The following figures show the diagram of the stator and the rotor of a two-pole DC machine at two points in time. Based on the figure, explain how many parallel paths are there in the armature of this machine? The total number of coils in the armature of this machine is equal to 12 (numbered 1-12 in the figure), Draw the circuit diagram of how the coils are connected to form the windings in the armature that correspond to the two figures. Explain the differences between the two figures and your diagrams. 1100 3-E 101004 10004 N N 10004 9 8 8 (a) 9003 3-E Ho 1010 4 S DOS 12) 6 5 S 7 (b) Figure 3. (a) The armature of the DC machine. (b) One blink later and it is here!

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DC Series Motors

A DC motor is a type of electric motor which converts electric energy into mechanical energy. The forces that are produced by the magnetic field are what those common types of motors rely upon. Either electro-mechanical or electronic, all types of DC motors have some internal mechanism to change the current direction in part of the DC motors. As the DC motors could be powered from existing DC lighting power distribution systems, these motors were the first form of motors widely used. By changing the strength of the current in its field winding or by using a variable supply voltage, the speed of the DC motors can be controlled over a wide range.