Show elementary synchronous machines, Electrical Engineering

Assignment Help:

Q. Show Elementary Synchronous Machines?

The polyphase synchronous machine operates with direct current supplied to the field winding (assumed to be on the rotor, which is usually the case) through two slip rings and with polyphase alternating current supplied to the armature (assumed to be on the stator). The rotormmf, which is obtained froma dc source, is stationarywith respect to the rotor structure.When carrying balanced polyphase currents, the armature winding produces a magnetic field in the air gap rotating at synchronous speed, as determined by the system frequency and the number of poles in the machine. But the field produced by the dc rotor winding revolves with the rotor. To produce a steady unidirectional torque, the rotating fields of stator and rotor must be traveling at the same speed. Therefore, the rotor must turn precisely at the synchronous speed.

The polyphase synchronous machine is one in which the rotor rotates in synchronism with and in the same direction as the rotating mmf wave produced by the stator. Thus for synchronous machineswith polyphase statorwinding, the following equation relatingmechanical and electrical angular speeds is satisfied:

2139_Show Elementary Synchronous Machines.png

or alternatively, the steady-state speed at which the machine operates is known as the synchronous speed, given by

848_Show Elementary Synchronous Machines2.png

where f is the frequency of the system of which the machine is a part and P is the number of poles of the machine.

944_Show Elementary Synchronous Machines1.png


Related Discussions:- Show elementary synchronous machines

Direct tapping and unmetered connections, Direct Tapping and Unmetered Conn...

Direct Tapping and Unmetered Connections Direct Tapping Direct tapping of power by non-customers is widely prevalent. This is mainly in domestic and agricultural categori

Explain the construction of a mosfet, Explain the construction of a MOSFET....

Explain the construction of a MOSFET. Draw the symbols and diagrams of both P-channel and N-channel MOSFET. As JFET and MOSFET also have source, drain and gate. Its gate is ins

Introduction to microprocessors , Normal 0 false false fals...

Normal 0 false false false EN-IN X-NONE X-NONE

Measurment, emitter followers regulator

emitter followers regulator

Derive lames equation for a thick cylinder, Derive Lame's equation for a th...

Derive Lame's equation for a thick cylinder subjected to internal pressure with clean diagrams. Evaluate the maximum and minimum hoop stresses across the section of a pipe of400

Draw a centralized spc organization, Q. Draw a centralized SPC organization...

Q. Draw a centralized SPC organization. Ans: A dual processor architecture can be configured to operate in one of three modes: (i)  Standby mode (ii)  Synchronous dupl

How is energy stored in a capacitor, Energy stored in a capacitor Durin...

Energy stored in a capacitor During charging process by capacitor, it will get energy. Energy is stored in static form. The voltage in capacitor will enhance from 0 volt to E v

Digital frequency meter, Q. Explain digital frequency meter. or E...

Q. Explain digital frequency meter. or Explain principle of digital frequency meter and discuss utility of time base selector with suitable diagrams. Sol. Digital Fr

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd