Stella Ryman, the feisty octogenarian star of Mel Anastasiou's Fairmount Manor Mysteries, made her debut with The Case of the Third Option and returned with The Poison Pen Affair, The Four Digit Puzzle, and The Case of the Vanished Resident. In her latest adventure, The Thief Named Edge, the machineries of institution fail to protect Fairmount Manor, and it's up to Stella to chase down a thief. No good deed goes unpunished, though, and Stella faces a sacrifice that will hit her where she lives.
Linear electric actuators (LEAs) and linear electric generators (LEGs) are widely used electromagnetic devices. This book deals with LEAs that convert electric energy into controlled mechanical motion of limited travel and LEGs that transform mechanical energy into electric energy. Examples range from loudspeakers and microphones to magnetically levitated material transfer in ultraclean rooms. Much of the literature on linear actuators and generators covers the principles of operation and performance calculations of these devices. Little has been published on their control or on detailed design methodologies. This book presents the first unified treatment of the subject, including the construction, operation, control and design of LEAs and LEGs. Chapters describe linear induction, permanent-magnet, linear reluctance, switched reluctance, and linear stepper actuators, as well as various types of linear electric generators. The text is amply illustrated with numerous design examples.
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