Phasor diagram, Electrical Engineering

Assignment Help:

The aim of this question is to help you become familiar with phasor diagrams, and in particular to see how the diagram changes when one of the system parameters (in this case resistance) varies. The diagram (right) represents the approximate equivalent circuit of an induction motor (copper and mechanical losses are ignored, and the permeability of magnetic core is considered infinite), supplied from a constant- voltage source V of angular frequency ω. The power in the fictitious resistance R represents the power converted from electrical to mechanical form, and the value of R is a function of the speed of the motor. Sketch phasor diagrams showing the current and the voltages across R and L when a) R = 0; b) R = 0.1ωL; c) R = ωL; d) R = 10ωL. (Use the same scale for each diagram; calculate angles; and use a protractor or drawing package to produce a set of decent diagrams so that they can be compared easily.

1. You may find it useful to recall the geometrical property of a semi-circle shown in the sketch.

2. Find the value of R (in terms of ωL) that yields maximum power, and the corresponding power.

728_Phasor Diagrams.png


Related Discussions:- Phasor diagram

Efficiency Equations for AC Generators., Most ac generators used in Power S...

Most ac generators used in Power Stations are of the " Flux Cutting " types. Their effiencies range from less than 33% to slightly more than 60%. In their efficiency equations, the

Compute the number of electrons that pass a given point, Q A wire with n = ...

Q A wire with n = 10 30 electrons/m 3 has an area of cross section A = 1mm 2 and carries a current i = 50 mA. Compute the number of electrons that pass a given point in 1 s, and

Obtain a pos expression, Q. The K map of a logic function is shown in Figur...

Q. The K map of a logic function is shown in Figure. (a) Obtain a POS expression and its corresponding realization. (b) For the purpose of comparison, obtain the correspondin

Principle of three-phase synchronous machines, Q. Principle of Three-phase ...

Q. Principle of Three-phase synchronous machines? In fact, with very few exceptions, three-phase synchronous machines are most commonly used for power generation. In general, t

Define the term causality lti system, Define the term Causality LTI System ...

Define the term Causality LTI System Any practical LTI system operating in real time must be "causal" which means that its impulse response {h[n]} must satisfy h[n] = 0 for n

Ldax load accumulator indirect instruction , LDAX  Load Accumulator Indire...

LDAX  Load Accumulator Indirect Instruction This instruction is used to copy data  from memory  location pointed by register  pair only  BC or DE  to the accumulator  HL pair

The quantity of electricity transferred., If a current of 10A flows for fou...

If a current of 10A flows for four minutes, find the quantity of electricity transferred. Quantity of electricity, Q=It coulombs. I =10A and t = 4 × 60 = 240s.  Hence Q =

Rfid, i was told that silicone rubber will stop electricity, but i need mor...

i was told that silicone rubber will stop electricity, but i need more info like how thick and any more info you can share

Determine the voltages vx using voltage division, Q. Determine the voltages...

Q. Determine the voltages Vx using voltage division and equivalent resistor reductions for the circuits shown in Figure.

Compute the ensemble mean and standard deviation, Write three m ?les to gen...

Write three m ?les to generate M ensemble members of length N, for the following three random processes: i) function v=rp1(M,N); a=0.02; b=5; Mc=ones(M,1)*b*sin((1:N)*p

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