A star-connected induction motor has the following rated parameters: Voltage UN = 400 V, current IN = 8 A, frequency fN = 50 Hz, speed nN = 1480 rpm, power factor cos ijN = 0.8, efficiency ȘN = 0.9, magnetizing inductance Lm = 280 mH, stator leakage inductance LVı = 9 mH and rotor leakage inductance LUı = 14 mH.

For the rated operating point of the motor, calculate the per-unit values for electric active power Pel, mechanical power Pmech, magnetizing inductance Lm, stator leakage inductance LVı, rotor leakage inductance LUı, slip s, and the mechanical torque Tmech. Calculate the motor rated power and rated torque (the actual kW and Nm values) using the per-unit values.

Question #1

a) What is the major difference between a 4:1 MUX (multiplexer) and a 2:4
decoder?
b) How many binary inputs would be needed for a decoder with 32
mutually-exclusive outputs? Please explain why.
c) A data acquisition system has only one analog-to-digital (A/D) converter.
You have 12 different analog inputs to select. Which of the following
would you choose?
1) 8:1 MUX
2) 4:16 decoder
3) 16:1 MUX
4) 3:8 decoder
Please explain why.

A 50 ohm transmission line has an unknown load impedance ZL. A voltage maximum occurs at z = -0.15(wavelength). At z = -0.20(wavelength) the real part of the impedance is 30 ohms. Find ZL using the Smith chart.

a-) Provide information about coding techniques used in communication systems.

b-) Explain the reasons and uses of the coding.

For the integration of distributed generation with utility provide the different methods of integration at least 3 (plz type your answer)?

Draw the pin configuration of timer 555 and describe the monostable operation of it.

a) Calculate the electric field of a point P on the perpendicular bisector of a dipole. Also calculate the potential difference from infinity of the point. Also make a sketch of the equipotential lines and the electric field lines. b) Explain what happens if we put a large point charge Q at that point P.

1. three-phase induction motor rated 250 hp, 0.7 pf and 80% efficiency. Determine the minimum size in kVAR of a capacitor needed to prevent overloading the transformers.Two single-phase transformers each rated 150 kVA are connected open delta supplying a

2. A 2.2 kV, 200 hp, delta- connected, 3 phase synchronous motor is operating on full load at an efficiency of 0.88 and pf of 0.8 leading. The armature has a reactance per phase of 5 ohms and negligible resistance. Solve the induced emf per phase.

3.The result of the no load test on a three phase wye connected induction motor are as follows: line to line voltage = 400 V; Input power = 1770 W; Input current = 18.5 A; friction and windage loss = 600 W. determine the magnetizing reactance per phase.

1.Evaluate (1 + a) / (1 + a^2)

2. A generator having a solidly grounded neutral and rated 50 MVA, 30 kV has a positive, negative and zero sequence reactances of 20, 20 and 5 percent respectively. What reactance must be place in the generator neutral to limit the fault current or a bolted single line to ground fault to that for a bolted three phase fault?

3. The positive, negative and zero sequence reactances of a 15 MVA, 11 kV three-phase wyeconnected generator are 11%, 8% and 3% respectively. The neutral of the generator is grounded and is excited to the rated voltage on open circuit. A line to ground fault occurs on phase a of the generator. Calculate the fault current.

Design a 4 to 1 demultiplexer with 2 select inputs B and A, 4 data inputs (D3 to D0), and an output Y. You can use MultiSim with just basic gates (AND, OR, NOT, NAND, NOR, XOR), VHDL, or LabVIEW.

please I will need screenshots for the circuit and successful completion of the simulation. Thanks!

A powerful bipolar permanent magnet stepper motor used for positioning a valve has a rated current of 13 A, a winding resistance of 60 mΩ, a winding inductance of 0.77 mH, a 0.16Nm detent torque, holding torque: 9.5 N.m, torque at 50 steps per second [sps]: 8 N.m. Its step rate is 200 steps per revolution, and the rotor inertia is 0.7x 10- 3 kg.m2.

The motor is chopper-driven at 65 V and it develops a torque of 2.2 N.m at 10000 sps. Calculate:

1. The speed [rpm] and power [hp] of the motor when it is running at 10000 sps.

2. The time constant of the windings

3. The time to reach 13 A when 65 V is applied to the winding

Design a clock display to show the time in hours, minutes, and seconds. Assume that we have a clock of exactly 1 KHz (1000 clock pulses per second). It will use 6 seven-segment displays and operate either in military time (hours 00 to 23) or regular time (1 to 12, with AM and PM). An input line, x, differentiates between the two. A seventh display is used to show A or P in the latter case; it is blank otherwise. Assume that there is a BCD-to-seven-segment decoder driver available; one is needed for each display other than the AM /PM one.

Consider a thin flat rectangular region that of size 4 x 2 m2 and it is electrically insulated at its four corners. (A)Solve Laplace’s equation  2 V(x,y) = 0 in the rectangular region 0 < x < 4 m and 0 < y < 2 m using the separation of variable technique subject to the following boundary conditions:
V(0,y) = 0
V(4,y) = q(y) = 50 sin (3π y / 2)
V(x,0) = 0
V(x,2) = f(x) =100 sin (π x / 4)
(B) Use the result of part (A) to find the corresponding electric field inside the region.