NDLI: Efficiency improvement and torque ripple minimisation of four-phase switched reluctance motor drive using new direct torque control strategy

Content Provider	IET Digital Library
Author	Reddy, Pittam Krishna Ronanki, Deepak Perumal, Parthiban
Abstract	The direct torque control (DTC) strategy is one of the most effective techniques, used to control the switched reluctance motor (SRM) with improved dynamic performance and reduced torque ripple. However, this approach draws a higher source current due to an extension of the phase current into the negative torque region, which lowers the net torque per ampere ratio. This study proposes a new DTC strategy for SRM to overcome this issue by modifying the partition of the sectors and appropriate voltage vector selection. Therefore, the proposed method improves the drive efficiency while minimising torque ripple. To implement this method, a non-linear machine model is developed using the torque and flux characteristics obtained from experimental studies on a four-phase 8/6 SRM. The proposed DTC scheme is implemented on a digital control platform and power loss calculations are performed to evaluate the drive efficiency. Test results show that the proposed DTC method has improved performance in terms of efficiency and torque ripple under various operating conditions in comparison to the conventional DTC strategy.
Starting Page	52
Ending Page	61
Page Count	10
ISSN	17518660
Volume Number	14
e-ISSN	17518679
Issue Number	Issue 1, Jan (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-epa/14/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-epa.2019.0432
Journal	IET Electric Power Applications
Publisher Date	2019-09-06
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Control of Electric Power System Conventional DTC Strategy Digital Control Digital Control Platform Direct Torque Control Strategy Drive Drive Efficiency Efficiency Improvement Flux Characteristic Four-phase Switched Reluctance Motor Improved Dynamic Performance Machine Control Mechanical Variables Control Negative Torque Region Net Torque Phase Current Reluctance Motor Drive Reluctance Motors Synchronous Machine Torque Torque Control Torque Ripple
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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