EBK ELECTRIC MOTOR CONTROL
10th Edition
ISBN: 9780100784598
Author: Herman
Publisher: YUZU
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Chapter 11, Problem 2SQ
To determine
Explain the reason for not starting of sump pump motor when the lower float switch is closed in Figure 11-5 in the textbook.
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12.12 In the circuit of Fig. P12.12(a), is(t) is given by the
waveform shown in Fig. P12.12(b). Determine iL (t) for t≥ 0,
given that R₁ = R₂ = 2 2 and L = 4 H.
is()
R₁
R2:
(a) Circuit
is(t)
8A-
8e-21
elle
(b) is(t)
Figure P12.12 Circuit and waveform for Problem 12.12.
iL
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)
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