d.c. machines

Publisher Summary

This chapter provides an overview on direct current (d.c.). When the input to an electrical machine is electrical energy and the output is mechanical energy, the machine is called an electric motor. Thus, an electric motor converts electrical energy into mechanical energy. The efficiency of an electrical machine is the ratio of the output power to the input power and is usually expressed as a percentage. There are many conductors on the rotating partof a d.c. machine, and these are attached to many commutator segments. The basic parts of any d.c.machine area stationary part called the stator and a rotating part called the armature mounted in bearings housed in the stator. Furthermore, the two principal generator ...

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