 full suspension.
The monster scooter: 20" eZee on a Cannondale Semi Recumbent.
Whipper-snapper: ? on a lightweight BikeE Semi Recumbent

PeeHell   100 W

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Re: 2000w rated hub motor

Post by PeeHell » Feb 05 2013 1:10pm

I was going to reply the same as neptronix. I currently own a magic pie too and I think that a large diameter is the way to go. It's like "bonus torque" because simple physics principles gives you the extra torque.
I don't think this will outperform "The Crown", but for 1/3 of the price, it'll be the best price/performance motor for sure.
I'm currently planning to mount this motor on my Tidal Force S750, but I'm having a hard time fitting 24x 4s 5000mah hardcase on the frame....

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