Electric machinery fundamentals
5th Edition
ISBN: 9780073529547
Author: Chapman, Stephen J.
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 1, Problem 1.19Q
What is power factor?
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12.12 In the circuit of Fig. P12.12(a), is(t) is given by thewaveform shown in Fig. P12.12(b). Determine iL(t) for t ≥ 0,given that R1 = R2 = 2 W and L = 4 H.
12.4 Determine the Laplace transform of each of the following
functions by applying the properties given in Tables 12-1 and 12-2
on pages 642-643.
(a) fi(t)=4tet u(t)
(b) f2(t)=10cos (12t+60°) u(t)
*(c) f3(t) = 12e−3(t−4) u(t −4)
(d) f4(t) = 30(e³ +e³t) u(t)
(e) fs(t)=16e2t cos 4t u(t)
(f) f6(t)=20te 2 sin 4t u(t)
a) Calculate the values of v and i.
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1A Va 82
b) Determine the power dissipated in each resistor. 1A Va
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50 V 0.2 S
(b)
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+
1 Α υ€ 20 Ω
50 V 250 ΩΣ
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Chapter 1 Solutions
Electric machinery fundamentals
Ch. 1 - What is torque? What role does torque play in the...Ch. 1 - What is Amperes law?Ch. 1 - What is magnetizing intensity? What is magnetic...Ch. 1 - How does the magnetic circuit concept aid in the...Ch. 1 - What is reluctance?Ch. 1 - What is a ferromagnetic material? Why is the...Ch. 1 - How does the relative permeability of a...Ch. 1 - Prob. 1.8QCh. 1 - What are eddy current losses? What can be done to...Ch. 1 - Why are all cores exposed to ac flux variations...
Ch. 1 - What is Faraday law?Ch. 1 - What conditions are necessary for a magnetic field...Ch. 1 - What conditions are necessary for a magnetic field...Ch. 1 - Prob. 1.14QCh. 1 - The linear machine in Figure 1-19 is running at...Ch. 1 - Just how does a decrease in flux produce an...Ch. 1 - Will current be leading or lagging voltage in an...Ch. 1 - What are real, reactive, and apparent power? What...Ch. 1 - What is power factor?Ch. 1 - Prob. 1.1PCh. 1 - A flywheel with a moment of inertia of 4kgm2 is...Ch. 1 - A force of 10 N is applied to a cylinder of radius...Ch. 1 - A motor is supplying 50Nm of torque to its load....Ch. 1 - A ferromagnetic core is shown in Figure P1-2. The...Ch. 1 - A ferromagnetic core with a relative permeability...Ch. 1 - A two-legged core is shown in Figure P1-4. The...Ch. 1 - A core with three legs is shown in Figure P1-5....Ch. 1 - A two-legged core is shown in Figure P1-4. The...Ch. 1 - A wire is shown in Figure P1-7 that is moving in...Ch. 1 - Repeat Problem 1-10 for the wire in Figure P1-8.Ch. 1 - Prob. 1.12PCh. 1 - A core with three legs is shown in Figure P1-10....Ch. 1 - A two-legged magnetic core with an air gap is...Ch. 1 - A transformer core with an effective mean path...Ch. 1 - The core shown in Figure P1-2 has the flux shown...Ch. 1 - Prob. 1.17PCh. 1 - Prob. 1.18PCh. 1 - Prob. 1.19PCh. 1 - Demonstrate that Equation (1-59) can be derived...Ch. 1 - Prob. 1.21PCh. 1 - Prob. 1.22PCh. 1 - For the linear machine of Problem 1-22: When this...
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- Exercise 3-12: Find the Thévenin equivalent of the circuit to the left of terminals (a, b) in Fig. E3.12, and then determine the current I. 502 502 0.6 Ω 20 V | + <302 Ω ΣΙΩ b 2025 Ω 15A Figure E3.12arrow_forward2. Consider following feedback system. r(t) e(t) y(t) K G(s) 1 where G(S) = s²+as+b In above, K, a and b are constants. Select the values of K, a and b in a way so that (i) (ii) (iii) the closed loop system is stable, steady-state error of the closed-loop system for step input is 0.2, the closed-loop response has 20% overshoot and 2 seconds as settling time.arrow_forward4. Answer the following questions. Take help from ChatGPT to answer these questions (if you need). But write the answers briefly using your own words with no more than two sentences, and make sure you check whether ChatGPT is giving you the appropriate answers in the context of class. a) What is the advantage of the PI controller over the proportional controller? b) What is the advantage of the PD controller over a proportional controller? c) In the presence of noise, what problem do we face implementing the derivate part of the PID (or PD) controller? To address this, what do we usually use? d) What are the forms of lead compensator and lag compensator? How do these two types of compensators differ?arrow_forward
- 3. Consider the following closed-loop system as shown in the figure. 16 Ge(s) s(s + 4) Suppose Ge(s) is a PID controller with Kp = 1, KD = 2 and K₁ = 3. a) Find the controller transfer function G₁(s). b) Find the open-loop transfer function. c) Find the closed-loop transfer function.arrow_forwardExercise 3-12: Find the Thévenin equivalent of the circuit to the left of terminals (a, b) in Fig. E3.12, and then determine the current I. 502 5 Ω 0.6 Ω a 3Ω ΣΙΩ b 20 V 1 + 2027 15A Figure E3.12arrow_forwardsolve and show workarrow_forward
- Don't use ai to answer I will report you answerarrow_forwardvalues. 4. Discussion: DEPA الأمهريائية RING Compare between theoretic bination effect of Kp and KI at first order and second order systems regarding steady-state errors and transient responses with the practical. In Experiment PI Controllerarrow_forwardⓇ 1. Discuss the relationship between DMA-out and A-out signals. 2. Explain the results of steps 3 and 4 in Experiment 16-2. Unit 16 CVSD System Table 16-2 CVSD demodulator (CLK out - 90KHz) A-in Input Signal DMD-out Waveform & Frequency DMA-out Waveform & Frequency TKHz 1Vpp Sinewave 3KHz 1Vpp Sinewave 200Hz 1Vpp Sinewavearrow_forward
- 3. Describe the function of the lowpass filter (LPF) used in CVSD system.arrow_forwardDon't use ai to answer I will report you answerarrow_forwardRL +Vcc a VCE 2. a) For the direct coupled class A amplifier shown, derive the expression for efficiency in terms of maximum and minimum values of currents and voltages. b) Determine the maximum efficiency of this circuit. c) Derive the expression for maximum power dissipation. www 9 www RB in VBEarrow_forward
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