Torque of prime movers : a general question

zaveri

zaveri

@zaveri-5TD6Sk Oct 26, 2024
Now when a prime mover like an electric motor or an I.C engine is designed to deliver a particular torque, then does this actually include the self weight of the crankshaft & flywheel /armature shaft ?

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  • Jeffrey Arulraj

    Jeffrey Arulraj

    @jeffrey-xA7lUP Dec 9, 2012

    The generated torque is spent in exerting work in the related drives The total torque produced is capable of supplying the torque lost in the driving process and the rest is got as torque op from the prime mover


    Tsh= Tg - mechanical losses

    Tsh= shaft torque
    Tg generated torque
  • zaveri

    zaveri

    @zaveri-5TD6Sk Dec 9, 2012

    No dude, what i meant to ask is that is any torque required to drive the engine/motor shaft ?
  • Jeffrey Arulraj

    Jeffrey Arulraj

    @jeffrey-xA7lUP Dec 9, 2012

    Obvious Buddy if any device has to be moved from rest in a curved path a torque is required for this work to be done.

    I am not clear here buddy of the need here do clear
  • zaveri

    zaveri

    @zaveri-5TD6Sk Dec 9, 2012

    #-Link-Snipped-# #-Link-Snipped-# #-Link-Snipped-#

    can you clarify this guys ?
  • CE Designer

    CE Designer

    @ce-designer-BWq0yl Dec 10, 2012

    zaveri
    Now when a prime mover like an electric motor or an I.C engine is designed to deliver a particular torque, then does this actually include the self weight of the crankshaft & flywheel /armature shaft ?
    They would have to take these things into account upon starting the engine. I am not expert in designing engines but from my knowledge of mechanics this is the only educated answer i have.
  • Ramani Aswath

    Ramani Aswath

    @ramani-VR4O43 Dec 10, 2012

    zaveri
    Now when a prime mover like an electric motor or an I.C engine is designed to deliver a particular torque, then does this actually include the self weight of the crankshaft & flywheel /armature shaft ?
    Yes it does. Because there is inertial energy stored in the rotating the crankshaft & flywheel /armature shaft, which has to necessarily come from the prime mover. When special applications like raising and lowering car windows and such require rapid attainment of speed, printed circuit or 'pan cake' motors with low inertia is used.
    Check this out:
    <a href="https://www.phys.unsw.edu.au/hsc/hsc/electric_motors5.html" target="_blank" rel="nofollow noopener noreferrer">How real electric motors work</a>