Find instantaneous electromagnetic torque, Electrical Engineering

Assignment Help:

Consider an elementary two-pole rotating machine with a uniform (or smooth) air gap, as shown in Figure, inwhich the cylindrical rotor ismountedwithin the stator consisting of a hollow cylinder coaxialwith the rotor. The stator and rotorwindings are distributed over a number of slots so that their mmf can be approximated by space sinusoids. As a consequence of a construction of this type, we can fairly assume that the self-inductances Lss and Lrr are constant, but the mutual inductance Lsr is given by

Lsr = L cos θ

where θ is the angle between the magnetic axes of the stator and rotor windings. Let the currents in the two windings be given by

is = Is cos ωs t and ir = Ir cos(ωr t + α)

and let the rotor rotate at an angular velocity

ωm = θ rad/s

such that the position of the rotor at any instant is given by

θ = ωmt + θ0

Assume that the reluctances of the stator and rotor-iron circuits are negligible, and that the stator and rotor are concentric cylinders neglecting the effect of slot openings.

(a) Derive an expression for the instantaneous electromagnetic torque developed by the machine.

(b) Find the condition necessary for the development of an average torque in the machine.

 

2125_Find instantaneous electromagnetic torque.png


Related Discussions:- Find instantaneous electromagnetic torque

Illustrate the satellites in outer space, Illustrate the satellites in oute...

Illustrate the satellites in outer space Satellites in outer space transmit signals to Earth. Computers in vehicles (for example car, airplane or ship) receive and interpret th

Mode1 - power supplies , Mode1 When the positive  pulse  from PWM  is a...

Mode1 When the positive  pulse  from PWM  is applied to the transistor Q shown  in figure  it gets  turned  on. In  this condition current  flows  through  transistor Q and.

Explain the limiting the spectrum, Explain the Limiting the Spectrum Th...

Explain the Limiting the Spectrum This low-pass filter is known an anti-aliasing filter. These filters are originated at the input to most applications. Since they are required

Dual trace and dual beam cro, what is difference between dual trace and dua...

what is difference between dual trace and dual beam cro?

Status signals - pins and signals , Status Signals There are three st...

Status Signals There are three status  signals IO/M s and s 1 . All  these  signals  are output  signals. IO/ M - it is a status  signals  used to distinguish  whether  the

Phase equilibria, distinguish between brittle and ductile fracture

distinguish between brittle and ductile fracture

The potential difference at the battery terminals, Ten 1.5V cells in series...

Ten 1.5V cells in series, each cells having an internal resistance of 0.3Ω, are connected series to a load of 25Ω. Determine : i.The current flowing the circuit

Sinusoidal inverter, i am going to make a sinusoidal inverter as my final y...

i am going to make a sinusoidal inverter as my final year project kindly help me in this regard.How can i make this project?

Illustrate procedure of hex to binary conversion, Q. Illustrate procedure o...

Q. Illustrate procedure of Hex to Binary Conversion? It is also simple to convert from an integer hex number to binary. This is achieved by: Convert the Hex number t

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