NDLI: Modified switching scheme-based explicit torque control of brush-less direct current motor drive

Content Provider	IET Digital Library
Author	Nair, Deepthi S. G, Jagadanand George, Saly
Abstract	A modified explicit torque control (ETC) scheme for permanent magnet (PM) machine with non-sinusoidal back emf is investigated in this article. The conventional ETC scheme for the PM machines with non-sinusoidal back emf furnishes a wide band for the switching frequency and offers a faster response in the torque. In this article, a modified scheme for switching vector selection is proposed to reduce the switching frequency while maintaining the advantage of faster torque response. Other than the conventional two-phase excitation, which uses opposite vectors for switching to get the speedier response in torque, the modifications proposed for the ETC of PM machine are (i) a closer vector selection from the available two-phase vector plane and (ii) a combination of two phase and three phase excitation. Both these modifications gives a faster response in the torque as that of conventional ETC, while this offers a reduction in the switching frequency. Switching frequency variations are expressed mathematically, and experimental results are presented for the modified schemes of ETC and for the conventional ETC based to validate the proposed scheme.
Starting Page	1051
Ending Page	1060
Page Count	10
ISSN	17518660
Volume Number	13
e-ISSN	17518679
Issue Number	Issue 7, Jul (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-epa/13/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-epa.2018.5662
Journal	IET Electric Power Applications
Publisher Date	2019-05-21
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Brush-less Direct Current Motor Drive Brushless DC Motor Closer Vector Selection Control of Electric Power System D.C. Machines Drive Faster Torque Response Frequency Control Machine Vector Control Mechanical Variables Control Modified Explicit Torque Control Scheme Modified Switching Scheme-based Explicit Torque Control Motor Drive Nonsinusoidal Back Emf Permanent Magnet Machine Permanent Magnet Motors PM Machine Switching Frequency Reduction Switching Frequency Variations Switching Vector Selection Three Phase Excitation Torque Control Two-phase Excitation Two-phase Vector Plane
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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