Crystalyte NSM motor for brompton/dahon

[Chopins]

Hey,

I might have missed something but I could not find any discussion on the Crystalyte NSM motor specially designed for small front axle dropouts (Brompton):
http://www.crystalyte.com/NSM series.htm

It seems pretty new because last I checked (this summer) Crystalyte was only doing the G series motor for Brompton.

Anyone here tried it?

I currently have a Tongxin nano in my Brompton. I like it but I need more speed... 15mph just isn't enough With some overvolting the Crystalyte motor could go much faster I guess.

Regards

C.

 

[patpatbut]

Have you checked the weight of this? It is whoopy 4kg+

Can you not overvolt the tongxin motor?

 

[Chopins]

4kg was the weight of the old G series, this new one weights about 2.5kg which is really not that far from the tongxin (2.3kg?).

Not sure about overvolting the Tongxin... from my understanding the motor is based on a roller friction system and overvolting it causes the rollers to slip. I'd be glad to hear if anyone has some feedback about overvolting the Nano!

 

[patpatbut]

Have u considered q100 with overvolt? This is my plan for my brompton later this year as my Bafang clone motor is still going strong so no need to upgrade that soon.

I have tried overvolting my clone and it copes very well. The max speed I got was 19pmh but I found it too fast for my liking

 

[Deleted member 4366]

You can't really overvolt a Tonxin unless you have a way to turn the current down. They're just not strong enough.

Something doesn't quite add up with that Crystalyte motor. The Spec says 30A. I just can't see that in a 2.6kg DD motor. In their test sheet, it shows currents up to 17A.

 

[cwah]

You can see motor test in ebikes.ca site (nsm motor):
http://www.ebikes.ca/tools/simulator.html

Basically, don't expect to feed more than 500W constant (or 30-35km/h) otherwise motor will melt.

It is less efficient than the Tongxin (74% vs 75%) and has 2 times less torque for the same power.

I can't see the value of this motor apart from being maintenance free