Are these kits any good?

[jdbauman]

I was wondering if anyone has any experience with these kits. Are they any good?

http://cgi.ebay.com/1000W-48V-ELECT...yZ158998QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

 

[John in CR]

The thing I find very interesting is the wording in the FAQ's "Our axial flux motor is up to 98% efficient...". Is this really an axial flux motor, and does it really have an efficiency well above 90%?

John

 

[dogman dan]

Maybe if you use the optional continum transfunctioner. 8) Comeon, 98% effiecient? Is that a no load test ? Allways cut all EV vendor claims in half or more.

 

[John in CR]

Maybe if you use the optional continum transfunctioner. 8) Comeon, 98% effiecient? Is that a no load test ? Allways cut all EV vendor claims in half or more.

Dogman,

That wasn't my point at all, especially since elsewhere they only talk about efficiency >80%. The only motor I know of that meets their statement is the CSIRO extreme efficiency motor. What interests me is that the wording says this hub motor is built by the makers of the CSIRO, so maybe this hubbie is advanced and different from others.

John

 

[marvingalaxy]

Isn't that a GoldenMotor?

 

[Link]

Isn't that a GoldenMotor?

Looks an awful lot like it...

 

[dogman dan]

That similarity to golden is why I doubted it was anything all that special. But who knows what is inside? Maybe they just use the same case covers on something great inside. But I doubt it. There are a bunch of motors out there besides golden that come from the same factory is the rumor. Not that anybody shouldn't buy one, I'm sure they are as good a motor as 90% of em out there. Any warranty service on one will be fun, all the way from china though. Buying two might be real wise! But I stand by the statement, cut all claims in half. I can think of only one vendor who doesn't make a bunch of exaggerated claims for range or speed. You know who, ebikesca.

Looking again at the auction, they say in one place 80% efficient, that may be beliveable. In the FAQ they say up to 98% for the axial flux motor, but I don't see a claim that the motor being sold is axial flux, whatever that is. Anyway, I'm sure the thing will push a bike, and the price is ok, but not really better than the ones selling from Kraft in the selling threads, and he is in the usa if you need a replacement charger. At best, the claims and specs on this ad are confusing.

 

[John in CR]

I asked and got the reply that yes it's an axial flux motor, and they also attached test results of both motors. Both were unimpressive with maximum efficiency at only 84%, though the 1000W motor did have quite a wide range of current input with efficiency of 80% or better at 48V. I specifically asked if they were the makers of the 98% eff CSIRO motor, and requested pics of the insides of the 2 cheap hubbies, so we'll see what they come back with.

It's my understanding that an axial flux motor doesn't have the same iron requirements as the common radial flux hub motors we run, so they are potentially a much lighter motor. That's what caught my attention about this motor, that maybe it's something different, and maybe worthy of investigation.

John

 

[John in CR]

Despite further assurance that it's an axial flux motor, here's a pic of the guts, which tells my guts cheap, Cheap, CHEAP!

 

[dogman dan]

Less iorn in the magnets? We allready knew it wouldn't look high dollar inside. Seems to me a lot of the motor weight is in the copper anyway, and not much can be done about that. That rotor looks like they tried to lighten up some though.