for the unity feedback system, the open loop transfer functions
is
G(s)=K(s+2)(s+3) / (((s^2)+2*s+2)(s+4)(s+5)(s+6))
a. sketch the root locus (detail step wise)
b. find the jw-axis crossing and the gain. K, at the crossing
In: Electrical Engineering
Design a 4-to-16-line decoder by using the minimum number of
2-to-4-line decoders. The 2-
to-4-line decoders have an enable input (‘1’=enabled) and the
designed 4-to-16-line decoder
does not have an enable. Name the inputs A0...A3 and the outputs
D0...D15.
In: Electrical Engineering
A DC shunt motor is designed without compensating windings. If there is no compensating winding then the effect of armature reaction will exist. What effect does armature reaction have on the torque-speed characteristic of a shunt DC motor? Explain mathematically in detail. What can be done to remove this problem completely?
In: Electrical Engineering
1, Sketch a second order LC filter, determine the transfer function and the cut-off frequency
2, Explain the 6 classification of filters
In: Electrical Engineering
Re-submission of question. Consider the full-bridge Single-phase inverter with input voltage equal to 200V. This inverter is controlled by Sinusoidal PWM technique with amplitude modulation index equal to 0.5 to generate a 3-level half-wave symmetry with frequency equal to 50Hz. (a) Draw its power circuit [solved by an expert] (b) Obtain its switching table [solved by an expert] (c) Calculate the width of each generated pulses at the output [solved by an expert] (d) Calculate the RMS value of output voltage [solved by an expert.] (e) Calculate the amplitude of fundamental frequency ( Not solved ) (f) Draw the waveform reference and carrier signals [Not solved ] (g) Obtain the waveform of output voltage [Not solved ] (h) Design the trigger signals of switches [Not solved ].Hoping to have the remaining answers.Thank you.
In: Electrical Engineering
Draw the equivalent circuit of a transmission line and hence write the transmission line equations for an elemental section of a transmission line.
In: Electrical Engineering
Electromagnetics
Question B1.
(a) A generator with Vg = 300 V, and Zg = 50 Ω is connected to a load ZL =75 Ω through a 50-Ω lossless transmission line of length, l = 0.15λ. Determine the,
(i) Zin, the input impedance of the line at the generator end;
(ii) input current I i and voltage Vi ;
(iii) time-average power delivered to the line, = 0.5 x Re{V .I*};
(iv) load voltage VL, and current, IL; and
(v) the time-average power delivered to the load, = 0.5 x Re{VL .IL*};how does compare to ? Explain?
(vi) compute the time average power delivered by the generator, Pg , and the time average power dissipated in Zg . Is conservation of power satisfied?. [12 marks]
(b) A team of scientists is designing a radar as a probe for measuring the depth of the ice layer over the antarctic land mass. In order to measure a detectable echo due to the reflection by the ice-rock boundary, the thickness of the ice sheet should not exceed three skin depths. If ε' = 3 a n d ε'' = 10-2 for ice and if the maximum anticipated ice thickness in the area under exploration is 1.2 km, what frequency range is useable with the radar? [6 marks]
(c) A 0.5-MHz antenna carried by an airplane flying over the ocean surface generates a wave that approaches the water surface in the form of a normally incident plane wave with an electricfield amplitude of 3,000 (V/m). Sea water is characterized by μr = 1, εr = 72, and σ = 4 S/m. The plane is trying to communicate a message to a submarine submerged at a depth d below the water surface. The submarine’s receiver requires a minimum signal of 0.01 μV/m amplitude, what is the maximum depth d to which successful communication is still possible? [7 marks]
In: Electrical Engineering
The Views options of the insert component dialog box allows you to insert components symbols in a drawing
A. inline with connectors
B. above or below the wire
C. with or without text
D. with or without JIC symbols
In: Electrical Engineering
full and elaborate theory regarding induction type Instruments
In: Electrical Engineering
12.5.1 - What bit in the TBxCCTLn register is used to put the CCR system into capture mode?
Question 1 options:
CAP |
|
CM |
|
CCIS |
|
CCI |
12.5.2 - What bits in the TBxCCTLn register are used to control the edge polarity that triggers a capture?
Question 2 options:
CM |
|
CAP |
|
CCIS |
|
CCI |
12.5.3 - What bits in the TBxCCTLn register are used to select the source for the capture triggering signal CCI?
Question 3 options:
CAP |
|
CCI |
|
CCIS |
|
CM |
12.5.4 - How can a capture event be generated by software?
Question 4 options:
Use an external computer to send in an edge to the CCIxA bit. |
|
You can set the trigger bits in the Status Register. |
|
By resetting the CPU while the capture timer is running in the background. |
|
By setting the capture mode to "both edges" and then toggling the input select lines between GND and VCC. |
In: Electrical Engineering
A Si pn junction has a circular cross section with a diameter of
10 μm. This junction
has Na = 1018 cm-3 on one side and Nd = 5 x 1015 cm-3 on the other.
Calculate Xn, Xp,
Q+ (total charge on n side), and E for this junction at equilibrium
(300 K). Sketch E(x)
and charge density to scale.
In: Electrical Engineering
Describe the advantages of pulse width modulation (PWM) switching for the inverter control. Then state 3 types of PWM switching scheme available.
In: Electrical Engineering
Please give brief descriptions and examples with
diagrams on
TXCVR
TYPES OF COMMON FILTERS
BER VS POWER RELATIONSHIPS IN DB SCALE
In: Electrical Engineering
A sinusoidal voltage is given by v(t)=7 cos(172t+28o) V. What is the first time in ms for t>0 for which v(t) has a zero crossing?
In: Electrical Engineering
Solve the following system :
w ′ + y = sin x
y ′ − z = ex
z ′ + w + y = 1;
w(0) = 0, y(0) = 1, z(0) = 1
In: Electrical Engineering