Answered: T (Nm) 20 200 Figure P15.12

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A motor drives a load for which the torque required is given by Tload=80020+ωm Nm
The torque–speed characteristic of the motor is shown in Figure P15.12. a. Will this system start from zero speed? Why or why not? b. Suppose that the system is brought up to speed by an auxiliary driver, which is then disengaged. In principle, at what two constant speeds can the system rotate? c. If the system is operating at the lower of the two speeds and power to the motor is briefly interrupted so the system slows by a few radians per second, what will happen after power is restored? Why? d. Repeat (c) if the system is initially operating at the higher speed.

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