EBK ELECTRIC MOTOR CONTROL
EBK ELECTRIC MOTOR CONTROL
10th Edition
ISBN: 9780100784598
Author: Herman
Publisher: YUZU
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Chapter 50, Problem 2SQ
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Explain the process of energy that is used to brake the motor dynamically for the two described methods.

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12.8 Obtain the inverse Laplace transform of each of the fol- lowing functions by first applying the partial-fraction-expansion method. (a) Fi(s) 6 = (s+2)(s+4) (b) F2(s) = (c) F3(s) = 4 (s+1)(s+2)2 3s3 +36s2+131s+144 s(s+4)(s²+6s+9) 2s²+4s-10 (d) F4(s) = (s+6)(s+2)²
12.4 Determine the Laplace transform of each of the followingfunctions by applying the properties given in the Tables (a) f1(t) = 4te−2t u(t)(b) f2(t) = 10cos(12t +60◦) u(t)*(c) f3(t) = 12e−3(t−4) u(t −4)(d) f4(t) = 30(e−3t +e3t ) u(t)(e) f5(t) = 16e−2t cos4t u(t)(f) f6(t) = 20te−2t sin4t u(t)
8. Obtain the inverse Laplace transform of each of the followingfunctions by first applying the partial-fraction-expansionmethod.(a) F1(s) =6(s+2)(s+4)(b) F2(s) =4(s+1)(s+2)2(c) F3(s) =3s3 +36s2 +131s+144s(s+4)(s2 +6s+9)(d) F4(s) =2s2 +4s−10(s+6)(s+2)2
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