Difference Between Pump and Motor | Electrical Engineering

  • The motor is an electromechanical device, which consists of rotating conductors and magnetic field to transform electrical energy into mechanical torque. Whereas pump is a hydro-mechanical device that converts mechanical torque into hydraulic/pressure energy.

  • Motoring action ( electric one ) obtained based on Faraday’s law of electromagnetic induction and motor law. Whereas pumping action achieved either by dynamic action (roto-dynamic) or positive action (+ve displacement).
  • Electrical motors can be considered as prime mover (actually it is not ). Whereas pump considered as a hydraulic machine which raises the pressure of the fluid.
  • Motor and pump are coupled together so mechanical torque developed by motor would drive the hydraulic pump.

pump

  • Both pump and electric motor are the piece of equipment work on the principle of conservation of energy since it deals with the transformation of energy.
  • (So energy loss can also be considered a comparison parameter.) Motoring loss happens in form of stray loss (Cu loss + core loss ), mechanical loss at bearing etc. Whereas in pumping loss takes place in form of pressure drop due to fluid friction.

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