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The stator and rotor of a three-phase, 440-V, 15-hp, 60-Hz, eight-pole, wound-rotor induction motor are both connected in wye and have the following parameters per phase: R1 = 0.5 , R2 = 0.1 , Xl1 = 1.25 , and Xl2 = 0.2 . The magnetizing impedance is 40and the core loss impedance is 360 , both referred to the stator. The ratio of effective stator turns to effective rotor turns is 2.5. The friction andwindage losses total 200 W, and the stray-load loss is estimated as 100 W. Using the equivalent circuit, calculate the following values for a slip of 0.05 when the motor is operated at rated voltage and frequency applied to the stator, with the rotor slip rings short-circuited: stator input current, power factor at the stator terminals, current in the rotor winding, output power, output torque, and ef?ciency.
Figure shows two first-order triangular finite elements used to solve the Laplace equation for electrostatic potential. Find a local S-matrix for each triangle, and a global S-mat
An audio amplifier with feedback needs gain of approximately 500 in a 3-dB bandwidth extending from 60 Hz to 25 kHz. Assume this is accomplished using a feedback network with ß=0.0
#quesFind a minimum two level, multiple-output AND-OR gate circuit to realize these functions (eight gates minimum). F1(a,b,c,d) =Sm(10,11,12,15) +D (4,8,14) F2(a,b,c,d) =Sm(4,11
Q. Can you explain Binary Number Systems? The Binary numbers are used to represent digital information because like most digital systems, binary numbers have only two possible
Mainframes Computers larger than minicomputer more power operating at very high speed called mainframes. They can processes 64 bit data. Such computers are used in defe
Q. When the J and K inputs of a JKFF are tied to logic 1, this device is known as a divide-by-2 counter. Complete the timing diagram shown in Figure for this counter.
Q. An n-channel JFET having V P = 3.5 V and I DSS = 5 mA is biased by the circuit of Figure with V DD = 28 V, RS = 3000 , and R 2 = 100 k. If the operating point is given by
counter
Synchronization: Whatever type of weep is used, it must be synchronized with the signal being measured. Synchronization has to be done to obtain a stationary pattern. This requir
For the circuit in figure, find the current through each resistor.
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