Three-phase permanent-magnet stepper motor (each pulse advance the motor by 60 electrical degree) required for one particular application must be capable of controlling the position of a shaft in steps of 7.5°, and it must be capable of running at speeds of up to 300 r/min. (a) How many poles must this motor have? Electrical angle =P\2 (mechanical angle) (b) At what rate must control pulses be received in the motor's control unit if it is to be driven at 300 r/min?

Three-phase permanent-magnet stepper motor (each pulse advance the motor by 60 electrical degree) required for one particular application must be capable of controlling the position of a shaft in steps of 7.5°, and it must be capable of running at speeds of up to 300 r/min. (a) How many poles must this motor have? Electrical angle =P\2 (mechanical angle) (b) At what rate must control pulses be received in the motor's control unit if it is to be driven at 300 r/min?

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter8: Basic Electric Motors

Section: Chapter Questions

Problem 28RQ: What are the advantages and disadvantages of using the following types of motors? shaded-pole...

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