NDLI: Influence of voltage vectors of a NPC inverter on torque and flux variations of a DTC drive considering different load and speed conditions

Content Provider	IEEE Xplore Digital Library
Author	Radan, A. Gharakhani, A.
Copyright Year	2007
Description	Author affiliation: Islamic Azad Univ., Tehran (Radan, A.; Gharakhani, A.)
Abstract	Direct torque control (DTC) is one of the most effective vector control methods proposed for high performance drives of a wide variety of industrial applications. This control method becomes more attractive when applied on the Neutral Point Clamped (NPC) Inverter driven drives. While exploring accurate analytical equations of torque and flux variations, this paper investigates analytically the affecting characteristic of voltage vectors of a NPC converter on variations of stator flux and electromagnetic torque (decreasing or increasing) of medium voltage induction motor drives. The analytically obtained results show that the affecting characteristic of some voltage vectors depends not only on the flux sector in which the stator flux vector is located but also on the exact position of flux vector inside that sector. Besides the load and speed conditions of a machine can change the affecting characteristic of voltage vectors undesirably. The paper studies application of DTC method in NPC inverter driven induction motors and considers different load and speed conditions. It proposes a set of appropriate voltage vectors for accurate control of torque and flux variations considering degrees of freedom in voltage vector selection provided by NPC Inverter.
Starting Page	1
Ending Page	10
File Size	710858
Page Count	10
File Format	PDF
ISBN	9789275815108
DOI	10.1109/EPE.2007.4417278
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-09-02
Publisher Place	Denmark
Access Restriction	Subscribed
Rights Holder	EPE Association
Subject Keyword	Industrial control Torque converters Electromagnetic induction Inverters Electromagnetic analysis Machine vector control Equations Induction motor Multilevel converters Torque control Voltage Stators Direct torque and flux control
Content Type	Text
Resource Type	Article

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