A series-connected dc motor is designed to operate with a variable load. The resistances RA and RF are negligible. To attain high efficiency, the motor has been designed to have very small rotational losses. For a load torque of 100 Nm, the machine runs at its maximum rated speed of 1200 rpm. a. Find the speed for a load torque of 300 Nm. b. What is the no-load speed? What are the potential consequences of having the load become disconnected from the motor without disconnecting the dc source?
A series-connected dc motor is designed to operate with a variable load. The resistances RA and RF are negligible. To attain high efficiency, the motor has been designed to have very small rotational losses. For a load torque of 100 Nm, the machine runs at its maximum rated speed of 1200 rpm. a. Find the speed for a load torque of 300 Nm. b. What is the no-load speed? What are the potential consequences of having the load become disconnected from the motor without disconnecting the dc source?
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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A series-connected dc motor is designed to operate with a variable load. The resistances RA and RF are negligible. To attain high efficiency, the motor has been designed to have very small rotational losses. For a load torque of 100 Nm, the machine runs at its maximum rated speed of 1200 rpm. a. Find the speed for a load torque of 300 Nm. b. What is the no-load speed? What are the potential consequences of having the load become disconnected from the motor without disconnecting the dc source?
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