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Multiphase Permanent Magnet Machines: Design, Modelling, and Control

By (author) Kai Wang, By (author) J. Li, By (author) L. F. Zhang, By (author) H. Y. Sun

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The adoption of advanced technical solutions to match the requirements of energy efficiency is becoming increasingly essential, promoting a gradual transformation in the field of mechanical actuators and shifting the attention to more electric and efficient systems. The main driving force is the need for new solutions in specific application areas such as railway traction, electric and hybrid vehicle applications, â€˜more-electricâ€™ aircraft, electric ship propulsion, and general high-power applications. Multi-phase motor drives are gaining a growing interest because they permit a boost in torque and power density, allowing the design of very compact high efficiency drives with positive reliability outcomes.Â Traditional solutions for electric drive/generation systems, based on three-phase machinery, are not necessarily the best solutions, however. Moreover, since the electric machine is either typically decoupled from the mains, or the actual power system is an autonomous one, the number of phases of the machine does not have to be limited to only three. The resultant â€˜multiphase machinesâ€™ offer numerous potential advantages over their three-phase counterparts. This book aims at presenting the new research results concerning multiphase machines and drives, AC multiphase power converters and their applications, as related to â€˜more-electricâ€™ transport.

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Bonsai Success in Southern Africa

Carl Morrow
Paperback / softback
160 pages
was: R 320.95
now: R 288.95
Stock is usually dispatched in 6-12 days from date of order

In this uniquely Southern African book, Carl Morrow and Keith Kirsten guide readers step by step into the magical realms of bonsai as a hobby, horticultural practice and art form.

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Fifteen Dogs

AndrÃ© Alexis
Paperback / softback
176 pages
was: R 280.95
now: R 252.95
Available from overseas. Dispatched in aprox 4-8 weeks as local supplier is out of stock

A pack of dogs are granted the power of human thought - but what will it do to them? A surprising and insightful look at the beauty and perils of consciousness.

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The Ballerina and the Bull: Anarchist Utopias in the Age of Finance

Johanna Isaacson
Paperback / softback
288 pages
was: R 306.95
now: R 275.95
This title will take longer to obtain, and should be delivered in 6-8 weeks

Our moment has seen the resurgence of an anarchist sensibility, from the uprisings in Seattle in 1999 to the Occupy movement of 2011.

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