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An induction motor has thefollowing specifications: a 8-pole squirrel cage rotor, operates at25 hp off of a 220 V line-to-line 3-phase service, 60 Hz, 64 amps of line current, and under full load runs at 830 RPM. The motordraws 20.8 kW at full load.(i) Calculate the slip.
(ii) Determine the percent speed regulation if the no-load speed is895 RPM.
(iii) Determine the power factor of the induction motor.
(iv) Determine the motor torque in ft-pounds.
(v) Determine the percent power efficiency of this induction motor.
Draw energy band diagrams, for k lying between 0 and pi/a (take a=5Ã), for a material whose valence band follows the equation. and calculate the effective masses for conduction and valence bands.
A certain sine wave has a frequecny of 2.2kHz and an rms value of 25 V. Assuming a given cycle begins (zero crossing) at t=o s, what is the change in voltage from 0.12 ms to 0.20 ms
A 100 hp, 16 pole, 460V, three phase, 60hz induction motor has a slip of 2.4 percent when running at rated conditions. Determine (a) synchronous speed; (b) rotor speed (c) rotor frequency.
In a unity feedback system, the forward path has a transfer function of the form G(s) = k/(1+s/ωp), and the feedback path has a gain of kfp which is less than unity. Calculate the bandwidth of the closed-loop transfer function.
A series RLC circuit connected to a 100-V 60-Hz source draws a current of 2.5 A. The measured power factor for the circuit is 0.7 leading, and the inductive reactive power is 300VAr. Calculate the resistance, inductance and capacitance.
What is the pressure on a load cell that can operate up to a maximum pressure of 500 pounds if its output is 15mV based on a scale factor of 5mV/v of inpur, and the input voltage is 10V.
How to write and application note that explains the use of AA sized rechatgeable batteries as a replacement for non-rechargeable alkaline barreries in a digital camera
a 20 mH inductor with an internal resistance of 20 ohms is connected in series with a capacitor and a voltage source with a thevenin resistance of 60 ohms. a. what value of C will be needed to produce Wo = 6 krad/s
An AISI 4140 OQT 1000 sleeve is to be secured to a 2.50-inch diameter solid rod ot the same material employing a class FN1 force fit. The outside diameter of the sleeve is 5.00 inches.
A standard test for the operation of an FM system is to examine the output spectrum when modulated by a standard test tone. You're examining an FM broadcast tx modded by a 1kHz tone.
Design a timer system that has a push button, LCD and RTI. When you press the push button, the timer starts counting each second and displays the seconds' value on the LCD. When you press the timer, the system stops counting.
A 50 kW load operates from a 60 Hz 10 kV rms line with a power factor of 60% lagging. Determine the capacitance that must be placed in parallel with the load to achieve a 90% lagging power factor.
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