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An 1100 V. 50 Hz star connected induction motor has a starconnected slip-rings rotor with a transformation ratio of 3.0. Therotor resistance per phase is 0.015 ohm and leakage inductance is0.8 mH per phase . Neglect stator impedence .Find(a) The rotor starting current per phase with slip ringsshort-circuited.(b) The rotor power factor at starting .(c) The external resistance per phase to obtain a startingcurrent of 120 A. in the stator.(d) The rotor current at 4% slip.(e) The rotor power factor at 4% slip.
John's house is served electrically by a single phase transformer rated 15 kVA, 8160 / 220 V, 60 Hz. The leakage reactance of the transformer is 400 ohms referred to the high side. John wants to replicate an interesting EEE 360 experiment
A twelve pole, 480V, 60Hz synchronous motor has a reactance of 5 ohm. The field current is adjusted so that the equivalent field voltage Ef is 520V (line-to-line). Calculate the following: (a) Maximum torque. (b) Power factor at the maximum torque..
All the script needs to do is make a two 10 by 10 grids, one for the user, one for the computer. Allow the user to choose where to place their ships, and in which direction. Then have the computer randomly place its ships.
Three loads are connected in parallel across a single-phase source voltage of 240 V (RMS). Load 1 absorbs 12 kW and 6.667 kVAR; Load 2 absorbs 4 kVA at 0.96PF leading; Load 3 absorbs 15 kW at unity power factor.
A museum has three rooms, each with a motion sensor (m0, m1, m2) that outputs 1 when motion is detected. At night, the only person in the museum is one security guard who walks from room to room.
A transducer produces a sinusoidal waveform with an amplitude of 2.5 VPK and a DC offset of 0 VDC. The ADC input signal range is 0 V to 5 V. Describe the signal conditioning circuit that is needed to use the full-scale range of the ADC.
If the polarization state resulting from (a) is represented bya complex number on the complex plane, show that the locus of these points as ψ variesfrom 0 to π/2 is a branch of hyperbola. Obtain the equation of the hyperbola.
A balanced positive-sequence wye-connected 60-Hz three-phase source has line-to-line voltages of VL = 208V rms. This source is connected to a balanced wye-connected load. Each phase of the load consists of an impedance of 30 + j40 *
Fnd the attenuation provided at ω=2ωp by aseventh-order Chebyshev filter with a 0.5dB passband ripple. If the passband ripple is allowed in to increase to 1dB, how much does the stop band attenuation increase.
(b) Verify that there are 4.994×(10 to the power 22) atoms per cubic centimeter in the Si lattice at room temperature. (c) Determine the center to center distance between nearest neighbours in the Si lattice.
constructed using standard value resistors a. Without making a single calculation, which resistive element will have the most voltage across it Which will have the least b. Which resistor will have the most impact on the total resistance.
A four-bit binary number is represented as A3A2A1A0, where A3, A2, A1, and A0 represent the individual bits and A0 is equal to the LSB. Design a logic circuit that will produce HIGH output whenever the binary number is greater than 0010 and less t..
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