The humor is just absurd enough to make the picture-book set howl along with Hippo and Fluffy. New York Times Book Review Fluffy the porcupine is unhappy with his name: So he decided to become fluffier. He climbs a tree and pretends to be a cloud! He even poses as a pillow. (His mother is not pleased when she sits on him.) When Fluffy meets a rhinoceros named Hippo, it puts his plight in perspective and he makes a friend. This terrific tribute to self-acceptance complete with the cutest porcupine pictures on the planet is now part of a fun, 8 x 8 hardcover series about life lessons. Includes downloadable audio!"
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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