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Types of D.C. Motors
A d.c. motor converts the electrical energy into mechanical energy. A d.c. generator may be made to function as a motor by applying a suitable source of direct voltage across the normal output electrical terminals.
There are various types of d.c. motors, depending on the way the field coils are connected. Each has characteristics that are advantageous under given load conditions (fig. 13). Special types of motor can also be found on board ships. DC commutator motors are often used for driving deck manually where speed control is important and single-phase ac motors are used in low power drives such as galley equipment.