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A three-phase induction motor has been tested, and has small stator resistance. At 230 V, 60 Hz, the motor produces 40 N-m at 1740 RPM.
a) Given a 40 N-m load, input of 115 V and 30 Hz, what operating speed do you expect?
b) This machine is operated as a variable-speed generator. The external drive imposes 20 N-m on the shaft. The speed is 2400 RPM. Determine the appropriate operating frequency and voltage. What if the speed is 1880 RPM?
In the electronics business, mark-up is in the order of 100% to 130% at each level of middleman. Let's say that it is 100%. Let's further say that your product passes through three levels of middleman, that your product is produced in accordance
Power Electronics: A Single-Phase Bridge Rectifier, A single-phase bridge rectifier has a purely resistive load R=10 Ohms, the peak supply voltage Vm=170 V
Assume the average energy density of sunlight to be 800 w/m^2 ---and the overall photovolatic system efficiency to be 10 percent. Calculate the land area covered with photovolatic cells needed to produce 1000 Mw , the size of a typical large centr..
Explain the function of the HMI in a SCADA system.
A certain transducer is modeled with a source Vs and series resistance Rs. The voltage at its terminals is measured with a DVM having internal resistance Ri = 100 Mega ohms and is found to be 12.5 mV; adding a 5 Mega Ohms resistance in parallel
if a balanced, three-phase, 15MW total load is fed by a 138Kv power line at a 0.85 lagging power factor, determine the following. (a) The line current (b) The value of the capacitor in uf per phase, is a wye-connected capacitor bank is used to cor..
A 60-Hz source supplies power to an industrial load through a transmission line of impedance (0.2+ j0.1) ohms. The load consumes 130 kW of power at line voltage VL= 440
In a certain communications system a resonant-tuned circuit (tuned at 1200 kHz with Bandwidth = 15 kHz) is connected to the output of a non-linear amplifier (mixer). Find the frequency components at the output of the resonant-tuned circuit
Given a circuit with 10 resistors, a CCVS gix, two independent voltage sources v1 and v2, as well as an independent current source i1. What would be the general form of a voltaqe v across a specific resistor R
Store the arrival times in memory locations starting from $1000.(Do this is in C. Store the results in an array and don't worry about the speci c location of the results.)
A 345-kV, 3-phase transmission line delivers 100 MVA, 0.866 lagging, to a wye connected load. Calculate the following: a. The total real and reactive power delivered to the load. b. The real and reactive power per phase.
Earth-based 802.11a or 802.11g wireless LAN standards transmit data using a bandwidth of 16.56 MHz. What is the theoretical thermal noise level (in V) in an ideal receiver operating with an input impedance of 50 ohms
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