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Thread: Hub motor repair

              
   
   
  1. #1
    teddillard
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    Hub motor repair

    I just started tearing down the hub motor on the X-Treme scooter I salvaged, here's the first phase of the repair. I say repair with hope, and pure thoughts. Unicorns too, I have unicorns.

    I'm lazy right now, so here are a few teaser photos. There are more on the post, and I might update this post with more as they come.

    http://evmc2.wordpress.com/2010/10/1...e-a-hub-motor/






  2. #2
    Senior Member larryrose11's Avatar
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    Is that a PM Motor? What is wrong with it? Can you borrow an inverter to test it out?

  3. #3
    teddillard
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    Yes, the wires feeding into it are frayed, and he tried to solder them but they were exposed. I'm going to start by remaking the wires, I'm not sure how to test the Hall sensors, but there's an Instructable post that talks about it.

    http://www.instructables.com/id/Elec...ace-a-Hall-ef/

    Oh. I see there's no real way to test them... I guess it's easier to replace all three.

    What's an inverter?
    Last edited by teddillard; 16 October 2010 at 1406.

  4. #4
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    Oh. I see there's no real way to test them... I guess it's easier to replace all three.
    Dead easy to test them Ted. Wire a PP3 9V battery across the Red/Blk (pos/neg) and with your DC volt meter measure across Blu/Blk, Yel/Blk and Grn/Blk when you waggle a fridge magnet or whatever over the relevant sensor. The reading should go from high to low or low to high depending on the polarity of the sensor. If you don't see a change, they may be 'current output' devices. You can check these by putting a resistor (1K to 47K range) in series with your meter probes. Set your meter to DC milliamps and probe between Blu/Red, Yel/Red and Grn/Red when waggling.
    Caveat, some sensors only good for 5V so PP3 (9V) might be too much, but unlikely.
    Also, can you check with a meter the value of those resistors. I see they say 470, but in normal surface mount world that means 47 ohms i.e. 47 and no zeros. Seems very low to me, I'd expect 471 at least i.e. 47 and one zero .. 470 ohms.

    Rob
    Last edited by magicsmoke; 17 October 2010 at 0115.

  5. #5
    teddillard
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    how do you know this ****? lol!

  6. #6
    teddillard
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    wait, I should ask, how the **** do you know this ****?

  7. #7
    Senior Member harlan's Avatar
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    My Social Networking

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    Hacked my magura throttle with one of those hall effect sensors. Throttle response is much smoother than with the POS trimmer that it had before.

    IMAG0103.jpg

    IMAG0102.jpg

    IMAG0104.jpg

  8. #8
    SMPS Engineer BaldBruce's Avatar
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    Quote Originally Posted by teddillard View Post
    wait, I should ask, how the **** do you know this ****?
    Because he's Rob and you're not......
    Last edited by BaldBruce; 16 October 2010 at 2045.

  9. #9
    teddillard
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    Quote Originally Posted by BaldBruce View Post
    Because he's Rob and you're not......
    I wanna be Rob when I grow up.

  10. #10
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    how do you know this ****? lol!
    It's my job Ted, it's how I eat.
    If I was paid for my photography Knowledge I'd be on elsoupkitchen.net

    Harlan, that looks like a cool mod. Any chance you could detail it in a thread?

    Rob
    Last edited by magicsmoke; 17 October 2010 at 0511.

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