Questions
Two parallel connected loads take a total of 2.4 kW, with a 0.8 line delay at...

Two parallel connected loads take a total of 2.4 kW, with a 0.8 line delay at 120 Vrms and 60 Hz. One load absorbs 1.5 kW with a fp delay of 0.707.
Determine:
a) The fp of the second charge
b) The parallel element required to correct the fp of the two loads and convert it to a delay of 0.9

In: Electrical Engineering

A 45-MVA, 13.8 kV synchronous machine is operating as a synchronous condenser, as discussed in Appendix...

A 45-MVA, 13.8 kV synchronous machine is operating as a synchronous
condenser, as discussed in Appendix D (section D.4.1). It’s short-circuit ratio
is 1.68 and the field current at rated voltage, no load is 490 A. Assume the
generator to be connected directly to an 13.8 kV source

a. What is the saturated synchronous reactance of the generator in per unit
and in ohms per phase?
The generator field current is adjusted to 260 A.
b. Draw a phasor diagram, indicating the terminal voltage, internal voltage,
and armature current.
c. Calculate the armature current magnitude (per unit and amperes) and its
relative phase angle with respect to the terminal voltage.
d. Under these conditions, does the synchronous condenser appear inductive
or capacitive to the 11.5 kV system?

In: Electrical Engineering

Assume that you are using a piezoelectric material to build a micro/MEMS actuator beam in order...

Assume that you are using a piezoelectric material to build a micro/MEMS actuator beam in order to pick up a red-blood cell (with mass of ~1picogram or 10-12grams). If the dimensions of this actuator beam are length=100µm, width=10μm, and thickness=1μm, what is the minimal voltage you need to apply to this piezoelectric actuator in order to pick up the red-blood cell? Please write down all your assumptions used to estimate the voltage required.

In: Electrical Engineering

A 280-V, 3Ø AC power system, Y-connected three-phase generator connected through a three-phase transmission line to...

A 280-V, 3Ø AC power system, Y-connected three-phase generator connected through a three-phase transmission line to a Y-connected load. The transmission line has an impedance of (0.02+j0.4) Ω/phase, and the load has an impedance of (4+j3) Ω per phase. Determine the;(a)line current (IL) at the load [2Marks] (b)line and phase voltage of the load[2 Marks](c)active power, reactive and apparent power [2 Marks](d) power factor and specify whether it is lagging or leading. [4 Marks]

In: Electrical Engineering

Please Create the Verilog/Vivado Code For: An LFSR Pseudonumber generator, and the testbench for test it,...

Please Create the Verilog/Vivado Code For:

An LFSR Pseudonumber generator, and

the testbench for test it,

please comment and explain the answer as much as possible

waveform simulation answer would be nice too!

In: Electrical Engineering

stion 3: A half-wave rectifier with a capacitor filter has Vm = 200 V, R =...

stion 3:
A half-wave rectifier with a capacitor filter has Vm = 200 V, R = 1 kw, C = 1000 pF, and
w = 377
(a) Determine the ratio of the RC time constant to the period of the input sine wave.
What is the significance of this ratio? (b) Determine the peak-to-peak ripple voltage
using the exact equations. (c) Determine the ripple using the approximate formula in Eq.
(3-51).

In: Electrical Engineering

Design and model a battery charger with filter, diode bridge, and transformer. The battery to recharge...

Design and model a battery charger with filter, diode bridge, and transformer. The battery to recharge is 12 VDC (auto). Suppose the source is a 120 VAC @ 60HZ residential circuit. The output voltage cannot vary more than 5%. Prepare a cost estimate for your design and compare the cost with business models. Explain the differences in cost. Investigate the environmental and social impact of producing 1,000,000 units of each. Assume that a social job is generated for every $ 50,000 of investment and 1 Lb. of CO2 for each environmental KWH of energy used in the production of the units.

In: Electrical Engineering

Why is the starting current high in a DC motor? Explain the working of a four-point...

Why is the starting current high in a DC motor? Explain the working of a four-point starter for a DC machine.

In: Electrical Engineering

(b) P-type doping in deep ultraviolet AlGaN based LEDs suffer from low hole mobility. (i) Sketch...

(b) P-type doping in deep ultraviolet AlGaN based LEDs suffer from low hole mobility.

(i) Sketch a design of a tunnel junction for a DUV LED operating at 280 nm.

Explain how the tunnel junction operates in a DUV LED.

In: Electrical Engineering

SYSTEM VERILOG: Using your preferred HDL program, design a complete 4-bit Carry Look Ahead (CLA) adder...

