A 3 phase 6 pole, asynchronous AC motor

stator resistance 0.34 ohms

rotor resistance 0.12 ohms

stator inductance of 0.5H

rotor inductance of 0.2H

magnetizing inductance 12.35

a)Draw the equivalent electrical circuit for this motor for 1 phase

b) is slip s=0.3 find the speed, torque, current at the stator and efficiency if the voltage supply is 240V per phase at 70 Hz with a Wye connection

Name some applications of PWM and explain how they work.

An input transmission line of characteristic impedance Z01 splits off into three identical output transmission lines having characteristic impedance Z02 = 3Z01. This represents a four-port system. Find all 16 of the S parameters for this system. Note: Many of the 16 Sij parameters will be identical. There should be only four values that are distinct.

SHOW WORK!!

a. Derive the expression for the capacitance of a parallel plate having two dielectric
field.

b. Write a short note on the magnetization of the following magnetic material?
i. Diamagnetic
ii. Paramagnetic
iii. Ferromagnetic

c. Derive the expression for torque developed in a rectangular closed circuit current (I) in a
uniform field?

A 20KVA , 2400/240 single-phase transformer has Reqp=4.45 ohm and
Xeq1=6.45 ohm, Plot the voltage regulation as load current increased
from no-load to full-load at different power factor 0.85 lagging, 1.0 and
0.85 leading using Matlab.

Question 1

A stepper motor advances 2.5̊ per step.

How many pulses are needed to complete 3 revolutions?

Explain what is meant by normal drive, wave drive and half-step drive.

Why is viscous damping employed in stepper motors?

When a stepper motor is ramping or slewing properly, every pulse corresponds to a precise angle of rotation. True or false?

Compare the working of an Induction motor with a synchronous motor.

The total current density in a semiconductor is given as constant and Jtop = -20 A / cm ^ 2. Total current density is the sum of the hole drift current density and the electron diffusion current densities. The hole density in the crystal is constant and p = 0.64 * 10 ^ 10 cm ^ -3. Electron density (to be written in x distance micrometer) is given as n (x) = 2 * 10 ^ 15 * e ^ (- X / L) cm ^ -3 and L = 20 micrometer. Since the diffusion coefficient of electrons is Dn = 26 cm ^ 2 / s and the mobility of the holes is n = p = 440 cm ^ 2 / Vs:

a) Find the variation of the electron diffusion current density depending on the location and draw approximately by stating the important values,
b) Find the variation of the electric field applied to the semiconductor depending on the location and draw the approximate values by drawing them approximately,
c) Find the variation of the hole drift current density depending on the location and draw approximately by specifying the important values.

I need quick answer please.Thank you

A system is described by the differential equation −5y′′(t)−3y′(t)+3y(t)=ys(t), Find the transfer function associated with this system H(s). Write the solution as a single fraction in s. H(s)=_______________?

Hello, Can someone please give me an an example of NZVC flag being adjusted based of the addition of two binary numbers . For example 11001001 and 10000101. Please show all the steps, provide the value for the NZVC flag and explain why it changes. Thank you very much.

A single-phase transformer of 3 kVA, 60 Hz, has a voltage ratio on open circuit of 240 / 120 V. The primary and secondary resistances are 0.25 Ω and 0.05 Ω respectively, the corresponding leakage reactance being 0.75 Ω and 0.18 Ω. The transformer delivers current to the load at a 0.9 power factor lagging.

1. Determine the voltage across the load.                                                                  
2. Determine the power dissipated by the load.                                                         
3. Determine percentage voltage regulation referred to the secondary side.

How the boost dc to dc convertor work.? Theorytical and mathmatical?

What is the effect of inductance and capacitance on boost convertor?

A DC shunt motor drives a centrifugal pump at a speed of 1000 rpm when the terminal voltage and line currents are 200 V and 50 A, respectively. Given the armature resistance, Ra = 0.1 ohm and field resistance, Rf =100 ohm. Design a circuit which the speed of the motor can be controlled by using the added resistance method to the armature circuit and the maximum starting current is 120 A. Next, if the added resistance in the designed circuit above can be adjusted so that the speed is 800 – 900 rpm, analyze the minimum and maximum values of the resistance should be adjusted in the armature circuit. Then, design a circuit which the terminal voltage can be adjusted so that a conveyor can be operated at speed 745.46 rpm.

If you are trying to build a robot that can work in a mine. Explain how the photodiode, phototransistor and photocell can be used in this robot as sensor based on their functionality