Open AccessMinimising torque ripple of SRM by applying DB‐DTFC
Author(s) -
Zhang Wen,
Xu Ai'de,
Han Lele,
Wang Shenghao
Publication year - 2019
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
ISSN - 1751-8679
DOI - 10.1049/iet-epa.2018.5441
Subject(s) - control theory (sociology) , switched reluctance motor , torque , torque ripple , direct torque control , pulse width modulation , ripple , stall torque , stator , engineering , flux linkage , computer science , physics , control (management) , induction motor , electrical engineering , voltage , artificial intelligence , thermodynamics
Since the traditional direct torque control (DTC) of switched reluctance motors (SRMs) has the shortcomings of large torque ripple and non‐constant switching frequency, this study proposes the deadbeat‐direct torque and flux‐linkage control (DB‐DTFC) method for SRM. By analysing the basic principles of SRM, a discrete‐time model is established to predict the future states of the SRM drive system. With DB‐DTFC, the stator flux and torque can be manipulated during each pulse‐width modulation cycle to minimise torque ripple during operation. As a result, the proposed DB‐DTFC can minimise the torque ripple as well as apply space‐vector modulation with a constant switching frequency. Finally, to verify its effectiveness, DB‐DTFC was applied to the 15 kW three‐phase 12/8‐pole SRM test bench in real time and the results are compared with conventional DTC.