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Consider a multi-stack, multiphase variable-reluctance stepping motor, such as that shown schematically in Figure, with 14 poles on each of the rotor and stator stacks and three stacks with one phase winding per stack. The motor is built such that the stator poles of each stack are aligned.
a. Calculate the angular displacement between the rotor stacks.
b. Determine the frequency of phase currents required to achieve a rotor speed of900r/min.
A Gaussian random process having a mean value of 2 and a variance of 4 is passed through an ideal half-wave rectifier. a) Let Xp (t) represent the random process at the output of the half-wave rectifier
Derive the equations of motion of the system - Create a Simulink model using the differential equations
A 3-phase, 440VAC, 6-pole, 60Hz, wye connected induction motor takes 30KVA at .8 power factor lagging, and runs at a slip of 3.5% at full load. The stator copper losses are 500W, and the rotational losses are 350W.
In a certain balanced three-phase system, each line current is 5A and each line voltage is 220 V. What is the approximatereal power, if the power factor is 0.7
Determine the supply voltage E. Find the load resistors RL2 and RL3. Determine the voltage divider resistor R1, R2, and R3.
If the voltage drop across the capacitor is 115 volts and the power taken by the circuit is 922 watts, calculate a) the circuit current, b) the ohmic value of the resistor, c) the line voltage, d) the circuit power factor
A base-station cellular communicationsystem utilizes arrays of f/2 dipoles as transmitting and receiving antennas. Assuming that each element is lossless and that the input power to each of the f/2 dipoles is 1 watt, determine at 1,900 MHz
A three-phase 45 MVA, 345/34.5 kV distribution transformer is used as a step-down transformer. Determine the phase VA, Voltage, Current ratings and turns ratios of the transformer if it is connected as follows (a) Wye -delta
a) Using 5 nF capacitors, design an active broadband first-order bandreject filter with a lower cutoff frequency of 1000 Hz, anupper cutoff frequency of 5000Hz, and a passband gain of 10 dB. Use the prototype filter circuits introduced in the desi..
A sample has a T2 of 50 ms. The net magnetization is rotated into the xy-plane and allowed to decay. how much transverse magnetization will be present 20 ms after being placed in the plane
A strictly convex function is defined as one for which every chord lies above the function. Show that this is equivalent to the condition that the second derivative of the function be positive.
a) What is the total resistance corresponding to 1kohm, 4kohm, 10kohm, 4.7kohm resistors connected in series b) What is the total resistance corresponding to 10ohm, 100ohm, 1kohm, 10kohm resistors connected in parallel
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