Define salient-pole rotor construction - synchronous machine, Electrical Engineering

Assignment Help:

Define Salient-pole Rotor Construction - Synchronous Machines?

Salient-pole rotor construction on the other hand, may be used for low to medium speed applications. The machines of this kind are normally multi-pole and have a variable air- gap width. The prime mover is usually a direct- coupled water turbine (as in the Dinorwig pumped-storage scheme previously mentioned) with several 12-pole motor/generators.

635_Define Salient-pole Rotor Construction - Synchronous Machines.png

Figure: 2-pole (a) and 4-pole (b) salient rotors

The rotor diameter is large and its length is quite short whereas the axis of rotation is often vertical to suit the water turbine. However, whatever the rotor (and machine) type, it must be wound for the same number of poles as the stator. The rotor winding carries DC current to produce constant flux per pole. It is therefore the rotation of the rotor with respect to the stator that causes the induction of voltage in the stator windings. The 3-phase stator currents themselves produce another revolving field in a manner analogous to a conventional induction machine. This field rotates at the same speed as the rotor so that it is stationary with respect to the rotor field. It is the magnetic interaction between these two fields that results in the torque production of the machine.


Related Discussions:- Define salient-pole rotor construction - synchronous machine

Explain time-invariant versus time-varying systems, Q. Explain Time-invaria...

Q. Explain Time-invariant versus time-varying systems? When the parameters of a control systemare stationary with respect to time during the operation of the system, the system

Self-inductance and the induced e.m.f, Self-inductance and the induced e.m....

Self-inductance and the induced e.m.f Inductance is the name given to the property of a circuit whereby there is an e.m.f induced into the circuit by alter of flux linkages pro

Metals, Metals, Semiconductors, and Insulators For electrons...

Metals, Semiconductors, and Insulators For electrons to move within an applied electric field there have to be states available to them. A totally filled band ca

What do you mean by external data bus, What do you mean by external data bu...

What do you mean by external data bus? External Data Bus: A bus which connects a computer to the peripheral devices. The microprocessor-8088 has 16-bit registers, 20-bit add

Applications of hall effect, Applications of Hall Effect: (i)  To dete...

Applications of Hall Effect: (i)  To determine whether semiconductor is of n type or p type. (ii) To determine carrier concentration. (iii) Measurement of carrier mobili

Obtain the time domain functions, Let ω = 2π × 60 rad/s corresponding to a ...

Let ω = 2π × 60 rad/s corresponding to a frequency of 60 Hz. (a) Consider v(t) = 100 √2 cos(ωt + 30°) V and i(t) = 10 √2 sin(ωt + 30°) A. Find the corresponding phasors ¯V and ¯

Advantages of an rc coupling over a direct coupling, Q. What are the advant...

Q. What are the advantages of an RC coupling over a direct coupling? Draw a basic Rc coupling network and explain. Figure -RC-coupled transistor amplifier The network

Compute current in given the circuit configuration, Q. Consider the circuit...

Q. Consider the circuit configuration shown in Figure. Let V i = 1V, R 1 = 1000, R 2 = 2000, and A = 3. (a) Compute i 2 . (b) If R 1 changed to 500 , recompute i 2 .

How a nand gate decoder is used for 2716 eprom memory, With neat diagram in...

With neat diagram indicate how a simple NAND gate decoder is used to select a 2716 EPROM memory component for memory locations FF800H-FFFFFH. Simple NAND gate Decoder: As the 2

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