Sensorless control of brushless doubly-fed reluctance machines using an angular velocity observer

Jovanovic, Milutin and Dorrell, D. (2007) Sensorless control of brushless doubly-fed reluctance machines using an angular velocity observer. In: Power Electronics and Drive Systems, 2007. PEDS '07. 7th International Conference on. IEEE, Piscataway, NJ, pp. 717-724. ISBN 978-1-4244-0645-6

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The brushless doubly-fed reluctance machine (BDFRM) has been considered by academic and industrial communities as a potential alternative to conventional doubly-excited wound rotor induction machines (DEWRIM) in variable speed applications with limited speed ranges such as large pumps and wind turbines. While offering similar cost benefits, afforded by the use of partiallyrated power electronics, the BDFRM has the following important advantages over DEWRIM - brushless design and consequent maintenance-free operation. The main purpose of this paper is to further improve the reliability and costeffectiveness of the BDFRM drive by proposing a new observer based algorithm for speed and direct torque (and flux) control (DTC) of this machine without a shaft position sensor using a maximum power factor control strategy as a case study. The developed sensorless control scheme has been experimentally verified on a small BDFRM prototype, and obtained test results have shown that it can perform very well down to zero applied frequency to the inverter-fed winding this being difficult or impossible to achieve with traditional DTC concepts.

Item Type: Book Section
Uncontrolled Keywords: Brushless doubly fed, reluctance machines, sensorless control, velocity observer
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 28 Jan 2015 09:42
Last Modified: 12 Oct 2019 19:06

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