Theoretical Background Electrical Engineering

Running head: THEORETICAL BACKGROUND ELECTRICAL ENGINEERING
Theoretical background Electrical engineering
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1THEORETICAL BACKGROUND ELECTRICAL ENGINEERING
Synchronous Machine
Synchronous machine is a combination of synchronous motors and asynchronous
generator. Application of DC system is always beneficial than the AC systems. Synchronous
machine rotates in a steady speed known as synchronous speed in the stable situations. In case of
synchronous machine the dc excitation is supplied to the rotor field winding and then the
alteration current (AC) flows or directed to the armature winding. In order to produce the field
flux permanent magnet is used in the permanent magnet synchronous machine. It has been
determined that, as per requirements the synchronous machine can be used either as a motor or
as a generator. The AC system is always utterly used for transmission, distribution and power
generation.
Figure 1: Synchronous generator
The configuration of such synchronous system is elaborated in the below section. The
synchronous generator converts the mechanical power into electrical power on the other hand the
similar machine can be operated as a synchronous motor. Successful learning of synchronous

2THEORETICAL BACKGROUND ELECTRICAL ENGINEERING
machine will help the learners to understand its operational principles and features of both the
generators and motors. The synchronous motor is comprises of a cylindrical stator and a
cylindrical rotor that are coaxial. The materials used to made bodies of rotor and stator are
extremely permeable material. Apart from that, stator of the synchronous machine is comprises
of three distribution windings. The stator winding is also known as armature winding and this is
mainly designed for high current and high voltage.
Figure 2: Synchronous motor
The synchronous machine’s rotor is an electromagnet which contains windings also
known as field winding. As the rotors starts rotating, in order to connect the rotor winding with
the sc voltage brushes and slip rings are used. However, in order to avoiding usage of brushes
and slip rings for larger machines the special dc power sources are mounted. Two different types
of rotors are used to process the synchronous machines.