20 Ω 60 Ω 18 Ω 50 Ω 40 Ωξ 60 Ω 75 04 12 Ω 20 Ω 30 Ω
Synchronous Generator
In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.
Salient Pole Rotor
Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.
a) Calculate the equivalent resistance seen
by the source
b)Calculate the power delivered by the source.
The power delivered by a current source into a resistive circuit is given by:
Where,
The current supplied by the current source is “IS”,
The resistance seen by the current source is “Req”.
In the circuit shown in the question, 12Ω resistor is in series with 18Ω resistor and the series combination is in parallel with 60Ω resistor. The combination of 12Ω resistor, 18Ω resistor and 60Ω resistor is in series with 30Ω resistor and the combination of 12Ω resistor, 18Ω resistor, 60Ω resistor and 30Ω resistor is in parallel with 75Ω resistor. The upper 20Ω resistor is parallel with 60Ω resistor.
The resistance of the combination of 12Ω resistor, 18Ω resistor, 60Ω resistor, 30Ω resistor and 75Ω resistor (R1) and resistance of combination of upper 20Ω resistor and 60Ω resistor (R2) are given by:
Step by step
Solved in 2 steps with 5 images
