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A three-phase, wye-connected, 400-V, four-pole, 60-Hz induction motor has primary leakage impedance of (1+j2) ohms and secondary leakage impedance referred to the primary at standstill of (1+j2) ohms. The magnetizing impedance is j40ohms and the core-loss impedance is 400 ohms. Using the T-equivalent circuit.
Calculate the input current and power (i) on the no-load test (S~0) at rated voltage,and (ii) on blocked-rotor test(S=1) at rated voltage.
An LVDT with associated signal conditioning will be used to measure work-piece motion from -20 to +20 cm. The static transfer function is 2.5 mV/mm. The output will be interfaced to a computer via an ADC.
A switch-mode dc-dc converter is operating at a switching frequency of 20kHz, and Vd=150V. The average current being drawn by the dc motor is 8.0 A. In the equivalent circuit of the dc motor, Ea=100V, Ra=0.25 ohm, and La=4mH.
The transformer is supplying a load of 325 MVA, with 0.93 power factor lagging at a voltage of 24 kV (line-to-line) on its low-voltage side. It is supplied from a feeder whose impedance is 0.11 + j2.2 ohms connected
Consider a 500-gallon tank that needs to be filled when the level goes below 25 gallons and will stop when the level goes above 475 gallonsControl systems can be either open-loop or closed-loop
A 60-Hz, single-phase transmission line has a length of 80 miles. Its shunt conductance (G) is 3.4×10?11 S/mile, resistance (R) is 0.1 ?/mile, capacitance (C) is 16 pF/mile, and inductance (L) is 0.56 mH/mile 220 kV, 220 MVA with power factor
Discuss the flat and segmented memory models and provide an example
what is the conversion efficiency of an amplifier in which the effective value of the current through a 2.2k ohms load is 5 mA and the drain on the 18-V dc supply is 3.8mA. What will happen to the output AC signal if the DC level is insufficient
Assuming exact valued resistors what output voltage (measure to ground) and equivalent output resistance result if the resistor used are not ideal but have a +-5% manufacturing tolerance what are the extreme output voltafes and resistances that ca..
(a) Assume that the mobility of a carrier at T = 300K is u = 925 cm^2/V-s. Calculate the carrier diffusion coefficient. (b) Assume that the diffusion coefficient of a carrier at T = 300 K is D = 28.3 cm^2/s. Calculate the carrier mobility.
build a circuit for a parking deck where a binary counter counts up when a car comes in and down when one leaves. There can only be a maximum of 40 cars in the parking deck before an LED turns on to notify the parking deck is full.
A pulse is used to measure the frequency response of a system. Since we expect the frequency response to extend to 20 kHz, select a pulse whose magnitude spectrum is constant within 1% out to 20 kHz.
Due to its wider bandgap than silicon, a GaAs red light emitting diode (LED) typically has a turn-on voltage of 1.6 V. Assuming the maximum allowable current through the LED is 16.7 mA,
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