Specs of the Luna Cycle 750 geared hub motor/controller

[puregsr]

Does anybody know the specs on this Luna Cycle 750W geared hub and the controller?
https://lunacycle.com/geared-hub-ebike-kit-750w-for-front-or-rear/

I want to build a 20 inch electric folding bike to run 52V and am wondering if this will be a good choice especially for a 20 inch wheel. I just really like the simplicity of the controller/connectors, otherwise, I probably would have opted for a MAC.

I emailed Luna and asked about the current for the controller, but I didn't get a straight satisfying answer.

 

[amberwolf]

That's not surprising; if they don't post the info on the product page they probably have no idea what it is capable of (or they'd've put it up there).

The specs as listed on the page:

Available in front and rear wheel configurations
Brushless internally geared hub motor
Geared hub motor gives the ultimate in power to weight and efficiency
Small size = super stealthy
1000 maximum watts with a 52 volt battery
Compatible with any of our 48 or 52 volt batteries (or 36 volt battery)
Waterproof connectors that are easy to install.
Small stealthy controller
Complete kit with dash and accessories
Easy kit to mount
Front hub for 100mm dropouts, rear hub for 135mm dropouts
Disc brake compatible
Weighs less than 10 pounds

indicate that at 52v, it's max wattage is 1000, so if you divide the 1000w by 52v to get current, it's 19.23A.

I don't know what it's continuous current would be, though I expect around half of that based on labels I've seen on various controllers (when they bother to list both peak and continouous currents).


That's as precise an answer as is possible without actual testing of the system.

 

[puregsr]

Seems to be one motor for all wheel sizes. Without knowing the RPM, I can only assume that it'll be pretty slow for a 20 inch wheel.

 

[amberwolf]

Assuming it's too slow in the smaller wheel, then if you use a controller capable of higher voltages, and assuming the eRPM is not too high at those voltages, then the higher voltage would compensate for the smaller diameter.

 

[Jeffreynmandy]

Trying not to hijack the thread, but my question is related to the topic. what would be a good motor for a 20" wheel?

I want a good balance between speed and torque but I don't know the best turn to go with on a small 20"

I'm thinking either a leaf or edge motor. 1500 watts in either 4 or 5 turn.

 

[puregsr]

Are you doing a folding frame, cuz I would be afraid to run that much wattage.

 

[puregsr]

Personally, I want light weight, clean installation, decent torque for hills (likely wouldn't be a problem for 20" wheel), and 25mph.

 

[Jeffreynmandy]

Are you doing a folding frame, cuz I would be afraid to run that much wattage.

I have a old a2b metro I'm rebuilding. I'd love to do a folding bike since my main use is campgrounds. But since I got the frame for free I'm going to work with it.

 

[Tonk]

If you're talking about the dual gear hub I actually bought that for an HPV Scorpion FS 20. I chose the option for the already laced into rim they offered. Took 3 weeks to get it but it was a sight to see. Thing of beauty and perfect for a 20" due to it's small size which hid it behind the gear cluster. Unfortunately, being new to even them, they mistakenly thought it would fit a 135mm drop-out as long as a disk brake wasn't installed. NOPE. Needs a minimum of 145mm so keep that in mind. If you have a steel frame you can bend it to fit but aluminum not so much & even if you can spread the aluminum frame without damaging it, a flat would ruin your day due to the tension in the drop-out.

 

[docw009]

Don't know the gearing on the Lunacycles Mossa 20" folder with BBS02, but they claim 28 mph on 52V.

My 20" folder will do 25mph on 52V with the little Q100H motor. I don't know how long it would last, but I calculate a pedal cadence of 90 rpm with my 52/11 gearing, even though the motor is doing all the work.

The BBS02 would also have to turn 90 rpm on my folder to get 25 mph. Mine turns about 110 rpm at 28 mph on my 26" BBS02 conversion, so it could do it.

 

[puregsr]

It's not the 2-speed motor, just the good old fashion geared hub motor.

 

[puregsr]

Does anybody know if the MAC motor kit can be ordered entirely with higo connectors?

 

[docw009]

It's not the 2-speed motor, just the good old fashion geared hub motor.

Woah. Half asleep when I posted about the BBS02 and you meant the geared hub motor. Sorry.

My Q100H is a 260 rpm. Wheelspeed for a 20" at 25 mph is around 305 rpm. I suppose the 260 rpm is the most efficient speed of the motor, but it will spin past 29 mph no load speed with the right controller.

Wonder if a Q128H could do this and not burn up,