Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 59, Problem 12SQ
How is a solid-state diode tested? Explain.
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4. a. Determine VDs for VGS = 0 V and ID = 6 mA using the characteristics of Fig. 6.11.
b. Using the results of part (a), calculate the resistance of the JFET for the region ID = 0 to
6 mA for VGS = 0 V.
c. Determine VDs for VGS = -1 V and ID = 3 mA.
d. Using the results of part (c), calculate the resistance of the JFET for the region ID = 0 to
3 mA for VGS = -1 V.
e. Determine VDs for VGS = -2 V and ID = 1.5 mA.
f. Using the results of part (e), calculate the resistance of the JFET for the region ID = 0 to
1.5 mA for VGS = -2 V.
g. Defining the result of part (b) as ro, determine the resistance for VGS = -1 V using
Eq. (6.1) and compare with the results of part (d).
h. Repeat part (g) for VGS = -2 V using the same equation, and compare the results with part (f).
i. Based on the results of parts (g) and (h), does Eq. (6.1) appear to be a valid approximation?
A. Using D flip-flops, design a logic circuit for the finite-state machine described by the
state assigned table in Fig. 1.
Present
Next State
State
Output
x=0
x=1
Y2Y1
Y2Y1
YY
Z
00
00
01
0
01
10
11
888
00
10
0
00
10
1
00
10
1
Fig. 1
Athree phase a.c. distributor AB has:
A
B
C
The distance from A to B is 500 m. The distance from A to C is 800 m.
The impedance of each section is (6+j 8) /km.
The voltage at the far end is maintained at 250 volt.
Find: sending voltage, sending current, supply power factor and
80A
60 A
total voltage drop.
0.8 lag. P.f
0.6 lead. p.f
Chapter 59 Solutions
Electric Motor Control
Ch. 59 - Prob. 1SQCh. 59 - Why should the motor be run for a period of time...Ch. 59 - What may occur if a jumper is placed across coil M...Ch. 59 - In what position do ball-bearing motors function?Ch. 59 - Motors will operate satisfactorily at what percent...Ch. 59 - What basic sensory faculties should a...Ch. 59 - What is an orderly step-by-step procedure in...Ch. 59 - What might be a hazard if a motor is started in...Ch. 59 - Prob. 9SQCh. 59 - What are the probable causes of a noisy magnet?
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- engineering electromagnetics Subjectarrow_forwarda ADI ADI b Co ADDS D Fig.(2) 2-For resistive load, measure le output voltage by using oscilloscope; then sketch this wave. 3- Measure the average values ::f V₁ and IL: 4- Repeat steps 2 & 3 but for PL load.arrow_forwardDetermine the type of media In a certain medium with µ = o, & = 40 H = 12ely sin(x x 10% - By) a, A/m A plane wave propagating through a medium with ɛ, = 8, μ, = 2 has E = 0.5 3sin(10°t - Bz) a, V/m. Determine In a certain medium - E = 10 cos (2 x 10't ẞx)(a, + a.) V/m If μ == 50μo, & = 2ɛ, and o = 0, In a medium, -0.05x E=16e sin (2 x 10% -2x) a₂ V/marrow_forward
- "How can I know if it's lossless or lossy? Is there an easy way?" A plane wave propagating through a medium with &,,-8 μr = 2 nas: E = 0.5 ej0.33z sin (10' t - ẞz) ax V/m. A plane wave in non- · (Mr=1) has: magnetic medium E. 50 sin (10st + 27 ) ay v/m =arrow_forwarda A DI AD: AD, b C ADDS AD Fig.(2) LOIT 4-Draw the waveform for the c:t. shown in fig.(2) but after replaced Di and D3 by thyristors with a 30° and a2 #90°.arrow_forwarda b C ADDS D Fig.(2) L O 5- Draw the waveform for the cct. shown in fig.(2) but after replace the 6-diodes by 6- thyristor.arrow_forward
- The magnetic field component of an EM wave propagating through a nonmagnetic medium (po) is = Determine: H=25 sin (2 x 10't + 6x) a, mA/m (a) The direction of wave propagation. (b) The permittivity of the medium. (c) The electric field intensity.arrow_forwardIn a certain medium with μo, & = H 12e 480 y sin (x x 10% By) a, A/m find: (a) the wave period T, (b) the wavelength A, (c) the electric field E, (d) the phase difference between E and H.arrow_forwardA plane wave propagating through a medium with ɛ, = 8, μ, 2 has E = 0.5 e-3 sin(108tẞz) a, V/m. Determine (a) B (b) The loss tangent (c) Wave impedance (d) Wave velocity (e) H field Answer: (a) 1.374 rad/m, (b) 0.5154, (c) 177.72 /13.63° 2, (d) 7.278 × 107 m/s, (e) 2.817e3sin(108 - Bz - 13.63°)a, mA/m.arrow_forward
- In a nonmagnetic medium, E = 50 cos (10% - 8x) a, + 40 sin (10't - 8x) a, V/m find the dielectric constant &, and the corresponding H.arrow_forwardA uniform plane wave in air with E = 8 cos (wt 4x - 3z) a, V/m is incident on a dielectric slab (z0) with pr = 1.0, 8, = 2.5, σ = 0. Find (a) The polarization of the wave (b) The angle of incidence (c) The reflected E field (d) The transmitted H fieldarrow_forwardA plane wave in a nonmagnetic medium has E = 50 sin (10% + 2z) a, V/m. Find (a) The direction of wave propagation (b) λ, f, and ε, (c) H Answer: (a) along -z direction, (b) 3.142 m, 15.92 MHz, 36, (c) 0.7958 sin(10% + 2z) a A/m.arrow_forward
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