Most motor stator windings come in lower voltage configurations.If your ammount od copper is equal with less turns and your wire size you are using is gaged right all will be equal in efficiency.providing the motor is not exceeding its rated specs.Any 3 phase hub motor rated for 36 or 48 volts would work fine. or better than it would with any other controller you can find.The limiting factor would be THE MOTOR but you can program these limits into the controller.Isn't it time to have RELIBILITY that no one has seen yet in a brushless ebike controller? Lets see how long the new $900. Bionix controllers last?fechter said:
Motor ONLY is not for Ebikes either. If 20 lb hub motors and $500. hub transmissions are for ebikes this single speed motor for $350. with a programable controler should fit right in at being 89% efficient up to 5000 watts for efficient reserve power. With single chain reduction 100 ft lbs of torque can be cranked up at ANYTIME! more efficiently without any worry of breaking.To make It a hub motor just put a brake drum wheel on it's shaft.roller said:
If my $80. Kmart bike could handle ALL kinds abuse for 4 years and 20,000 miles without breaking Im sure a double frame with less battery weight would be even better! I had 100 lbs of Evercels on the same bike for two years until I replaced them with 14 lbs of lithium.CGameProgrammer said:
Scott at Rip current cyclery has one and is a dealer for them here on maui. He allowed me to rent it for the weekend to see how it would do for me in Kula. It was a blast on flat ground or with a sllight incline, but these areas are few and far between around here.
I don't know all that much about bikes, and even less about electric bikes. I know the Schwin Bike that the system is on has 24 gears and I had it in the lowest possible gear and full power assist but I was still wiped after a short distance back to my house. There was only one bar left on the battery meter but I thought this shoudn't affect lithiums. Any recomendations on a bike or kit that can handle it out here?
Is your Kmart bike identical to your drawing? It's the central joint that I remain wary of; it looks like too much stress would be dealt to it. Consider this Trek FS bike:EbikeMaui said:
From watching the videos, the speed and power of the optibike seems good. I think I would want at least this much power though as another thing I noticed when testing the BionX is how vulnerable I felt on the roads here with blind turns, fast drivers and many places with no shoulder. Would be great to be able to accelerate quickly through these areas, but still be able to get some exercise using only power assist in safe or comfortable riding areas. Actually unless I was able to accelerate quickly through the dangerous sections, I probably would't ride. I really like the speed and handling of your bike. Thanks again for your input.
The thing is if you baught a $350. brushless Etek you can get better efficiency with a single speed and have a programable range to 5000 watts. The $450 you could save on a Divinci (if you can use it for the motor on a bike with two chains going to the reduction in common) The eteck Sevcon controller costs the same. All parts are available today off the shelf.TylerDurden said:The design seems pretty reasonable: dual suspension, motor and battery weight in the center, motor and pedal chains on-axis... what's not to like?
The addition of a nuvinci cvp to that kind of an ebike could be significant step towards a PIC-based automatic tranny. Motor selections could vary based on enduser intentions.
