DC Motors


By definition, it is an electromechanical machine which converts electrical energy into mechanical energy.

By principle, when a current carrying conductor is placed in magnetic field, it experiences a force (Flemings Left hand rule)


F=BIL newtons


Features

          The direct current (dc) machine can be used as a motor or as a generator.

          DC Machine is most often used for a motor. 

          The major advantages of dc machines are the easy speed and torque regulation. 

          However, their application is limited to mills, mines and trains.  As examples, trolleys and underground subway cars may use dc motors. 

          In the past, automobiles were equipped with dc dynamos to charge their batteries.

          The electronically controlled ac drives are gradually replacing the dc motor drives in factories.  





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