rkosiorek said:
i love these 20 questions games. you know where someone poses a question about something, deliberatly holding back information so that the players are forced to ask questions to derive the answer. always seems to be more of a dare or challenge then a quest for answers.
Sorry about that. I have this motor in my hands and wonder what anyone would need to identify it. Well, shape, maybe some marks, probably a typenumber. So, I take some pictures. I am/was assuming that there aren't a lot manufactures and there is lot of rebranding. It might have been a motor that is known under another brand.
1. is it a rear axle motor? from the looks of the axle on the wire side the spacing from the cover to the clamp face looks a little wide for it to be a front.
in the interest of shortening the game up a bit, i'll assume that the answer is yes and that the freewheel /gear cluster would be attached to the cover that we have not been shown.
so the axle is not a solid axle with threads on both ends. with the drive side cover removed only a short stub axle with a bearing is shown. suggests that the axle is in 2 pieces. one end would clamp to one chainstay and the other end to the opposite chainstay. best reason i can think of for this is for a simple strain gauge for use in a pedelec system.
Very good point, I should have mentioned it. It is a single axle. Maybe for a wheelchair or golfcart.
looking at the internal picture a second circuit board is visible on the other side of the stator, under the other cover. i'll bet that all of the external wires connect to that other board.
2. have you removed the other cover yet?
No, I haven't. I need a... pully puller? Don't know the english name for it. But the cover fits tight around the bearing, I can't get it off with a simple screwdriver. I can take it with to me work on the bicycle, but considering the weight and shape I would rather not do that.
the connector only has 3 pins. that usually means 3 conductors.
3. are 2 of the wires thicker than the third one obviously being the power wires?
leaves the question of what the third wire is for. i would guess it is for either a remote on/off switch on the handlebar or a expanded scale voltmeter used as a fuel gauge.
The wires have the same diameter. At first I thought it would be ground, + and the third one controlling the speed. But after reading up here on the forum I am not so sure anymore. When I posted the question I was still thinking of some 3 phase motor. But I am not so sure anymore. Why would you need all the electronics inside?
4. with the axles clamped into a chainstay (you need both sides clamped for the strain gauge to work), when you hook up 24V to the heavier power wires (careful to identify (+) and (-) first) does the motor turn?
5. how about if you apply a bit of force to the drive side cover does the motor add some power?
6. is there any voltage on the 3rd wire? is it the same as the battery voltage or lower?
7. if the motor did not provide assist before and the third wire voltage is lower, ground the third wire and see if the motor will now provide assist?
I am not going to try that. As long as I don't have a clue what the electronics are for I am not going to put power on it.
how far along in the game are we now?
is it a 24V rear pedelec assist motor? the kind where the motor amplifies your pedal input power?
I really don't know.
rick
with the limited information presented i almost feel like one of those psychics reportedly used by the CIA for "REMOTE VIEWING" (google it). i wonder how psychic i was about what was on the unseen cover? should the CIA hire me? another Stargate project?

Sorry, I don't think you're hired!
There is so much info here, I am overwhelmed. I did a lot of reading, tried to pick out interesting topics, but when you start with this without prior knowledge it is hard to filter out the info you need. How to find something if you don't know what you are looking for?
Dirk