The 400 volts, 20 kva synchronous motor has a d-c power input to the field of6.5 of the rated a-c input. Calculate the exciting direct current of the field at 200 volts? The 400 volts, 20 kva synchronous motor has a d-c power input to the field of6.5% of the rated a-c imput. Calculate the exciting direct current of the field at200 volts?

Given - The rating of the synchronous motor as 20 kVA and the voltage as 400 volts, DC power input…

Answered: The 400 volts, 20 kva synchronous motor…

The 400 volts, 20 kva synchronous motor has a d-c power input to the field of 6.5 of the rated a-c input. Calculate the exciting direct current of the field at 200 volts?

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter33: Single-phase Motors

Section: Chapter Questions

Problem 29RQ: What is the synchronous speed of an eight-pole stepping motor when connected to a twophase, 60-Hz AC...

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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.

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The 400 volts, 20 kva synchronous motor has a d-c power input to the field of

6.5 of the rated a-c input. Calculate the exciting direct current of the field at 200 volts?

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