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Resistance to Torque: Electric Motors

Discussion in 'Sensors and Actuators' started by gregorylights, Mar 13, 2014.

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  1. gregorylights


    Mar 10, 2014
    Quick Questions:

    Does High Resistance in a Electric Motor result in Higher Torque in any way? Also does the wire diameter from the battery to the motor have a large impact in Resistance?

    Running 13 AWG Copper Flex Wire: If I go to 10AWG Copper Flex Wire will it lower Resistance Very much:

    Only running 4.2 Volts to the motor:

  2. davenn

    davenn Moderator

    Sep 5, 2009
    unless the cable from the battery to the motor is many metres long going from 13 to 10 awg isn't going to make any significant difference

    having thicker cables makes a difference with longer cables to 1) avoid excessive voltage drop and 2) when higher currents are being supplied/drawn by the motor or whatever other circuit

    There is a relationship between voltage drop and high currents
    one affects the other

  3. Arouse1973

    Arouse1973 Adam

    Dec 18, 2013
    I don't think higher resistance would help at all Gregory. For a DC brushed motor. If you increase the resistance you would reduce the RPM. Torque is rotational power divided by angular velocity. Both of which would reduce with added resistance so at best with a very small increase in resistance it may stay the same, but I am no motor expert.

    The wire will have an impact on the motor depending on the size difference of the wires. In your case the difference in resistance per foot is about half.
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