Answered: 40% Part B: It the load Speed-T orque…

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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| 40% | Part B: If the load Speed-Torque characteristics (including the mechanical | Tasses) is described by following equation: TL= [11.1+(§/150) Nrl, as shown in Fig 1. | Determine the speed control range(masimum range) for three of the following ases: | a- Reducing the stator voltage using autotransformer. b- Inserting extemal rotor resistance. [ | Reducing the input voltage by 35%. | | o Reducingteiopus voiage st V=085 Ve

40% Part B: If the load Speed-Torque characteristics (including the mechanical
losses) is described by following equation: TL= |11.1+(5/150) Nr, as shown
in Fig.1.
Determine the specd control range(maximum range) for three of the following
cases:
a- Reducing the stator voltage using autotransformer.
b- Inserting extemal rotor resistance.
c- Reducing the input voltage by 35%.
d- Reducing the input voltage so that Vnew=0.85 Vold.
Speed-Torque curve
Te
100
140
120
1500
Shaft speedN rpm
Figure 1
N anbua

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