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Wind turbine gearboxes present major reliability issues, leading to great interest in the current development of gearless direct-drive wind energy systems. Offering high reliability, high efficiency and low maintenance, developments in these direct-drive systems point the way to the next generation of wind power, and Electrical drives for direct drive renewable energy systems is an authoritative guide to their design, development and operation.

Part one outlines electrical drive technology, beginning with an overview of electrical generators for direct drive systems. Principles of...

This book is on the electromechanical design aspects of a high-speed permanent-magnet synchronous machine integrated with a carbon fibre flywheel. The integrated machine is part of a flywheel energy storage system for use in a hybrid electric city bus. The book starts by investigating several energy storage technologies with the aim of finding the most suitable candidate for use in the energy storage system of a large hybrid electric road vehicle. High-speed composite flywheels emerge as the most suitable technology. The electrical machine design is approached analytically: a comprehensive...