What are the active components of three-phase Induction Motor?b) Derive an expression for the frequency in the rotor circuit of three-phase IM?c) Draw with details the approximate per phase equivalent circuit of three-phase IM?d) Why the iron loss in rotor of an induction motor is negligible?

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Answered: What are the active components of…

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter12: Power System Controls

Section: Chapter Questions

Problem 12.4P

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. When a self-excited compound DC generator supplies load, the terminal voltage is not the same as the generated emE Why? a) voltage drop across the armature resistance will reduce the voltage available at the load terminals b) where there is a series field, voltage drop across the series field resistance will reduce the voltage available at the load terminals c) both "a" and "b" d) neither "a" nor "b"
A 6 pole wave wound d.c. shunt generator has 500 conductors. A generator delivers 50 kW of power at 250 voltage at full load. The resistance of the field circuit is 125 2. Actual brush shift is 10°. Then find the demagnetizing and cross magnetizing ampere turns per pole and how many additional turns must be wound on each pole to eliminate the demagnetizing effect.
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T-a. The direction of rotation of a single-phase split-phase motor can be change by........ a) reversing the connection of the start winding b) reversing the connection of the run winding c) reversing the connection of the start and run winding at the same time d) "a" or "b", not "c" T-b. Single-phase split-phase motors using an electrolytic capacitor in the start winding circuit should not be cycled more than about__________ time per hour. a) 8 b) 12 c) 24 d) none of the above T-c. When replacing the capacitor in a capacitor-start induction-run motor, one must be sure to replace the bad capacitor with__________ . a) a smaller one b) one of the same size c) a larger one d) none of the above
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DC generators
Can you please answer Problem 49 to 51.
A 220 V , 60 Hz , supply is connected to 200 – turn armature winding of reluctance 1.7x105 At / Wb . Find : the magnetizing reactance the rms values of the ( magneto – motive force , exciting and armature currents , magnetic fluxflu the inductance Draw the phasor diagram of the circuit
A 3-phase, 50-Hz induction motor with its rotor star-connected gives 500 V (r.m.s.) at standstill between the slip-rings on open-circuit. Calculate the current and power factor at standstill when the rotor winding is joined to a star-connected external circuit, each phase of which has a resistance of 10 Q and an inductance of 0.04 H. The resistance per phase of the rotor winding is 0.2 N and its inductance is 0.04 H. 4. Also, calculate the current and power factor when the slip-rings are short-circuited and the motor is running with a slip of 5 per cent. Assume the flux to remain constant. Identify it`s given and solve it

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What are the active components of three-phase Induction Motor? b) Derive an expression for the frequency in the rotor circuit of three-phase IM? c) Draw with details the approximate per phase equivalent circuit of three-phase IM? d) Why the iron loss in rotor of an induction motor is negligible?