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A 3-phase induction motor has a 4-pole, star-connected stator winding and runs on 50 Hz with 400 V between lines. The rotor resistance and standstill reactance per phase are 0.4 Ω and 3.6 Ω respectively. The effective ratio of rotor to stator turns is 0.67. Calculate (a) the gross torque at 4% slip;
(b) the gross mechanical power at 4% slip;
(c) maximum torque,
(d) speed at maximum torque; and
(e) maximum mechanical power output (gross). Neglect stator impedance.
Write the differential equation model of this system and determine conditions on the length n of the cascade for which the system admits a stable limit cycle. Validate your findings through simulation.
Fourier transform X(w)=Xreal(w)+j(Xi(w)). Determine and represent the signal y(w) that gives the fourier transform of Y(w)=Xi(w)+Xreal(w)e^exp(j2w).
determine the maximum rms voltage, the resonant frequency, the half-power frequencies, and the bandwidth. Use the results to determine the quality factor of the circuit.
A random sample of 40 engineers in the firm showed that, for a particular week, they averaged 44 hours of work with a standard deviation of 3 hours. Are the prospective employees being told the truth?
The switch has been closed for a long time. When the switch is opened, an arc appears across the switch contacts. Explain why. Assuming an ideal switch and inductor, what voltage appears across the inductor when the switch is opened? What could ha..
use nodal analysis to find io in the network given below. identify and label each node otherwise you will lose your
Signal generator‘s internal impedance is purely resistive andhas an open-circuit voltage of 3.5 V. When the generator is loaded with 22 ohms of resistance, its terminalvoltage drops to 2.8 V. What is the generator's output impedance (pure resistanc..
Determine the output voltage of an op-amp for input voltages of Vi1 = 150 µV, Vi2 = 140 µV. - Calculate the cutoff frequency of a first-order low-pass filter for R1 = 1.2 KΩ and C1= 0.02 µF.
For much of the last century, the annual growth rate of energy utilization in the world was 3.5% per year. At present, the rate of global energy usage is approximately 15 TW. When considering only coal, oil, and gas.
suppose that 3 j of work is needed to stretch a spring from its natural length of 26 cm to a length of 42 cm. a how
the nature of resistance and expalin why the resistances are not exactly what the color code says it is. Also, explain what effect a resistance has on the voltage of a circuit, as well as the current.
Two identical particles each with charge q are placed on the x axis. One at the origin and the other at x=5cm. A third particle with charge -q is placed on the x axis so the PE of the three particle system is the same as the PE at infinite separat..
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