A three phase star connected motor, connected across a 3-phase star connected supply of 400V50HZ takes a current of 20A at 0.8 power factor lagging. Determine the capacitance of thecapacitors per phase that are to be connected in delta across the terminals of the motor to raisethe power factor to unity.

In this question we will find capacitance per phase to improve power factor of motor....

A three phase star connected motor, connected across a 3-phase star connected supply o 50HZ takes a current of 2OA at 0.8 power factor lagging. Determine the capacitance capacitors per phase that are to be connected in delta across the terminals of the motor the power factor to unity.

A three phase star connected motor, connected across a 3-phase star connected supply o 50HZ takes a current of 2OA at 0.8 power factor lagging. Determine the capacitance capacitors per phase that are to be connected in delta across the terminals of the motor the power factor to unity.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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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

A three phase star connected motor, connected across a 3-phase star connected supply of 400V
50HZ takes a current of 20A at 0.8 power factor lagging. Determine the capacitance of the
capacitors per phase that are to be connected in delta across the terminals of the motor to raise
the power factor to unity.

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