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Thread: Hub motor repair

              
   
   
  1. #11
    teddillard
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    OK, fixed the wires.

    Before:


    After:




    Now to decide if I want to test the Hall sensors or just slap it together again and see if it works. But how would I grow up to be like Rob, if I don't try to tamper with the elemental forces of the Universe?

  2. #12
    teddillard
    Guest
    Update. Tried to test the Hall sensors, there's no change on any of them using method 1. For method 2, (the 'current output' method suggested by the "no change" result) I don't have the required resistors, and my VOM is acting wonky, so I put it back together and tried it out. Deadness.

    Before I first took it apart, I tried it one last time to do a little video for the how-to. It ran once, but when I tried it a second time it didn't move. I'm wondering at this point if the controller fried when the wires shorted out. I had no idea they were actually bare at the time. Crap.

    I'm guessing the advice would be to get the resistors, test the sensors properly, then if they test out replace the controller...

  3. #13
    Senior Member DRZ400's Avatar
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    How's the controller? If you're going to replace it there's plenty available now that are sensorless. I used a sensorless 48v unit on my ebike. From Ebay, it was a 48v 30a unit thats worked flawlessly....$25.00! You just put it in learn mode and spin the hub...it then knows which phase to fire.
    2003 Ninja 250EX, Agni #95R, 6:1 Gearing, 11 Leaf Modules.
    Alltrax SPM72400, 400 amp Controller, all LED lighting
    2014 CRF450X Supermoto
    http://www.evalbum.com/1955
    http://www.evalbum.com/3337

  4. #14
    teddillard
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    Seriously? Do you have a link or model?

    ...wait, this doesn't involve aluminum foil, does it?
    Last edited by teddillard; 17 October 2010 at 1752.

  5. #15
    Senior Member larryrose11's Avatar
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    Ted, an inverter converts DC, like your battery, to AC. This power converter is necessary to drive an AC or a brushless motor.

  6. #16
    teddillard
    Guest
    oHHHH, THAT kind of inverter!

  7. #17
    teddillard
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    So, I decided to replace the Hall sensors since I was getting some wonky results of the tests, and don't feel like buying a new VOM in spite of the fact that I've been very very good and deserve it. At least that's my story. The sensors are marked with S41 814. Or maybe 641 814, but I think it's an S. I can't find a reference to it anywhere, can anyone point me to a replacement? And stop laughing at me Rob.

  8. #18
    Not to be taken seriously DaveAK's Avatar
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    I'm no expert but maybe one of these would do:

    http://www.mouser.com/Search/Refine....+effect+sensor

    (Just searched on S41 instead of the whole thing).

    Here's a Google search on the same thing:

    http://www.google.com/custom?hl=en&s...or&btnG=Search
    Last edited by DaveAK; 23 October 2010 at 0958.

  9. #19
    teddillard
    Guest
    Thanks, Dave!
    Update- Mr. Wizard (David O'Brien, Master of Space and Time) came over last night with a working VOM, (and more than a clue of how to use it... unlike me. ) and we ran through the tests that Rob suggested and a few that David wanted to do, and we got no response on any of the sensors whatsoever. What concerns him is that all three look like they failed at once- kind of bizarre, from his opinion. We've narrowed the part down to the Honeywell SS41 sensor at around $5 each so I'm ordering them from Digikey... will update.

    In the process of all this (mostly while he was poking and waggling, and I was daydreaming) I came up with the BRILLIANTLY crackpot idea to mount two motors like this on the same axle- making one double-wide hub motor. I know, I know... this scares me as much as I'm sure it does you... Tony, you in?

  10. #20
    Senior Member DRZ400's Avatar
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    Here is the controller I bought....hall sensor or sensorless works great. Brake, cruise control, rpm out. Several guys on ES use them. Some have swapped out the 12 drive fets to IRF units (low (RDSon) to boost the output.

    http://cgi.ebay.com/ebaymotors/500W-...item1c0cb61e25
    2003 Ninja 250EX, Agni #95R, 6:1 Gearing, 11 Leaf Modules.
    Alltrax SPM72400, 400 amp Controller, all LED lighting
    2014 CRF450X Supermoto
    http://www.evalbum.com/1955
    http://www.evalbum.com/3337

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