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A DC machine has the following parameters: Ra =1Ω, La = 4 mH , kPWM = 100 .(a) Design the current loop with a bandwidth of 1000 rad/s and phase margin of 900.(b)Given a step current command, ia*(t) = 5u(t)A, calculate the actual current,i(t)
A 10 cm length of a K-band copper waveguide is filled with a dielectric material with er = 2.55 and tan f = 0.0015. If the operating frequency is 15 GHz, find the total loss through the guide and the phase delay from the input to the output of th..
Determine the expression for the frequency response H(Omega) of a causal IIR LTI discrete-time system characterized by the input-output relation. where |a|
Many hallway and some room lights are wired so that they may be controlled from either end of the hall or room. This is called a two-way or three-way switch (references vary). Explain why this is equivalent in operation to an XOR gate.
Give a brief explanation of the concept of a priority encoder. Using this, what would be the binary output for a 10-input priority encoder when inputs 7 and 5 are activated What is the binary output (active-high) Active-low
Construction of different types of power transformer, significant energy savings
Scientists have proposed using the radiation pressure of sunlight for travel to other planets in the Solar System. If the intensity of the electromagnetic radiation produced by the Sun is about 1.4 kW/m2 near the Earth
if the user enters an invalid response (i.e.- anything other than ‘y', ‘Y', ‘n', or ‘N') the program should print an appropriate admonishment and repeat the question. Do not continue with the program or exit until the user enters an acceptable val..
An AAC is composed of 37 strands, each having a diameter of 0.333cm. Calculate the DC resistance in ohms per km at 75oC. Assume that the increase in resistance due to spiralling is 2%.
find the one-way propagation delay for a 10 meter length. Find the two-way propagation delay. (The two-way delay is the time it takes for the wave to travel from the source to the load and back to the source, like in a radar)
A 1.1 mF capacitor has initial voltage of 12 V.The energy stored in the capacitor is used to light up a 0.7 KOhm lamp.Assuming that the lamp is completely dimmed when the current through it is less than 0.2 mA, for how long can the capacitor susta..
A VSWR is measured along a transmission line to be 2. Find two values for the reflection coefficient ? Which of these values will correspond to ZL Zc
Calculate and plot the required current and the resulting voltage Va that should be applied to the armature terminals of the machine. As intermediate steps, calculate and plot Ea, the required electromagnetic torque Tem from the motor, and the cur..
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