mr.electric
10 kW
Nice work! Heat sink looks awesome.
mr.electric said:My heat bridge is coming along. I pulled the axle out completely. It rides in a bearing pressed into the rotor. Does the shaft need to be locked to the rotor or planetary carrier. As it sits now it seem that the shaft would just spin freely disconnected from everything. The sun gear is part of the rotor on my BMC.
bØb said:yes, the shaft must be locked to the the planet carrier. In a MAC, and I would assume in a BMC, just put the key back in shaft for the clutch. The clutch will then be a freewheel for the shaft. The clutch will engage and turn the shaft. The shaft will turn in the opposite direction from the way the housing turned. You must mount the housing in the frame in the opposite direction from the way it was used as a hub. Your output shaft, what use to be the axle, will turn in the proper direction for chain or belt drives.
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Just remember: Lock the stator to the case and the planet carrier to the axle (new output shaft), turn the motor around in the bicycle frame.
ok... now you blame me :? was it really so confusing what I told all the time? Maybe you should have told me. I thought that most people here know how a planetary works, mabye I was wrong :? I just wanted to motivate other people to do the same as i did, cause I see some benefit, and wanna get the necessary feedback to get on further. Wanted to give back what I got from the sphere, the half bakery, just as half baked as I am. I spend almost spend $200 for this project (of course this was my fault), just to have a look if it might work. I really should have split both topics in the first place.I think I now understand what you are doing.
As you point out, If you could find a frame where the motor fits properly you don't need freewheeling cranks. The motor shaft free wheels in the motor because of the one way on the planetary carrier. You do not even need two free wheels to set up a mid drive. One sprocket and one freewheel would do it. Both chains could be on the same motor axle , cut off the extra axle or you could do jack shaft style it would work either way.StudEbiker said:Part of the idea of this system though spinningmagnets is to not use freewheel cranks. To do that, you will need to have a gear on both ends of the motor. Putting this on a recumbent like the Bike E like I would plan on doing eliminates the need to have the motor fit inside the cranks. There's LOTS of places to put it so that the cranks won't come anywhere near motor. 8)
mr.electric said:After years of threading wires through impossibly thin axle passages I made a huge hole in the cover plate to allow assembly / disassembly with absolutely no interference with the wires.