Electric Motor Control
10th Edition
ISBN: 9781305177611
Author: Herman
Publisher: Cengage
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Chapter 49, Problem 7SQ
To determine
Explain how the electric brakes are adjusted in general.
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Q6/ (10 Marks)
For the system shown in Fig.3, determine the values of (K) and (a) so that the
maximum overshoot in unit-step response is (50% ) and the peak time is (5)
seconds.
R(s)
C(s)
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G4
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Q1
H2
HI
Fig.1
A1
9 P
P1
Q2
h2'
A₂
3
9 R2
Q3
R(s)
Fig.2
K
S²
C(s)
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Fig.3
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2-2
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Dr. Hassanein Ibraheem
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Answer this question and show me step by step using by Hand not Ai i need ex
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Electric Motor Control
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- A single superconducting coaxial cable could carry a power of 1 GW (the output of a large power plant) at 200 kV, DC, over a distance of 1000 km without loss. An inner wire of radius a = 2.40 cm, made from the superconductor Nb3Sn, carries the current (I) in one direction. A surrounding superconducting cylinder of radius b = 4.54 cm would carry the return current (I). a) In such a system, what is the magnetic field at the surface of the inner conductor (in mT)? b) What is the magnetic field at the inner surface of the outer conductor (in mT). c) How much energy would be stored in the magnetic field in the space between the conductors in a 1000 km superconducting line (in MJ)? d) What is the pressure exerted on the outer conductor due to the current in the inner conductor (in Pa)?arrow_forwardcontrol system find peak time overshoot settling time rise timearrow_forwardA superconducting magnetic energy storage coil is made from a toroidal ring coil (torus). The coil’s cross-sectional radius is d = 1.5 m and radius of the torus is r = 1.5 km. The torus is wound with N = 175,000 turns and is able to carry a current I = 110,000 A. a) Calculate the magnetic flux density in the torus. b) What is the amount of energy stored in the torus? c) If a city requires 500 MW of power how long can this storage ring of this type power the city in case of a blackout in power generation? Assume there are no losses in the conversion of energy from stored DC to AC energy required by standard grids.arrow_forward
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