A 3-phase, 3300 V, star-connected, synchronous motor has an effective resistance and synchronous reactance of (2 and 18) N respectively. If the open circuit generated emf is 3800 V between lines, calculate:. a)- the maximum total mechanical power that the motor can develop and

A 3-phase, 3300 V, star-connected, synchronous motor has an effective resistance and synchronous reactance of (2 and 18) N respectively. If the open circuit generated emf is 3800 V between lines, calculate:. a)- the maximum total mechanical power that the motor can develop and

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 12.12P

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Concept explainers

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.

Question

Home Work 16:
A 3-phase, 3300 V, star-connected, synchronous
motor has an effective resistance and synchronous
reactance of (2 and 18) N respectively. If the open circuit
generated emf is 3800 V between lines, calculate:.
a)- the maximum total mechanical power that the motor
can develop and
b)- the current and p.f. at maximum mechanical power.

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