Synchronous Motor Power CorrectionThe synchronous motor using 150-kilowatt realpower so we have to find these three conditions.Assume1. If synchronous motor operating at 0.85 laggingpower factor then what the value of transmissionline?VL = 480 V100 kWInd.0.78 PFmotorlagging200 kW0.8 PFlagging2. If synchronous motor operating at 0.85 leadingpower factor then the value of current will be?Ind.Infinite busTransmission linemotor3. If the power loss of transmission line is given.Synchr. 150 kWPF=?Pu =312 RLmotorPlantWhat will be effect of these losses on first twoconditions?

The given circuit is: Synchronous motor is using 150 kW real power. Voltage VL=480 V

Synchronous Motor Power Correction The synchronous motor using 150-kilowatt real power so we have to find these three conditions. Assume 1. If synchronous motor operating at 0.85 lagging power factor then what the value of transmission V = 480 V Ind. motor 100 kW 0.78 PF line? lagging 200 kW 0.8 PF lagging 2. If synchronous motor operating at 0.85 leading power factor then the value of current will be? Ind. Infinite bus Transmission line motor 3. If the power loss of transmission line is given. Pu =31R. Synchr. 150 kw motor PF-? Plant What will be effect of these losses on first two conditions?

Synchronous Motor Power Correction The synchronous motor using 150-kilowatt real power so we have to find these three conditions. Assume 1. If synchronous motor operating at 0.85 lagging power factor then what the value of transmission V = 480 V Ind. motor 100 kW 0.78 PF line? lagging 200 kW 0.8 PF lagging 2. If synchronous motor operating at 0.85 leading power factor then the value of current will be? Ind. Infinite bus Transmission line motor 3. If the power loss of transmission line is given. Pu =31R. Synchr. 150 kw motor PF-? Plant What will be effect of these losses on first two conditions?

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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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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Synchronous Motor Power Correction
The synchronous motor using 150-kilowatt real
power so we have to find these three conditions.
Assume
1. If synchronous motor operating at 0.85 lagging
power factor then what the value of transmission
line?
VL = 480 V
100 kW
Ind.
0.78 PF
motor
lagging
200 kW
0.8 PF
lagging
2. If synchronous motor operating at 0.85 leading
power factor then the value of current will be?
Ind.
Infinite bus
Transmission line
motor
3. If the power loss of transmission line is given.
Synchr. 150 kW
PF=?
Pu =312 RL
motor
Plant
What will be effect of these losses on first two
conditions?

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