NDLI: Novel electronic device to improve the performance of variable-torque fixed-speed induction motors

Content Provider	IEEE Xplore Digital Library
Author	Ferreira, F.J.T.E. Guarino Simoes, J. Oliveira, J.M.
Copyright Year	2015
Description	Author affiliation: Dept. of Electr. Eng. Eng. Inst. of Coimbra (ISEC), Polytech. Inst. of Coimbra (IPC), Coimbra, Portugal (Guarino Simoes, J.; Oliveira, J.M.) \|\| Dept. of Electr. & Comput. Eng., Univ. of Coimbra, Coimbra, Portugal (Ferreira, F.J.T.E.)
Abstract	In this paper, a novel ultra-compact, self-powered, high-efficiency, solid-state electronic device to reduce the energy consumption and improve the power factor at light load of direct-on-line, variable-torque, fixed-speed, three-phase, squirrel-cage induction motors, by means of a novel load-based stator-winding connection-mode management technique, is presented, including some technical and economic considerations on its use. This device also performs optimized motor soft-starting, advanced motor protection and fault diagnosis. The ultra-compact design enables the device to be installed inside the motor terminal box, saving space in the switchboard. In relation to the electromechanical star-delta starters, the proposed device offers higher reliability and requires half of the cables from the switchboard to the motor. Moreover, due to the independent per-phase switching control, the current and voltage transients produced during the switching instants are smoother, extending the motor lifetime. The energy savings potential in applications with long low load periods can be up to 15%.
Starting Page	281
Ending Page	288
File Size	1876391
Page Count	8
File Format	PDF
ISSN	21669546
e-ISBN	9781479963010
DOI	10.1109/CPE.2015.7231087
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-06-24
Publisher Place	Portugal
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Thyristors Induction motors star/delta connection stator winding connection mode change Switches power factor three-phase induction motor soft-starting Heating electronic device Stator windings Prototypes energy efficiency Transient analysis magnetizing flux adjustment variable torque/load
Content Type	Text
Resource Type	Article

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