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PIM / Polaris bicycle motor hub wheel to generic controller

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    PIM / Polaris bicycle motor hub wheel to generic controller

    Hey guys, need help in using PIM / Polaris bicycle motor hub wheel to generic controller. My concern is there is only two thick wires from the hub, not the normally three wires. Any suggestion?
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    #2
    From a quick search, that could be a Duo Drive? If so, it's brushless. Two fat wires means the controller and phase wires are inside the hub motor. You'd need to remove that controller and fit a new one inside the same space, or find a way to extend all the wires need for a controller outside the hub. The latter is near impossible.

    If not brushless, then it's just a DC motor and those are the power wires, you could use them with any DC motor controller.
    Fabrication is fun! Build something today. Show someone. Let them help. Inspire and share. Spread the desire.

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      #3
      Thanks for the reply, it is a Duo Drive, I thought the large controller attached to the top of battery pack was controller? Bit confused on how this works.

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        #4
        Feel free to post more photos. Maybe that is a controller, but then the 2 wires is really confusing...
        Fabrication is fun! Build something today. Show someone. Let them help. Inspire and share. Spread the desire.

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          #5
          Photos of burnt controller, I removed two capacitors and transistor.

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            #6
            Hmm, I can't tell what that is, but I'm not seeing any heavy guage wires. Is that possibly battery management, and onboard charger? Is it labelled?

            Do you have any specs?

            Sorry, I can't tell what you have there.
            Fabrication is fun! Build something today. Show someone. Let them help. Inspire and share. Spread the desire.

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              #7
              The battery case has connector that has thick connector to the two thick wire of the hub motor. The BMS is soldered directly to the battery pack (the large green panel in picture, battery pack underneath). Could not find any specs, other than 44v battery on label.
              Last edited by atrr; 09-13-2019, 11:02 AM.

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                #8
                Ok. Maybe it's a DC motor after all, then. The specs I saw said brushless, but that's 3 power wires

                I guess you could briefly apply, say 12VDC, to those motor cables and see if it spins. If so, it's most likely a PM DC motor. If not, might damage something trying this, I suppose.

                You'd be better off finding specs though. Know what you have.


                Fabrication is fun! Build something today. Show someone. Let them help. Inspire and share. Spread the desire.

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                  #9
                  Tried to open hub to confirm but hex head bolts on hub rounded off when trying to remove. Saw the Polaris promo video for my bike, it states it is brushless. https://www.youtube.com/watch?v=u_B_71DZKCg
                  Last edited by atrr; 09-13-2019, 11:51 AM.

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