Question 5

a) Draw the circuit of a Three-phase bridge inverter using a Y-connected load and explain its operation using 180 degree conduction clearly showing the gating sequence and the corresponding output line voltages for each phase. (10)

b) For the Y-connected load determine the line to neutral voltages for the three modes of operations. Draw the equivalent circuits for each mode and then draw the phase voltage waveforms for the 180-degree conduction. (7)

1) . A factory load consists of the following :

(i) an induction motor of 150 h.p. (111·9 kW) with 0·7 p.f. lagging and 80% efficiency ;

(ii) a synchronous motor of 100 h.p. (74·6 kW) with 0·85 p.f. leading at 90% efficiency

(iii) a lighting load of 50 kW.

Find the annual electric charges if the tariff is Rs 100 per annum per kVA maximum demand plus 7 paise per kWh ; assuming the load to be steady throughout the year.

ANS[Rs 1,96,070]

2) . A hydro-electric plant has a catchment are of 120 square km. The available run off is 50% with annual rainfall of 100 cm. A head of 250 m is available on the average. Efficiency of the power plant is 70%. Find (i) average power produced (ii) capacity of the power plant. Assume a load factor of 0.6.

ANS [(i) 3266 kW (ii) 5443 kW]

MATLAB Question

Simulate 10,000 trading interactions of 100 people trading between each other. Interactions are random and between 2 randomly chosen people. Each person starts with $100. In each interaction one person makes $1 and the other loses $1 with 50% chance. Find the distribution of wealth (money per person) after 10,000 trading interactions.

PID controllers consist of Proportional, Integral, and Derivative blocks that manipulate the error of the Process Variable signal depending on their own characteristics. Some controllers use these three blocks while some other controllers use the P block or the P block in conjunction with another one. In any case, the P block seems to be always present.

Discuss if we can have controllers that employ only an I block or a D block alone.

Describe why or why not using these blocks alone is possible and the possible consequences of this type of use.

Explain the technical properties, switching and control processes, usage areas of the Si, Ge and GaN BJT circuit elements with circuit examples. Describe how to calculate the switching power loss in a power transistor, the values and variations of the voltage drop in the transmission state, the characteristics of the snubber and bias circuit. (20 Points)

Given a RC circuit in series , at time t=0, power supply 4v is connected to the circuit causing charging of capacitor, determine at instant 8 seconds :
Where C = 10 mF, R = 4 kOhms, and consider all initial values equal to ZERO.

a) Tension on capacitor;
b) Tension on resistor;
c) total current.

all diagrams pertaining to the mode of operation and construction of induction type instruments

I'm asking for diagrams and explanations for them

1. Write a VHDL mealy state machine that detects the pattern 01110 in a stream of bits. The machine should have three inputs; in, clk, reset. The output of the machine goes high whenever the pattern is detected.

a single stub tuner, connected in parallel, has a 50 ohm main line, and a 50 ohm short- circuited stub .It is used to match a load of Zr = 20+j70 to a 50 ohm system. What are the lengths of the line and stub in centimeters if the single stub tuner is using air filled coaxial lines and the system is operating at 600MHz

Calculate the work done to move a Q= - 10uC load from(0,0,0) m to (6,2,0) m within the elektrick field of

E = (x/3+3y) ax+3xay V/m

Draw the C.S circuit with cascade connection. Explain the features of this C.S over the simple C.S.

Consider the first order linear time-invariant (LTI) system given by,

??(?) ?? + 4?(?) = ?(?)

Where the system is initially at rest.

Part a: Determine the Frequency Response H(jω) and impulse response h(t).

Part b: When the input ?(?) = ?23?(?), determine the output of the system ?(?).

Part c: Is the system; memoryless? causal? Stable? please justify your answer

this has to be coded in c ++

• Write a program which generates a DIFFERENT random number between 1 and 100 everytime you run the program. Please go online and see how poeple are trying to
solve this. You can submit their code. Make sure you include a comment which shows
from where the code was taken. You do not need to understand the code but if you
can, thats great. This program will be used in the upcoming labs so you are strongly
encouraged to do it now so that you can use it later.
• Using the code from Part 1, play a game where you have to guess the random number
generated. When the user makes an incorrect guess, print a message which says that
you either guessed too low or too high. The user gets a total of 5 chances to guess
the number. If the user manages to guess the number within 5 chances, then print a
message saying that the user won the game and took %d chances

Q1: How to draw equivalent induction machine circuit?

Q2: What is the rotor resistance including slip. Why is it R2/s and R2 (s)/(1-s)

Q3: how to find power of the output given torque and speed?

Q4: what are the formulas for Pin?