A 50 Hz, 2 pole turbo generator rated 100 MVA, 33 kV has an inertia constant of 4 MJ/MVA. If the mechanical input is suddenly raised to 70 MW for an electrical load of 40 MW, then the rotor acceleration is

Q: QUESTION 9 The rotor power output of a 3-phase induction motor is 30 KW and corresponding slip is…

A: Given data, 3-phase induction motor Rotor power output Psh=30 kW Slip s=4%=0.04

Q: The power input to a 3-phase induction motor is 60 kW. Total stator losses are 1000 W, the %…

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Q: Under equilibrium condition in a power system, the difference between rotor angle between any two…

A: Rotor angle defines the stability of interconnected synchronous machines so that they do not lose…

Q: A 50-Hz round rotor generator has Ef = 1.4 pu, VT = 1.0 pu, Xd = 1.5 pu, and H = 7 sec. Determine…

A: Given values are -

Q: A20 The speed at which the magnetic field of a 3-phase induction motor rotates is called the

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Q: A 3-phase induction motor that is star-connected and has a supply line voltage E0 of 400V at 50Hz.…

A: You have asked multiple independent questions. We are authorized to answer one question at a time.…

Q: In a three-phase induction motor the maximum torque occurs at 20% slip and the equivalent resistance…

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Q: A 100 MVA, four-pole, 60 Hz generator has a moment of inertia 25 X 103  Kg-m2 . The angular momentum…

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Synchronous Motor

The synchronous motor is an AC electric type motor where at a steady-state the shaft rotation is synchronized with the supply current variable-frequency. To an integral number of AC cycles, the rotation period is exactly equal. The stator of the motor in the synchronous motor contains multi-phase AC electromagnets due to which a magnetic field is created that rotates in time with the oscillation of the line current. The rotor contains a permanent magnet and the rotor rotates in synchronization with the stator field at the same rate and provides the second synchronized magnetic field which is rotating in nature as a result. When the synchronous motor is supplied with independently excited multi-phase AC electromagnets on both the rotor and the stator, it is termed as a doubly-fed machine. The most widely used AC-type motors are the synchronous AC motor and the induction AC motors.