Motor-(DC Motor)

DC Motor:

D.C. Motor are seldom used in ordinary application because all electric supply companies furnish alternating current. However,for special application such as in steel mills mines and electric trains it is advantageous to convert alternating current into direct current in order to use d.c. motors. The reason in that speed/torque characteristics of d.c. motors are much more superior to that of a.c. motors. Like generators  d.c. motors are also of three types series-wound, shunt wound and compound-wound.The usu of a particular d.c. motor depends upon the type of mechanical load it has to drive