Kappstein 3 speed motor

[shemozzle999]

http://kappstein.de/en/standard-titel/kappstein-motors/ka3s/#c495

 

[trex]

It would be very interesting to see how they managed to squeeze a 3-speed gearbox and a clutch inside that motor's lid.

 

[anotherkiwi]

Same way they did the 2 gear BB probably. I saw this on the site but because it is a internal controller, big, heavy, shiny motor it didn't rock my boat. Their idea is that you couple it with their BB to get 6 gears. How many Amps are available from the controller is the big unknown.

 

[flecc]

Interesting, but no point in a UK/EU legal pedelec. Two motor gears easily cover the 5 to 15 mph riding speed range.
.

 

[shemozzle999]

https://www.flickr.com/photos/124842000@N08/25913186721/in/album-72157663964996404/

 

[mike killay]

Are they wanted?
I did have high hopes a few years ago for the two speed hub motor, but they appear to have faded away

 

[Deleted member 4366]

Are they wanted?
I did have high hopes a few years ago for the two speed hub motor, but they appear to have faded away

I'm still using my 2-speed Xiongda. It's done 3500 miles so far. It's the best motor that I've used, and beats a crank-drive hands down.

 

[shemozzle999]

Are they wanted?
I did have high hopes a few years ago for the two speed hub motor, but they appear to have faded away

Even more so now that it looks like the throttle ban seems here to stay and the ridiculous state of affairs of applying only pulsed motor assistance but not being able to have efficient constant smooth power.

I wonder if any tandem riders have set the two sets of pedals at 90 degrees to each other so that it smooths out the applied power.

 

[Deleted member 4366]

and the ridiculous state of affairs of applying only pulsed motor assistance but not being able to have efficient constant smooth power.

What's that about? Have I missed something?

 

[flecc]

What's that about? Have I missed something?

I think Shemozzle may be referring to the way a torque sensor sends variable strength pulses for the motor drive. The Panasonic units were designed in this bionic fashion for the motor to mimic the rider input. When their shunt is altered to greatly increase the power, the power pulsing becomes rather unpleasant in nature.

They don't have to be like that of course, some introduced lag solves the problem.
.

 

[trex]

I thought the torque sensor output is always used in conjuction with the cadence sensor.

 

[flecc]

I thought the torque sensor output is always used in conjuction with the cadence sensor.

In the Panasonic units prior to 2010 only to set a permitted power level above a cadence of 40. Within whatever the permitted level is, the torque sensor determined the pulsed power.

Since mid 2010 there's effectively no cadence limiting in these units for most e-bike riders.
.