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General Interest > Science and Technology
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    #12104907 -

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Edited by bioBot (09/12/19 07:19 PM)

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Re: DC Motor Torque Conversion [Re: bioBot]
    #12104989 -

The torque rating of the motor is not the force required to turn the shaft, but rather the torque output when driven with some particular value of current.

Conversely, the motor can spin as freely as you want when it's not generating electricity (the circuit is open), but as soon as you complete the circuit and put a load on it (the battery), it begins to require at least as much power to turn it as you are storing in the battery (in practice, much more power is required.)

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Re: DC Motor Torque Conversion [Re: ChuangTzu]
    #12105016 -

Gearing it down might help, but you lose to friction.


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You make it all possible. Doesn't it feel good?

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.. [Re: ChuangTzu]
    #12105231 -

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Edited by bioBot (09/12/19 07:20 PM)

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Re: DC Motor Torque Conversion [Re: bioBot]
    #12105297 -

bioBot said:
If you've got a 12v motor hooked to a 12v battery with
a charge controller, there is only going to be energy
flowing in one direction - from the motor, past the
controller and into the resevoir. It does not go back
into the motor.



I never said anything about where energy does or does not flow.  It's not energy flowing back into the motor which makes it harder to turn, it's a locally-created force.  The current induced in the motor's coils by the rotating magnets creates its own magnetic field which is opposite to the one generating the current.  This manifests as a resistance to turning which is proportional in strength to the current being generated and therefore to the power being stored.

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General Interest > Science and Technology
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