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increase 12v DC motor start torque?

Discussion in 'Sensors and Actuators' started by supak111, May 2, 2013.

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  1. supak111

    supak111 ★ƃuᴉɯǝɥɔs sʎɐʍlɐ★

    334
    4
    Apr 29, 2012
    Is there any easy way to increase a 12v DC motors starting torque?

    I just need a bit more power to get the motor going. I know adding more V would do it but I can't do that since the motor is in a car so it constant 12v power lots of amps.

    Can a cap help?
     
  2. supak111

    supak111 ★ƃuᴉɯǝɥɔs sʎɐʍlɐ★

    334
    4
    Apr 29, 2012
    Found some cheap 12v DC to 24v DC step up power supplies but those would make my motor run continuous 24v, I just want say 24v for maybe 1 second at start to get the torque and then back down to 12v so that the motor doesn't overheat.
     
  3. alex2701801

    alex2701801

    1
    0
    Apr 16, 2015
    connect a high value charged capacitor in parellel with motor.It will aid the battery at start.
     
  4. KMoffett

    KMoffett

    723
    75
    Jan 21, 2009
    The capacitor across the motor will do just the opposite. When power is applied it acts as a dead short. It will have to charge up, reducing the voltage to the motor until as it fully charges.

    Ken
     
  5. KMoffett

    KMoffett

    723
    75
    Jan 21, 2009
    That would work. You would need a timer driving a SPDT relay. Or maybe a solid state switch, as the relay's switching time might cause a temporary dropout as it switched from 24V to 12V. I can't say that 24V for a short burst is OK for your motor though.

    Ken
     
  6. Tha fios agaibh

    Tha fios agaibh

    2,166
    726
    Aug 11, 2014
    By the time you add a ps, timer, and a relay, you might be able to purchase a larger motor to give the required torque?

    I would also investigate that the wire size to the motor is sufficient, to minimize voltage drop.
     
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