Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/232685
Title: An Improved Flux Observer for Field-Oriented Control of Induction Motors Based on Dual Second-Order Generalized Integrator Frequency-Locked Loop
Authors: Zhen Xin;Rende Zhao;Frede Blaabjerg;Longlong Zhang;Poh Chiang Loh
Year: 2017
Publisher: IEEE
Abstract: Flux estimation is of great importance for high-performance motor drives. In order to improve flux estimation accuracy and reduce system complexity, a new flux estimation method based on the second-order generalized integrator frequency-locked loop (SOGI-FLL) was presented recently. Compared with the conventional low-pass filter-based method, the SOGI-FLL does not need compensation and can effectively attenuate the high-order harmonics in the back electromotive force (back EMF). However, the dynamic performance of this method is not satisfactory, because the back EMF frequency estimated by FLL suffers from inaccuracy and double-frequency oscillation when the back EMF changes. This paper presents a detailed theoretical analysis on the dynamic errors of the SOGI-FLL-based flux estimation method. To overcome the drawback, an improved method based on dual SOGI-FLL (DSOGI-FLL) is proposed. The properties and performance of the DSOGI-FLL-based flux estimation method are analyzed in comparison with the SOGI-FLL, demonstrating its improved dynamic response. Simulations and experimental results on an 11-kW three-phase induction motor verify the excellent performance of the proposed DSOGI-FLL-based flux estimation method.
URI: http://localhost/handle/Hannan/232685
volume: 5
issue: 1
More Information: 513,
525
Appears in Collections:2017

Files in This Item:
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7728055.pdf4.99 MBAdobe PDF
Title: An Improved Flux Observer for Field-Oriented Control of Induction Motors Based on Dual Second-Order Generalized Integrator Frequency-Locked Loop
Authors: Zhen Xin;Rende Zhao;Frede Blaabjerg;Longlong Zhang;Poh Chiang Loh
Year: 2017
Publisher: IEEE
Abstract: Flux estimation is of great importance for high-performance motor drives. In order to improve flux estimation accuracy and reduce system complexity, a new flux estimation method based on the second-order generalized integrator frequency-locked loop (SOGI-FLL) was presented recently. Compared with the conventional low-pass filter-based method, the SOGI-FLL does not need compensation and can effectively attenuate the high-order harmonics in the back electromotive force (back EMF). However, the dynamic performance of this method is not satisfactory, because the back EMF frequency estimated by FLL suffers from inaccuracy and double-frequency oscillation when the back EMF changes. This paper presents a detailed theoretical analysis on the dynamic errors of the SOGI-FLL-based flux estimation method. To overcome the drawback, an improved method based on dual SOGI-FLL (DSOGI-FLL) is proposed. The properties and performance of the DSOGI-FLL-based flux estimation method are analyzed in comparison with the SOGI-FLL, demonstrating its improved dynamic response. Simulations and experimental results on an 11-kW three-phase induction motor verify the excellent performance of the proposed DSOGI-FLL-based flux estimation method.
URI: http://localhost/handle/Hannan/232685
volume: 5
issue: 1
More Information: 513,
525
Appears in Collections:2017

Files in This Item:
File SizeFormat 
7728055.pdf4.99 MBAdobe PDF
Title: An Improved Flux Observer for Field-Oriented Control of Induction Motors Based on Dual Second-Order Generalized Integrator Frequency-Locked Loop
Authors: Zhen Xin;Rende Zhao;Frede Blaabjerg;Longlong Zhang;Poh Chiang Loh
Year: 2017
Publisher: IEEE
Abstract: Flux estimation is of great importance for high-performance motor drives. In order to improve flux estimation accuracy and reduce system complexity, a new flux estimation method based on the second-order generalized integrator frequency-locked loop (SOGI-FLL) was presented recently. Compared with the conventional low-pass filter-based method, the SOGI-FLL does not need compensation and can effectively attenuate the high-order harmonics in the back electromotive force (back EMF). However, the dynamic performance of this method is not satisfactory, because the back EMF frequency estimated by FLL suffers from inaccuracy and double-frequency oscillation when the back EMF changes. This paper presents a detailed theoretical analysis on the dynamic errors of the SOGI-FLL-based flux estimation method. To overcome the drawback, an improved method based on dual SOGI-FLL (DSOGI-FLL) is proposed. The properties and performance of the DSOGI-FLL-based flux estimation method are analyzed in comparison with the SOGI-FLL, demonstrating its improved dynamic response. Simulations and experimental results on an 11-kW three-phase induction motor verify the excellent performance of the proposed DSOGI-FLL-based flux estimation method.
URI: http://localhost/handle/Hannan/232685
volume: 5
issue: 1
More Information: 513,
525
Appears in Collections:2017

Files in This Item:
File SizeFormat 
7728055.pdf4.99 MBAdobe PDF