Kai Wang; Zi-Qiang Zhu Third Harmonic Utilization in Permanent Magnet Machines 9789811344657

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Автор: Kai Wang; Zi-Qiang Zhu
Название: Third Harmonic Utilization in Permanent Magnet Machines
ISBN: 9789811344657
Издательство: Springer
Классификация:

Машиноведение

Организация производственных процессов

Электротехническое машиностроение

ISBN-10: 9811344655
Обложка/Формат: Soft cover
Страницы: 211
Вес: 0.35 кг.
Дата издания: 2019
Язык: English
Издание: Softcover reprint of
Иллюстрации: 132 illustrations, color; 8 illustrations, black and white; xi, 211 p. 140 illus., 132 illus. in color.
Размер: 234 x 156 x 12
Читательская аудитория: General (us: trade)
Основная тема: Engineering
Ссылка на Издательство: Link
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Поставляется из: Германии
Описание:

This book investigates the utilization of harmonics in the permanent magnet (PM) or rotor shape to improve the torque density of PM brushless AC machines including three-phase inner rotor and outer rotor machines, five-phase machines, dual three-phase machines, linear machines, by means of analytical, finite element analyses, and as well as experimental validation.

The torque density can be improved while the torque ripple remains low in PM shaping utilizing the 3rd harmonic. In this book, the analytical expression of output torque is derived for PM machines with rotor shape using the 3rd harmonic, and then the optimal 3rd harmonic for maximizing torque is analytically obtained.

The book compares the PM shape in surface-mounted PM (SPM) machines and the rotor lamination shape in interior PM (IPM) machines utilizing the 3rd harmonic, and it becomes clear that their shaping methods and amount of torque improvement are different.

In a five-phase PM machine, the 3rd harmonic can be utilized in both the current waveform and PM shapes to further improve the output torque. For the dual three-phase SPM machines without deteriorating the torque more than 30% when the optimal 3rd harmonic into both the current and PM shape are injected.

The harmonics in airgap flux density have significant influence on the cogging torque, stator iron flux distribution, and radial force between the rotor and stator. These effects has been investigated as well in this book.

Дополнительное описание:

General Introduction.- Torque Enhancement of Three Phase Surface-Mounted Permanent Magnet Machine Using 3rd Order Harmonic.- Average Torque Improvement of Three Phase Interior Permanent-Magnet Machine Using 3rd Harmonic in Rotor Shape.- Third Order H

Third Harmonic Utilization in Permanent Magnet Machines, Kai Wang; Zi-Qiang Zhu