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Question 1: A DC Shunt excited motor is connected to a variable DC supply. The motor is used to drive a constant load torque of value 40 Nm. The motor is characterized by the following information: Armature resistance Ra= 2 W and field resistance Rf= 120 W, and the magnetizing data when driven at speed 1000 rpm are: Field Current If (A) 0.5 1.0 1.5 2.0 2.5 3.0 52.36 104.72 157.08 209.44 261.8 314.16 Open Circuit Voltage EA (V) Part1: Show the circuit connection: Part 2: If the DC supply voltage connected at the machine terminals is 240 V, calculate: a) The machine speed

Question 1: A DC Shunt excited motor is connected to a variable DC supply. The motor is used to drive a constant load torque of value 40 Nm. The motor is characterized by the following information: Armature resistance Ra= 2 W and field resistance Rf= 120 W, and the magnetizing data when driven at speed 1000 rpm are: Field Current If (A) 0.5 1.0 1.5 2.0 2.5 3.0 52.36 104.72 157.08 209.44 261.8 314.16 Open Circuit Voltage EA (V) Part1: Show the circuit connection: Part 2: If the DC supply voltage connected at the machine terminals is 240 V, calculate: a) The machine speed

Introductory Circuit Analysis (13th Edition)
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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Question 1: A DC Shunt excited motor is connected to a variable DC supply. The motor is used to drive a constant load torque of value 40 Nm. The motor is characterized by the following information: Armature resistance Ra= 2 W and field resistance Rf= 120 W, and the magnetizing data when driven at speed 1000 rpm are: Field Current If (A) 0.5 1.0 1.5 2.0 2.5 3.0 52.36 104.72 157.08 209.44 261.8 314.16 Open Circuit Voltage EA (V) Part1: Show the circuit connection: Part 2: If the DC supply voltage connected at the machine terminals is 240 V, calculate: a) The machine speed b) The machine efficiency. Part 3: If the DC supply voltage connected at the machine terminals is increased to 360 V, calculate: a) The machine speed b) The machine efficiency.
Transcribed Image Text:Question 1: A DC Shunt excited motor is connected to a variable DC supply. The motor is used to drive a constant load torque of value 40 Nm. The motor is characterized by the following information: Armature resistance Ra= 2 W and field resistance Rf= 120 W, and the magnetizing data when driven at speed 1000 rpm are: Field Current If (A) 0.5 1.0 1.5 2.0 2.5 3.0 52.36 104.72 157.08 209.44 261.8 314.16 Open Circuit Voltage EA (V) Part1: Show the circuit connection: Part 2: If the DC supply voltage connected at the machine terminals is 240 V, calculate: a) The machine speed b) The machine efficiency. Part 3: If the DC supply voltage connected at the machine terminals is increased to 360 V, calculate: a) The machine speed b) The machine efficiency.
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