Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 15, Problem 3SQ
To determine
State the differences between flow switch and two-way solenoid valve.
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A3 ϕ, 15 kV, 60 Hz, 30 MVA, Y-connected cylindrical-rotor synchronous machine generator has Ra =0.5 Ω per phase and Xs =5.2 Ω per phase. The generator delivers the rated load at 15 kV and 0.85 lagging power factor. Determine the excitation voltage, Ef, for this operating condition.
A3 φ, 50 Hz infinite bus bar is connected to two synchronous generators. Generator 1 has a speed of 300 rpm and generator 2 has 30 poles. Determine:
the speed of generator 2
the number of poles of generator 1
2. Triple Integral Applications
2a.
First step Darw the volume of the solids in the first octant which bounded by xy-plane, yz-plane, plane
x+y=4 and z. = x2+6.
2b.
First draw the region bounded in between z = p and z=1, side by the cylinder r? ≤ 4, and in the first and second octant. Defermine its volume by using cylindrical coordinate system.
2c. Solving Using Spherical Coordinates
2c.
First draw the volume of region which is bounded above by sphere of
x? + y2 + 2? = 81 and below by cone z = x? + y? in the first octant.
first step drawing second step calculation
i need to cal by hand
Chapter 15 Solutions
Electric Motor Control
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- Armature reaction in an alternator primarily affects: A: rotor speed B: terminal voltage per phase C: frequency of armature current D: generated voltage per phasearrow_forwardAs the load of a 3-phase synchronous motor increases, the speed: a: Decreases b: Increases c: Does not change d: Increases then decreasesarrow_forwardconfiguration to Q2: Design bio-electronics circuit using two inverting an operation-amplifier produce the output voltage Vo=10V1-8V2-0.8V3+12V4 choose RF-100KQ2. What's the type circuit.arrow_forward
- configuration to Q2: Design bio-electronics circuit using two inverting an operation-amplifier produce the output voltage Vo-10V1-8V2-0.8V3+12V4 choose RF-100K2. What's the type circuit. [5] Marrow_forwardDon't use ai to answer I will report you answerarrow_forwardThe capacitor shown in the figure below is initially discharged. At t=0s the switch is moved to position B. Determine an expression for the voltage V across the capacitor for t≥0sarrow_forward
- 4,57. Consider a discrete-time LTI system whose system function H(z) is given by Z H(z) Z- (a) Find the step response s[n]. 1 |z|> 2 (b) Find the output y[n] to the input x[n] = nu[n]. Ans. (a) s[n] = [2-()"]u[n] (b) y[n]=2[()" + n − 1]u[n] -arrow_forward4.56. Consider the system shown in Fig. 4-10. (a) Find the system function H(z). (b) Find the difference equation relating the output y[n] and input x[n]. Ans. (a) H(z) = + 7 -1 1+a,z+azz-2 (b) y[n]+a, y[n − 1]+a₂y[n-2]= box[n] + b,x[n − 1] + b₂x[n-2] x[n] a₂ b₂ Z-' b₁ bo Σ Σ y[n] Fig. 4-10arrow_forwardQ1:For the network of figure, determine: 1-Av,AI,ZIN,Zo and Avs. if hie-1.8KQ, hre=2*10-4, hfe-120 and hoe-25μs. 2-S(Ico),S(VBE),S(ẞ) using T₁ as the temperature at which the parameter values are s and ẞ(T2) as 20% more than ẞ(T1). の 3-Determine the net change in Ic if a change in operating condition results in Ico increa 0.2μA to 10uA,VBE drops from 0.7 to 0.6 and ẞ increase 20%. 4-Find the change in Ic if the temperature increase from 20 to 80 [C] +16 3 kohm 220 kohm 20 MF Ikohm HOME HE 120 mv B4= www B 12 kohm 200 ohm Ikohm 20MF 10arrow_forward
- 4.55. Consider the system shown in Fig. 4-9. Find the system function H(z) and its impulse response h[n]. 1 Ans. H(z) = 1- ½-1 h[n] = { } }) un u[n] x[n] + Σ Fig. 4-9 y[n]arrow_forwardDon't use ai to answer I will report you answerarrow_forward4.58. Consider a causal discrete-time system whose output y[n] and input x[n] are related by y[n]-[n-1]+[n−2] = x[n] (a) Find its system function H(z). (b) Find its impulse response h[n]. Ans. (a) H(z) = z² (z)(z)' (b) h[n]=[3()" - 2()"]u[n] |z|>arrow_forward
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