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      Radial force dynamic current compensation method of single winding bearingless flywheel motor

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          Abstract

          The position of rotor and stator in switched reluctance motor is exchanged to obtain the single winding bearingless flywheel motor (SWBFM), which is more useful for flywheel energy storage with outer rotor. Compared with the switched reluctance motor, bearingless flywheel motor has obvious advantages in cost savings and consumption reducing. The radial force and torque are produced by single windings and the outer rotor could directly drive the flywheel with less mechanical transmission. In this study, a mathematical model of SWBFM is established based on Maxwell tensor method, in addition, the correction factor is present to obtain an accurate mathematical model based on finite element. In energy storage keeping state, the flywheel energy storage system could run on rated speed without the power input. Considering the relationship between the angle and the radial force coefficient, and the difference of radial force coefficient with each tooth pole, radial force dynamic current compensation methods of without β direction constraint and β direction constraint are present to ensure the SWBFM stable suspension under the condition of winding open-circuit fault. The results show that the proposed compensation methods are feasible and have high precision.

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          Most cited references 21

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          Independent Control of Average Torque and Radial Force in Bearingless Switched-Reluctance Motors With Hybrid Excitations

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            Combined control of a distribution static synchronous compensator∕flywheel energy storage system for wind energy applications

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              Optimal Winding Arrangements of a Bearingless Switched Reluctance Motor

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                Author and article information

                Contributors
                Journal
                IET-PEL
                IET Power Electronics
                IET Power Electron.
                The Institution of Engineering and Technology
                1755-4535
                1755-4543
                July 2015
                : 8
                : 7
                : 1224-1229
                Affiliations
                [1 ] School of Electrical and Information Engineering, Jiangsu University , Zhenjiang 212013, People's Republic of China
                [2 ] College of Electrical Engineering, Nanjing Institute of Technology , Nanjing 211167, People's Republic of China
                Article
                IET-PEL.2014.0502 PEL.2014.0502.R2
                10.1049/iet-pel.2014.0502

                This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)

                Product
                Funding
                Funded by: National Natural Science Foundation of China
                Award ID: 51377074
                Categories
                Research Articles

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