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A 480-V, 60 Hz, six-pole synchronous motor draws 80 A from the line at unity power factor and full load.
Assuming that the motor is lossless, answer the following questions:
(a) What is the output torque of this motor? Express the answer both in newton-meters and in pound- feet.
(b) What must be done to change the power factor to 0.8 leading? Explain your answer, using phasor diagrams.
(c) What will the magnitude of the line current be if the power factor is adjusted to 0.8 leading?
Use computer graphics/ or by hand to illustrate 6-pole stator winding of an AC machine. For wt = 0 and wt = 180o show the phasor diagram of phase currents, polarity of currents in individual conductors, and the flux paths.
While both triangular and sawtooth waveforms work in a PWM modulator, it does affect the phase of the PWM output and being able to control this can be useful. Consider your resistor and capacitor choices for the 555 timer circuit.
There are three different beams and they asked us to choose which beam would you use to build an object that incurs high stress. Should I choose the beam with the lowest deflection or with the highest deflection
if we use CD quality audio, i.e. the same sampling rate and number of bits per sample for each channel, how many binary Giga Byte (GB) storage space do we need for the audio portion of an one and a half hour movie
afigure q1.1 illustrates a three-phase power system in which an ideal three-phase ac generator with an abc phase
A 3.3V, 30 A dc power supply is to be designed with a ripple of less than 2.5%. Assume that a half-wave rectifier circuit (60 Hz) with a capacitor filter is used.
An intergrated circuit temperature probe is rated at 0-10 volts dc over a 0-175 degrees Celsius range. What is the temperture when the output voltage is 3.65 volts dc
A particular inverting amplifier with nominal gain of -100 V/V uses an imperfect op amp in conjunction with 100-k ohm and 10-M ohm resistors. The output voltage is found to be +9.31 V when measured with the input open and +9.09 V with the input gro..
a) Design the doubler circuit shown in Figure 2, for which:D = d8 d4 d2 d1 and B = b8 b4 b2 b1 are each an 8421 BCD code digit. The circuit must implement the equation: 10C* + B = 2D + C
a power source is giving 12 V to a circuit. In the circuit there is a resistor. Therefore, would the voltage drop 12 V when the charge moves across the resistor making there 0 V in the circuit after the resistor.
A nonconducting sphere has radius R=2.31cm and uniformly distributed charge q = +3.50fC. Take the electric potential at the sphere's center to be Vo = 0.
Surface integral for jet engine. The air-gas exhaust velocity from a jet engine varies linearly from a maximum of 300 m/s at the center of the circular exhaust opening to zero at the edges. If the exhaust diameter is 1.6 m, find thq exhaust flow.
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