a. Mention the two basic control channels of synchronous generators
b. Which of the two has a much faster response?
c. Explain why are the two control loops are non-interacting?
d. Write down four voltage control equipment used in power system
In: Electrical Engineering
Please prepare a tutorial on what positive definite means from the point of control systems engineering. Provide an example how to calculate and determine this.
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A pool worker of a swimming club was instructed to add a certain chemical to the pool. He went down to the pump room, barefoot. The room was below ground level and was covered with water. He filled up the chemical in a drum of water and switched on a motor to mix them. He contacted the mixing motor with his left hand while switching it on and he was electrocuted. A co-worker heard the scream and tried to move the victim but he also received an electric shock. On investigation, it was found that the earth pin was missing from the power cord. Enumerate the various safety measures to prevent this.
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Copper has 8.5∙1028 free electrons per cubic meter. A 71.0 cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 A of current. (a) How much time does it take for an electron to travel the length of the wire? (b) Repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) More generally, how does changing the diameter of the wire that carries a given amount of current affect the drift velocity of the electrons in the wire?
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Explain in details the relation between phase and line voltages and currents in a starconnected balanced positive sequence three-phase system. Use only one method of analysis.
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Describe how DDoS attacks may be mounted against TCP and UDP services. In what way will being connection-oriented be different for TCP and UDP?
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assuming n=m=1
A 230+m V, series DC motor has a field winding of 35+m turns per pole, Its armature resistance is 0.09+.01*m ohm and field resistance is 0.06+0.01*m ohm. The magnetization curve expressed in terms of magneto motive force verses EA at 850+n rpm is given below by the following table. Rated current is 70+m A. Rotational loss is 50+m Watt. Find Motor’s torque, Speed and output power at 90% of full load armature current.
|
EA
V
|
95
|
150
|
188
|
212
|
229
|
243
|
|
ℒ, A.
turn
|
500
|
1000
|
1500
|
2000
|
2500
|
3000
|
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Can you please type a short summary on what is LTE AND 5G? and their differences?
In: Electrical Engineering
a) A 50kW separately excited DC motor has armature resistance of 2.5W, armature inductance of 30mH and back e.m.f of 100V when the motor is fed from a buck converter with 250VDC input, 50Hz switching frequency and 50% duty cycle. Assuming continuous conduction and lossless converter, find out the maximum, minimum and ripple currents in armature.
b) Determine the values of inductor and filter capacitor for a buck converter with following specifications: Input= 48V, output = 24V, Load curernt = 6A, switching frequency = 20kHz, ripple current = 30%.
In: Electrical Engineering
In: Electrical Engineering
Please write in multisim:
Design 3 bit a synchronous counter to produce the following
sequence: 0, 1, 2, 5, 3 then 0.by
using J-K Filp Flop..
Please i need in multisim and Step of solution.
Thanks!!
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Determine where the system is 1) linear 2) causal 3) stable and 4) time-invariant. a)y(n)= nx(n) b) y(n)=x square(n)
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A 3-phase, 380 V, 50 Hz , 6 pole, Y-connected induction motor has R1 = 0.1 W , X1 = 0.4 W, R2’ = 0.12 W , X2’ = 0.4 W, Xm = 20 W , Pr = 1 kW. The motor is operated at 970 rpm what is the efficiency?
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can i use port mapping inside a process in vhdl coding
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List the Electric equipment used in Testing and Maintenance of Motors. Discuss each equipment.
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