|
DC Motor
DC motors are part of the electric motors
using DC power as energy source. This device transform electrical energy
into mechanical energy. The basic principle of DC motors is same as
electric motors in general, the magnetic interaction between the rotor
and the stator that will generate spin.
How does DC Motor Work
Graphically, the working principles of DC motors can be seen in Figure 1
below.
Figure 1. Principle of DC motor
When DC electric current flowing in the coil in accordance with the
direction of the arrow, while the direction of the magnetic field B is
from north to south pole, the coil will be driven by the force F in the
direction as shown in Figure 1. This condition occurs continuously so
will result in rotation on the axis of the coil. The direction of the
electric current in the coil is fixed, because of the split ring on the
end of the coil.
Classification of DC motors
Based on the type of magnetic field, a DC motor which is divided into 2
types of permanent magnets and the magnets are not permanent. For DC
motors with permanent magnet is not divided into 2 of strengthening
their own magnetic field and magnetic field outside reinforcement. For
DC motors with strengthening itself, divided into the type 3 field coils
in series, shunt and compound. Graphically the types of DC motors is
depicted in Figure 2.
Figure 2. Classification of DC motor (a. Outer exciter, b. Series motor,
c. shunt motor and
d. compound motor)
| 