D. 65 kw. 2. When a d-c motor is tested by the electrical input method, the field rheostat is adjusted to give A. minimum speed at maximum load. B. rated speed at full load. C. maximum speed at minimum load. D. rated speed at no load. Jamperatur

D. 65 kw. 2. When a d-c motor is tested by the electrical input method, the field rheostat is adjusted to give A. minimum speed at maximum load. B. rated speed at full load. C. maximum speed at minimum load. D. rated speed at no load. Jamperatur

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter43: About Dc Motors

Section: Chapter Questions

Problem 1SQ

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Concept explainers

DC Series Motors

A DC motor is a type of electric motor which converts electric energy into mechanical energy. The forces that are produced by the magnetic field are what those common types of motors rely upon. Either electro-mechanical or electronic, all types of DC motors have some internal mechanism to change the current direction in part of the DC motors. As the DC motors could be powered from existing DC lighting power distribution systems, these motors were the first form of motors widely used. By changing the strength of the current in its field winding or by using a variable supply voltage, the speed of the DC motors can be controlled over a wide range.

Question

D. 65 kw.
2. When a d-c motor is tested by the electrical input method, the field rheostat is adjusted to give
A. minimum speed at maximum load.
B. rated speed at full load.
C. maximum speed at minimum load.
D. rated speed at no load.
of 120 ohms at 30 C, its corrected resistance at a temperature

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