Principles Of Electric Circuits
10th Edition
ISBN: 9780134879482
Author: Floyd, Thomas L.
Publisher: Pearson,
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Chapter 6, Problem 17RP
Determine the current through RL in Figure 6-З0
FIGURE 6-30
Determine the current through RL if the direction of I2 is reversed.
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Please, I want the solve to the two questions, with a drawing of the equivalent circuit in the case of dc and in the case of small signal.
Q2. For the transformer shown in Fig. 1.
A. Plot the winding connection for the transformer and justify your answer.
(4M)
B. If the transformer is adopted in 12 pulse diode rectifier, where two-series connected
bridge rectifiers are used to supply a highly inductive load with 100 A. (i) Select a
suitable turns ratio for the transformer (ii) Plot the line current of each winding (
secondary + primary) showing the current magnitude at each interval (iii) Use Fourier
Page 1 of 3
analysis to obtain the Fourier series of all line currents then calculate the THD of the
input current.
(8=0°
(16M)
(Y) = 30°
Fig. 1
P. I v
I
Q2. For the transformer shown in Fig.1,
A. Find the phase shift between the primary and star-connected secondary.
B. If the transformer is adopted in a 12-pulse diode rectifier, where a two-series
connected bridge rectifier is connected in series and supplies a highly inductive load
(i) Select a suitable turns ratio for the transformer
(ii) Plot the line current of each winding (secondary + primary).
(iii)Using Fourier analysis to obtain the Fourier series of all line currents, then calculate
the THD of the input current.
(iv) Draw the output voltage of the first and second rectifiers and give the relation of
the total output voltage.
N2
B
C
Fig. 1
N3
a
Chapter 6 Solutions
Principles Of Electric Circuits
Ch. 6 - Five resistors are positioned on a protoboard as...Ch. 6 - How would you connect all of the resistors in...Ch. 6 - If a third branch is added to the circuit in...Ch. 6 - Determine IT and I2 if a fourth branch is added to...Ch. 6 - How much current will an ammeter measure when it...Ch. 6 - When the brake lights are applied, the total...Ch. 6 - If a 33 resistor is connected in parallel in...Ch. 6 - Calculate the total resistance connected to the...Ch. 6 - If two of the speakers are removed, what is the...Ch. 6 - The basic circuit for a rear window defroster can...
Ch. 6 - If you need to obtain a total resistance of 130 ,...Ch. 6 - Sometimes a direct measurement of resistance is...Ch. 6 - Determine the current through RL in Figure 6-0...Ch. 6 - Figure 6-35 Determine the current through each...Ch. 6 - Determine the total amount of power in the...Ch. 6 - The amplifier in one channel of a stereo system as...Ch. 6 - In Figure 6-51, there is a total current of 31.09...Ch. 6 - Your ohmmeter indicates 9.6 k between pin 2 and...Ch. 6 - A 330 resistor, a 270 resistor, and a 68 ...Ch. 6 - Refer to Figure 6-83 If R7 opens, the resistance...Ch. 6 - Determine whether or not all the resistors in...Ch. 6 - The following currents are measured in the same...Ch. 6 - There is a total of 500 mA of current into five...Ch. 6 - In the circuit of Figure 6-65, determine the...Ch. 6 - The electrical circuit in a room has a ceiling...Ch. 6 - The following resistors are connected in parallel:...Ch. 6 - What is the total current in each circuit of...Ch. 6 - Find the values of the unspecified quantities...Ch. 6 - What is the current through each resistor in...Ch. 6 - Determine all of the resistor values in Figure...
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- Q2.A. It is planned to use the transformer shown in Fig. 1, a 12-pulse rectifier. Each secondary is connected to three phase controlled bridge rectifier. The two rectifiers are connected in series to supply a highly inductive load. 1. Based on the phasor relationship between different windings. If suitable turns ratio is selected, is it possible to use this transformer to produce 12 pulse output voltage? Show the reason behind your answer. 2. Assuming this arrangement is possible to be used in 12-pulse rectifier, draw the output voltage of the 1st and 2nd rectifier and give the relation of the total output voltage. 3. Use the Fourier analysis to show the harmonics in all line currents of the transformer. A B in C Fig. 1 b la a 2 b.arrow_forwardDon't use ai to answer I will report you answerarrow_forwardDon't use ai to answer I will report you answer.arrow_forward
- Q5.B How parallel connected DC-DC converters increase the effective switching frequency? Show the advantages and limitations in these converters.arrow_forwardQ4. Give the reasons for the following 1. In AC machines drives, the frequency modulation index should be integer regardless the value of switching frequency. 2. Variable de link voltage is adopted in inverter operating in square wave operation mode 3. Practical values of switch utilization factor is different from theoretical values 4. In three-phase inverter with my is odd and multiple of 3, the even and tripplen harmonics are zero. 5. The PSC-PWM is attractive for the modular multilevel converterarrow_forwardQ6.B. Answer the following questions 1. Does the steady state load current in a half bridge inverter has an average value and what is the adverse effect of the average current component? 2. Can the LPF of single phase bridge inverter based on bipolar PWM be used with single phase bridge inverter based on unipolar PWM? Explainarrow_forward
- Q3. Answer the following questions T 1. Compared to the bipolar voltage-switching scheme, the unipolar scheme is "effectively" doubling the switching frequency. Explain the statement's meaning and how this effect can be generated. 2. What are the properties of a good power switch, and what are its basic ratings? 3. What are the objectives of any PWM strategy for three-phase inverters? 4. Why is the current control PWM rectifier in the dq rotating reference frame preferred over the abc reference frame? 5. Define the switch utilization factor. Show how this factor can be calculated for different single-phase inverters for square wave operation mode at the maximum rated output.arrow_forwardQ1.B. Explain output control by voltage cancellation in a single-phase inverter. What are the advantages over square wave operation?arrow_forwardQ3.B. What is the problem of three-phase HW rectifier and how can be resolved?arrow_forward
- Q3-consider the unity feedback system shown below: a.Evaluate general formula of ess? b.Calculate the steady state error of the closed loop system due to R(s) unit step input, D(s)=0]? c.Calculate the steady-state response when D(s) and ramp and R(s)=0?arrow_forward- = 400KHZ. Q1. In a Boost converter, L = 25 μH, Vin = 12 V, D = 0.4, P = 25 W, and fs (i) if the output load is changing. Calculate the critical value of the output load P,below which the converter will enter the discontinuous conduction mode of operation. Assume the total turn-on loss is equal to 2 W. (ii) Assuming the input voltage fluctuates from 10 V to 14 V and the output voltage is regulated to 20 V. Calculate the critical value of the inductance L below which this Boost converter will enter the discontinuous conduction mode of operation at P = 5 W. (iii) Draw the waveforms for inductor voltage, inductor current, and the capacitor current for this Boost converter at the output load that causes it to operate at the border of continuous and discontinuous modes. vd tow 77 N₂ AT 22 1-1arrow_forwardDon't use ai to answer I will report you answerarrow_forward
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