SYSTEM VERILOG:

Using your preferred HDL program, design a complete 4-bit Carry Look Ahead (CLA) adder
module.

In: Electrical Engineering

Draw a sample metal detector scenario and explain the target detection principle through the electromagnetic interaction...

Draw a sample metal detector scenario and explain the target detection principle through the electromagnetic interaction equation. Give an example of an application where the metal detector performs well and badly. Which auxiliary sensor can be used to understand that the material is explosive?

In: Electrical Engineering

480 V, 200 kVA, 08 PF lagging, 60 Hz two pole Y connected synchronous generator has...

480 V, 200 kVA, 08 PF lagging, 60 Hz two pole Y connected synchronous generator has a synchronous reactance of 0.25 Ω and an armature resistance of 0.03 Ω. At 60 Hz, its friction and windage losses are 6 kW, and its core losses are 4 kW. The field circuit has a dc voltage of 200 V, and the maximum IF is 10 A. The resistance of the field circuit is adjustable over the range from 20 to 200 Ω. The OCC of the generator is shown in figure

a. How much the field current is required to make VT equal to 480 V when the generator is running at no load? [4.55 A]
b. What the internal generated voltage of this machine at rated conditions? [322 @ 7.8°]
c. How much the field current is required to make VT equal to 480 V when the generator is running at rated conditions? [558 V]
d. How much power and torque must the generator’s prime mover be capable of supplying? [175.2 kW, 465 Nm]
e. Assume that the field current of the generator is adjusted to achieve rated voltage (480 V) at full load conditions in each of the questions below.
1. What is the efficiency of the generator at rated load? [91.3%]
2. What is the voltage regulation of the generator if it is loaded to rated kilovoltamperes with 0.8-PF lagging loads? [16.2%]
3. What is the voltage regulation of the generator if it is loaded to rated kilovoltamperes with 0.8-PF leading loads? [-9.0%]
4. What is the voltage regulation of the generator if it is loaded to rated kilovoltamperes with unity power-factor loads? [5.1%]
f. Assume that the field current of the generator in Problem 5-2 has been adjusted so that it supplies rated voltage when loaded with rated current at unity power factor. (You may ignore the effects of RA when answering these questions.)
1. What is the torque angle δ of the generator when supplying rated current at unity power factor? [12°]
2. What is the maximum power that this generator can deliver to a unity power factor load when the field current is adjusted to the current value? [941 kW]
3. When this generator is running at full load with unity power factor, how close is it to the static stability limit of the machine? [196 kW]
4. Plot the torque angle δ as a function of the power supplied by the generator for these conditions.
3. A 3-phase 50-Hz star-connected 2000-kVA, 2300 V

In: Electrical Engineering

Derive the expressions of the average load voltage and current in single-phase full-wave controlled rectifier (bridge...

  1. Derive the expressions of the average load voltage and current in single-phase full-wave controlled rectifier (bridge rectifier) and resistive load. Draw the waveforms of supply voltage, output voltage, output current and thyristor current.   
  2. In a single-phase full-wave controlled rectifier (bridge rectifier) and resistive load, it is desired to get an average load voltage of 50 V. Determine the firing angle if the ac supply voltage is 150 V. If the average load power is 300W, calculate the average load current and. Design the thyristor.
  3. Derive the expressions of the average load voltage in single-phase full-wave controlled rectifier (bridge rectifier) and highly inductive load. Draw the waveforms of supply voltage, output voltage, output current and thyristor current.
  4. In a single-phase full-wave controlled rectifier (bridge rectifier) and resistive load, it is desired to get an average load voltage of 90 V. Determine the firing angle if the ac supply voltage is 230 V. If the average load power is 270 W, calculate the load current and. Design the thyristor.      Please solve all questions

In: Electrical Engineering

if the received power at a reference distance do=1km, is equal to 1 microwatt, Find the...

if the received power at a reference distance do=1km, is equal to 1 microwatt, Find the received power at distances 21km, 5km,10km and 20km from the same transmitters.
I) free space
ii) n=4
iii) two ray ground reflection using the exact expression.
Assume f=1800MHz.
ht=40,
hr= 3m, Gt=Gr= 0db.

In: Electrical Engineering

Elaborate with your own words the importance of Laplace transform in electric circuit analysis. Explain also...

Elaborate with your own words the importance of Laplace transform in electric circuit analysis. Explain also the applications of Laplace transform in communication systems.

In: Electrical Engineering