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a salient pole 60 Hz synchronous motor with a squirrel cage winding on the rotor which is used for starting purposes.(a) What is the frequency of the current in the squirrel cage rotor conductors immediately after the motor is energized? (The motor was initially at standstill.)(b) What is the frequency of the current in the squirrel cage rotor conductors after the field is energizedand the machine is operating at steady state?(c) Assume the machine is initially at steady state operating at rated voltage and unloaded, when a three-phase short circuit occurs on the terminals of the machine. If you could monitor the current in the squirrel cage conductors, what would you expect to see? Explain.(d) The equal area criteria to determine if a synchronous machine will remain "stable" after a disturbance is essentially an application of the principle of conservation of energy. Very briefly describe how this process can be used to describe the response of the machine to a particular transient.
Are these signals periodic, find their fundamental period T and their fundamental frequency, otherwise prove that they are non-periodic x(t)= 4 cos(12 t+400) + sin(16 t) x(t)=cos4t +3e-j12t x(t)= ej(10t+p/3) x(t)= ejt +ej3t +sin(6t)
In the movement of a robot arm, the arm is commanded to go from position 1 to position 5. Discuss the rise time, the overshoot, the settling time, and the steady-state error as it applies to the movement of a robot arm
Given an 24 MHz bus speed. Write down the line(s) of instruction which set the ATD1 unit for 2MHz conversion frequency, 10-bit resolution and 8 A-to-D clocks per sample time.
a thermocouple is a heat-sensing device that typically outputs a signal in microvolts, such as 10 microvolts.if the signal transmitted to the controller needed to be 10 volts, what approximate amplification would the transmitter need to supply
The microprocessor then reads the 8-bit data from the dip switch and puts the value in memory starting at location called ‘BUFFER' . This same data is sent to a digital-to-analog converter ( D/A) whose output drives a dc motor.
Describe a passive fourth-order Butterworth filter with cutoff frequency of 2000 radians per second and an output resistor of 1000 ohms.
A spectrum analyzer is used to verify an FM signal with a carrier frequency of 100.3 MHz, a modulation frequency of 15 kHz, and a modulation index of 2.4. a.) Predict the spectrum-analyzer display for the signal
CDMA is a multiple access technique to allow multiple users to share the same bandwidth, based on the orthogonality of their spreading codes. CDMA is a descendent of the direct sequence spread spectrum (DSSS) technology designed for antijam (AJ).
Use a modulation index of 50 percent and a sampling rate of 160 kHz. In this project, develop a coherent demodulation for the modulated signal. Assume there is no channel error.
A generator uses a coil that has 110 turns and a 0.475 T magnetic field. The frequency of this generator is 43.0 Hz, and its emf has an rms value of 230 V. Assuming that each turn of the coil is a square (an approximation), determine the length of..
Digitizing an Audio Signal, PAM, ADC, An audio signal has a bandwidth that extends from 100 Hz to 10 kHz. The signal is sampled to create a PAM signal and then digitized by an analog to digital converter (ADC) that has 8 bits.
A load consisting of a 480 ohm resistor in parallel with a (5/9) uF capacitor is connected across the terminals of a sinusoidal voltage source, vg, where vg=240cos5000t V. a) What is the peak value of the instantaneous power delivered by the source
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