Q4 250V Series connected dc motor has a total series resistance Ra and Rs of 0.177 ohm (177 m ohm) There are 25 turns on the winding. When Armature current is 100A, torque = 99,47 Ntm, n =2323 rpm, when the torque is reduced to 30 Nm with the same terminal voltage, what will be the new speed?

Q4 250V Series connected dc motor has a total series resistance Ra and Rs of 0.177 ohm (177 m ohm) There are 25 turns on the winding. When Armature current is 100A, torque = 99,47 Ntm, n =2323 rpm, when the torque is reduced to 30 Nm with the same terminal voltage, what will be the new speed?

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 19RQ: Why is the starting torque per A of starting current of a wound-rotor motor higher than that of a...

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Q4 250V Series connected dc motor has a total series resistance Ra and Rs of 0.177 ohm (177 m ohm)
There are 25 turns on the winding. When Armature current is 100A, torque = 99,47 Ntm, n =2323
rpm, when the torque is reduced to 30 Nm with the same terminal voltage, what will be the new speed?

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