New Mosso dual drive bicycle?
- Thread starter shemozzle999
- Start date
the casing in the triangle looks suspiciously like d8veh's.
I asked Xofo about it last year, apparently it uses 3 controllers, two for the motors and one called the 'BOS'. I think that dual drive is inherently unstable, one motor pushes harder than the other without traction control is not good.
I asked Xofo about it last year, apparently it uses 3 controllers, two for the motors and one called the 'BOS'. I think that dual drive is inherently unstable, one motor pushes harder than the other without traction control is not good.
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Deleted member 4366
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Come on Shemozzle. Pay attention. I posted that one last May.
Assuming that it works like mine with one throttle and two controllers, the two wheels will always turn at the same speed because the controllers use speed-control. The traction on mine is like nothing you can imagine even on this very slippery snow. The underpass is 14% gradient. The front wheel was skipping nearly all the way up, but there was no problem with stability. Click on the picture.
Assuming that it works like mine with one throttle and two controllers, the two wheels will always turn at the same speed because the controllers use speed-control. The traction on mine is like nothing you can imagine even on this very slippery snow. The underpass is 14% gradient. The front wheel was skipping nearly all the way up, but there was no problem with stability. Click on the picture.
Yes synchronization will be the key problem to overcome.
New product development conference is hold on 12 of September to lauhch. The engineers and some ebike producers have attended the meeting. Our new product DMS (Dual Motor System ) has earned lots of attentions. DMS is with 2 motors and controller and one special speed controller BOS, which can run at the speed more than 80km/h. The exporter Klaus Hints from Germany has given some very constructive suggestion and showed a very positive outlook to this new product.
They also appear to have a crank drive on the way:
http://www.szxfmotor.com/display.asp?id=776
1. Stylish, light and install easily.
2. Multi-speed change with speed changer in rear wheel.
3. Built-in torque sensor
New product development conference is hold on 12 of September to lauhch. The engineers and some ebike producers have attended the meeting. Our new product DMS (Dual Motor System ) has earned lots of attentions. DMS is with 2 motors and controller and one special speed controller BOS, which can run at the speed more than 80km/h. The exporter Klaus Hints from Germany has given some very constructive suggestion and showed a very positive outlook to this new product.
They also appear to have a crank drive on the way:
http://www.szxfmotor.com/display.asp?id=776
1. Stylish, light and install easily.
2. Multi-speed change with speed changer in rear wheel.
3. Built-in torque sensor
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Deleted member 4366
Guest
You don't need a specific controller. You use two normal controllers. If you make a double throttle, which just involves gluing in a second hall sensor, the second hall is a little further away from the magnet so you get get about 10% less power/speed from it. You can adjust the power/speed difference by moving the sensor a bit further away, but it's not necessary unless you want to go for twin 500w motors. Two 250w motors work perfectly with equal power. Rather than theorising about potential problems, you should try it. I've built three now: one low-speed for off-road, snow, etc; one high-speed for fast commuting; one high-power for fast hill-climbing, which crashed at Bristol because the back lost traction, the front spins happily on take off for 10 meters without any problems.
You could also get a power diffence by choosing different power motors and controllers. They don't have to be the same. If you want to try it, you could stick a nice light Q75 in your front wheel.
Saneagle has a Bafang SWX in his front wheel at 22 amps and a High-speed Q100 in the back at 15 amps. He uses two throttles, so his motors work totally independently. He uses just the front one for normal use, and then brings in the back one when he wants high speed (24mph) or extra power for climbing. His wife uses it too, and she likes it.
You could also get a power diffence by choosing different power motors and controllers. They don't have to be the same. If you want to try it, you could stick a nice light Q75 in your front wheel.
Saneagle has a Bafang SWX in his front wheel at 22 amps and a High-speed Q100 in the back at 15 amps. He uses two throttles, so his motors work totally independently. He uses just the front one for normal use, and then brings in the back one when he wants high speed (24mph) or extra power for climbing. His wife uses it too, and she likes it.
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the Alien Golden Motor Special has programmable controllers in both wheels so 60% & 40% is not a problem,but 100% on both is more fun 
While this thread is about what appears to now be a production Mosso have you considered putting the sensors side by side to give you a differential and a soft start. I know your main concern is with straight line power and hill climbing but with an equal speed setup wouldn't you encounter the rear trying to maintain a straight ahead action while turning.
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Deleted member 4366
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You only need a differential if the wheels are locked to the same drive. The two wheels on a 2WD bike work completely independently. All these theorise problems that people keep inventing simply don't exist. 2WD is brilliant as it is!