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A three-phase, 50-hp, 440-V, 60-Hz, four-pole, wound-rotor inductionmotor operates at a slip of 0.03 at full load,with its slip rings short-circuited. The motor is capable of developing a maximum torque of two times the full-load torque at rated voltage and frequency. The rotor resistance per phase referred to the stator is 0.1 . Neglect the stator resistance and rotational and stray-load losses. Find the rotor copper loss at full load and the speed atmaximumtorque.Compute the value of the per-phase rotor resistance (referred to the stator) that must be added in series to produce a starting torque equal to the maximum torque.
commutator in d.c machine acts as... what????
Explain the term half duplex transmission. A half duplex channel can receive and send, but not at similar time. It's as a one-lane bridge where two-way traffic should give way
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Design : Rather than 100 two-motion selectors as in the case of Design 3, let's consider only 24 two-motion selectors. In the case 24 simultaneous calls can be put through the swi
design a clipper circuit of a sinsoiudial wave of a peak value 25v&minimum value of -12v to make the output voltages of 20&-9v respectively.
Q. If b and a are the radii of the outer and inner conductors, respectively, of a coaxial cable using a polyethylene dielectric (ε r = 2.26), what ratio b/a is needed for the cabl
A former employs a servant to look after his form house. He instructs the servant to keep a watch on his goat. So that he does not harm the kitchen garden, when the entrance-door
Explain MMX Technology. Multimedia extensions technology adds 57 newly instructions to the instruction set of the Pentium - 4 microprocessors. The Multimedia extensions techno
A step-down transformer has primary turns Np = 100; secondary turns Ns = 10; primary winding resistanceRp = 100 ?; secondary winding resistance Rs = 2 ?. Assume that there is no l
In this case, 24 simultaneous calls can be put through switch. Generally a 24-outlet Uni-selector is used as a selector hunter. Every one of the 24 outlets is connected to one two-
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