Intelitek SCORA-ER 14, User Manual

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DC Motor Structure
The principles of operation of electrical motors in general, and DC motors in
particular, are based on an electrical current flowing through a conductor situated
within a magnetic field. This situation creates a force which acts on the conductor.
Figure 6-5 shows the basic structure and components of a DC motor comparable
to the structure of the motors used in the
SCORA-ER 14
. This motor has three main
components:
• Stator: This is a static component which creates the magnetic field. The
stator may be a permanent magnet, or an electromagnet consisting of a coil
wound around thin iron plates.
• Rotor: This is the component which rotates within the magnetic field. The
external load is connected to the rotor shaft. The rotor is generally composed
of perforated iron plates, and a conducting wire is wound several times
around the plates and through the perforations. The two ends of the conductor
are connected to the two halves of the commutator, which are connected to
the electric current via the brushes.
• Brushes: These connect the rotating commutator to the electric current
source.
Figure 6-5: Basic Structure of a DC Motor
SCORA-ER 14 6 - 4 User’s Manual
9603