Stepping and Switched-reluctance Motors
1. Introduction
In previous editions of this book, switched-reluctance motors were included with one of their direct industrial competitors, brushless permanent magnet motors, which appear in Chapter 9 in this edition. In this edition we have decided that because the fundamental mechanism of torque production is the same in both switched-reluctance and stepping motors, there is a strong argument for grouping them together. We will see that there are substantial differences between the modes of operation (and the power ratings), but both have projecting ‘iron’ poles or teeth on both stator and rotor, and produce torque by reluctance action, rather than by the ‘BIl’ mechanism we have encountered ...
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