In recent years, numerous books on electric machines of medium or large power have been published, but only a few specialized books addressing electric small machines have been released. However, the economic significance of electric small machines is constantly increasing. Their applications in industry, workshops, and households have rapidly grown in recent years and will continue to rise in the future. The development of electronics (cheaper, more compact, and more flexible circuits) and materials (e.g., higher quality magnetic and insulating materials) as well as new design principles make it possible to develop motor-driven devices that increasingly assist or even completely take over tasks from humans. The requirements placed on the motors have become so diverse that...