A three-phase, delta connected, 2-pole 1000V, 50 Hz asynchronous motor rotates at 2920 rpm. Theequivalent circuit parameters reduced to the stator are given below. Since friction losses of thisasynchronous motor are neglected, using the equivalent circuit given below;R_1=0,7 0 X_1=0,3 0G_c=0,3 msR_2'=0,4 2X_2'=0,4 0 B_m=D0,5 msI; R JX, jX'; R';V, G B.R', (1-s)a) Calculate the iron losses of the engine. (calculate in watts)b) Calculate the output power of the engine. (calculate in kilowatts)c) Calculate the input power of the motor. (calculate in kilowatts)d) Calculate the efficiency of the engine.e) Calculate the torque of the motor. (calculate in Nm)

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A three-phase, delta connected, 2-pole 1000V, 50 Hz asynchronous motor rotates at 2920 rpm. The equivalent circuit parameters reduced to the stator are given below. Since friction losses of this asynchronous motor are neglected, using the equivalent circuit given below; R 1=070 X 1=03 O G c=03 mS

A three-phase, delta connected, 2-pole 1000V, 50 Hz asynchronous motor rotates at 2920 rpm. The equivalent circuit parameters reduced to the stator are given below. Since friction losses of this asynchronous motor are neglected, using the equivalent circuit given below; R 1=070 X 1=03 O G c=03 mS

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.

Question

A three-phase, delta connected, 2-pole 1000V, 50 Hz asynchronous motor rotates at 2920 rpm. The
equivalent circuit parameters reduced to the stator are given below. Since friction losses of this
asynchronous motor are neglected, using the equivalent circuit given below;
R_1=0,7 0 X_1=0,3 0
G_c=0,3 ms
R_2'=0,4 2
X_2'=0,4 0 B_m=D0,5 ms
I; R JX, jX'; R';
V, G B.
R', (1-s)
a) Calculate the iron losses of the engine. (calculate in watts)
b) Calculate the output power of the engine. (calculate in kilowatts)
c) Calculate the input power of the motor. (calculate in kilowatts)
d) Calculate the efficiency of the engine.
e) Calculate the torque of the motor. (calculate in Nm)

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