need help with making a 24v DC motor dual use

Discussion in 'The Projects Forum' started by Johnny Gadget, Mar 22, 2016.

  1. Johnny Gadget

    Thread Starter New Member

    Mar 22, 2016
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    building a gas powered bicycle, the kind you peddle and pop the clutch and go, i have a 24v DC motor that I want to implement into the drive chain, I will be using two 12v 17amp batteries, and a thumb type throttle, to use as a forward assist so peddling will not be necessary ! once the motor is running on it's own, I need that forward motion to then drive the DC motor to keep my batteries charged, first of all, even though this sounds real good on paper, is this even possible, and or feasible ? thanks in advance ! new to this forum, here exclusively for this purpose.
     
  2. Wendy

    Moderator

    Mar 24, 2008
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    You mentioned gas power, so it sounds possible. More of a motorcycle though. Why not just use the electric motor to start the gas engine? Either way, sounds complex.
     
  3. #12

    Expert

    Nov 30, 2010
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    Cars do this every day. A battery starts the gas engine, the motor turns an alternator, and the alternator charges the battery. The only difference here is that you want to use the starter motor for an alternator.
     
  4. Johnny Gadget

    Thread Starter New Member

    Mar 22, 2016
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    Yes that is what I want to do ! I am in need of circuit possibilities for sufficiently charging the batteries with the forward motion, I am in need of info in order to isolate the battery power from powering the 24v motor and allowing the DC 24 volt motor back feed into the batteries from the forward motion, my problem is, unlike the alternator this will be driving something where the alternator is passive from another drive source and only supplies voltage
     
  5. shortbus

    AAC Fanatic!

    Sep 30, 2009
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  6. Johnny Gadget

    Thread Starter New Member

    Mar 22, 2016
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    thanks
     
  7. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Just make sure the motor is not a small traction motor which could be a series field, a shunt wound or P.M. type is OK.
    Max.
     
  8. Johnny Gadget

    Thread Starter New Member

    Mar 22, 2016
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    this motor
    Unite MY1016 24V
    is 4" dia. 3" front to back and says unite motor co ltd.would not know the difference from the above mentioned
     
  9. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Appears to be a 350w P.M. DC motor.
    Max.
     
  10. Johnny Gadget

    Thread Starter New Member

    Mar 22, 2016
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    i will be needing to power other things with these batteries, headlight, tail light, turn signals, and an air compressor i will be using a motor controller but i need to figure out how to charge the batteries from the DC motor's motion and still be able to use the accessories which are all 12v.
     
  11. KeepItSimpleStupid

    Well-Known Member

    Mar 4, 2014
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    Can't you PWM the motor output into a capacitor filter (you may not need the filter) to maintain 13.8 V or whatever the float charge is supposed to be?
     
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