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

Voltage divider, I want to know how can i make transformerlass power supply...

I want to know how can i make transformerlass power supply 220v to 48v (8A) and 220v to 24v (8A)

Working principle of an electronic voltmeter, Q.   Explain the working prin...

Q.   Explain the working principle of an electronic voltmeter. Sol. Electronic voltmeter Basic Voltmeter: The addition of a series resistor, or multiplier, converts the

Wireless and communication, With a maximum excess delay of and a chip durat...

With a maximum excess delay of and a chip duration of , the multipath components fall in delay bins. This means that we experience leakage of energy between chips and the channel i

Balanced delta-connected load, Q. A balanced delta-connected load with a pe...

Q. A balanced delta-connected load with a per-phase impedance of 12 + j9  is supplied by a 173-V, 60-Hz three-phase source. (a) Determine the line current, the power factor, th

Design a circuit for indicate the connection of a battery, You are asked to...

You are asked to design a circuit that indicates if a 12 V battery has been connected the correct way around to two terminals, A and B. To do this, you have chosen to use a special

Diode schematic symbol, Diode Schematic Symbol The diode in figure is ...

Diode Schematic Symbol The diode in figure is a unidirectional device. Electron current just only flows in one direction, against the arrow, corresponding to forward bias. The

Harmonics, how harmonics shows effect on power systems?

how harmonics shows effect on power systems?

Lead acid battery, Describe the construction of lead acid battery

Describe the construction of lead acid battery

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