Erschienen: 29.07.2014 Abbildung von Bostanci | Performance Analysis of Brushless DC Machines with Axially Displaceable Rotor | 2014

Bostanci

Performance Analysis of Brushless DC Machines with Axially Displaceable Rotor

lieferbar, ca. 10 Tage

2014. Buch. 179 S. Softcover

Logos. ISBN 978-3-8325-3743-2

Format (B x L): 14,5 x 21 cm

In englischer Sprache

Das Werk ist Teil der Reihe: AutoUni - Schriftenreihe; 64

Produktbeschreibung

In this study, a mechanical field weakening method that is applied to enhance the high-speed performance of a PM brushless machine by reducing the active axial machine length is analyzed in terms of its operational characteristics and efficiency. For this purpose, an existing multi-phase brushless DC (BLDC) machine with an axially displaceable rotor is used. First, the parameters of this machine, such as back EMF, torque constant and phase inductances are determined for various axial rotor positions by using 2-D and 3-D FEM analyses. Then, the determined machine parameters are used to build a dynamic simulation model of the drive system. By using this developed system model, the operational characteristics including the limits of the mechanical field weakening method are analyzed. In the second place, the efficiency of the BLDC machine is investigated, laying the main focus of attention on the additional losses in the field weakening range. In order to determine these losses, new numerical and measurement methods are developed. Furthermore, the measurement results are used to validate the numerical results. Finally, recommendations for PM brushless machines with an axially displaceable stator/rotor including possible design measures to reduce the additional losses and the application of mechanical field weakening are presented.

Gesamtwerk

Die 8. Auflage ist wieder auf sechs Bände angelegt. Darin finden sich übersichtlich und in systematischer Gliederung Vertragsmuster aus der Feder erfahrener Experten. Jedem dieser Muster folgen Anmerkungen, mit denen der dem Vertragsentwurf zu Grunde liegende Sachverhalt und die Gründe für die Wahl des spezifischen Formulars erläutert werden.

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