Prime mover

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Prime mover in science and engineering is a machine or component that converts energy from an energy source into motive power.

Prime mover may refer to:


  • Prime mover (engine), a component that transforms the flow or changes in pressure of a fluid, or electrons as in electrical motors, into mechanical force
  • Prime mover (locomotive), one of the several types of power plants used in locomotives to provide traction power
  • Prime mover (tractor unit), a heavy-duty towing engine that provides motive power for hauling a towed or trailered load




  • Prime mover theory (Latin: primum movens), a concept advanced by Aristotle as a primary cause of all motion in the universe

See also[edit]