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A 75-kW, 460-V, three-phase, four-pole, 60-Hz, wound-rotor induction motor develops a maximum internal torque of 225 percent at a slip of 16 percent when operated at rated voltage and frequency with its rotor short-circuited directly at the slip rings. Stator resistance and rotational losses may be neglected, and the rotor resistance and inductance may be assumed to be constant, independent of rotor frequency. Determine
a. The slip at full load in percent.
b. The rotor I2R loss at full load in watts.
c. The starting torque at rated voltage and frequency in per unit and in N · m. If the rotor resistance is doubled (by inserting external series resistance at the slip rings) and the motor load is adjusted for such that the line current is equal to the value corresponding to rated load with no external resistance, determine
d. The corresponding slip in percent and
e. The torque in N · m.
a series parallel circuit with a 3V dc power source connected to 3 resistors. R1 and R2 are in series with the voltage source and R3 is in parallel with R2. It is given that 4amps is flowing through R1 and 2amps is flowing through R2.
Box 1 contains 5 red, 6 white, and 9 blue balls. Box 2 contains 7 red, 8 white, and 4 blue balls. A ball is withdrawn at random from Box 1 and placed in Box 2. Then, a ball is taken at random from Box 2.
A short- dipole antenna is placed at the origin while another short-dipole antenna is located at a point given in sphericalcoordinates as P (1000,π/4,π/4). Both Antennas arealigned parallel with the Z-axis .
Consider the interval [0,30]: y[n+2] - 0.6y[n+1] - 0.16y[n] = 5x[n+2]. a.) Find zero-state response if the input is x[n]= 4^(-n)u[n] b.) Find zero-state response if the input is x[n]= cos(2npi/6)u[n]
A differential equation of a system with x(t) as an input and y(t) as an output is defined as a.)Find the system response to unit step function, x(t)= u(t), where b.) Specify the Zero Input Response.
Design a circuit that has a low pass transfer function with a3dB band edge at 30Hz. you may use capacitors, inductors, and bothdependant and indepandant sources.
In terms of good desgn practice , what is the number of receptacles allowed on a general purpose 15 A 120V circuit. A 20A and 120V circuit. What are the requirements for the circuit supplying bathroom in residences
design the sign extension component of an I-Format Data Path Unit, where a 16 bit number will be extended to a 32-bit number, while mainintaing the sign (signed numbers use 2s complement).
A certain voltage is + 14.7 V for 24.8 ms and -14.7 V for the succeeding 24.8 ms and continues oscillating back and forth between these two values at 49.6 ms intervals. The voltage is present across a 64 resistor.
what is the range of numbers that can the represented by a 4-bit two's complement representation A 5-bit representation A 16 -bit representation
An infinite sheet of surface current density given by (equation 1) A/m exists on a plane defined by x=1. A second infinite sheet of surface current density given by (equation 2) is on the plane defined by x = -2. What is the magnetic field intensi..
If you had the 6V supply set toits full voltage and set so that the maximum supply current is 5A,use Ohm's law to fill in the following two blanks: a. If a 1kOhm resistor wereconnected across the 6V supply's terminals
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