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

Find the net force experienced by a positive charge, Q. Two charges of equa...

Q. Two charges of equal magnitude 5µC but opposite sign are separated by a distance of 10 m. Find the net force experienced by a positive charge q = 2 µC that is placed midway betw

Return instructions , Return Instructions These instruction  are used ...

Return Instructions These instruction  are used to transfer the program sequence from subroutine to the  calling program. Basically  it restores the  previous  contents  of th

Device switching losses and snubbers, May I know if your site can help me w...

May I know if your site can help me with design a snubber and model the circuit using LTSpice software?

Explain pulse-code modulation, Q. Explain Pulse-Code Modulation? PCM is...

Q. Explain Pulse-Code Modulation? PCM is the simplest and oldest waveform coding scheme for processing an analog signal by sampling, quantizing, and binary encoding. Figure sho

Operation of a transistorized phase shift oscillator, Q. Discuss the operat...

Q. Discuss the operation of a transistorized phase shift oscillator with the help of a diagram? Explain the phase shifting circuit? An oscillator is a circuit which converts elec

Applications of semiconductors, Applications of Semiconductors Inte...

Applications of Semiconductors Integrated circuits (ICs) SSI, MSI, LSI, and VLSI. Fluorescent materials used in TV screens II-VI (ZnS). Light detectors InSb, CdSe, Pb

SINGLE-PHASE INDUCTION MOTORS MOTORS, HOW DOES SINGLE PHASE INDUCTION MOTOR...

HOW DOES SINGLE PHASE INDUCTION MOTORS DEVELOP A STARTING TORQUE ?

Explain the term- electronic mail, Explain the term- Electronic Mail (email...

Explain the term- Electronic Mail (email) Another form of communication is through email. This has the below advantages over video conferencing: -  There are no language pro

Explain working of cardiac pacemaker, Q. Explain working of Cardiac Pacemak...

Q. Explain working of Cardiac Pacemaker? When blockage occurs to the biological signals that stimulate the heart to beat, the application of electric pacemaker pulses forcing t

Calculate the antenna parameters, For a helical antenna, the half-power bea...

For a helical antenna, the half-power beamwidth and directive gain are given by where C = πD, N = L/S, and S = C tan α,in which α is called the pitch angle, and The

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