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Motors for Makers: A Guide to Steppers, Servos, and Other Electrical Machines by Matthew Scarpino

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2. Preliminary Concepts

This book presents many types of rotary electric motors, each with a different purpose and structure. But viewed from a high level, these motors all perform the same operation: They convert voltage and current into torque and angular speed. In case you’re not familiar with these quantities, this chapter begins by discussing torque and angular speed, and then explores the relationship between the two.

The rest of the chapter touches on three crucial subjects that relate to electric motors:

Image Magnets

Image Equivalent circuit elements ...

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