NDLI: Low-cost direct instantaneous torque control for switched reluctance motors with bus current detection under soft-chopping mode

Content Provider	IET Digital Library
Author	Gan, Chun Wu, Jianhua Sun, Qingguo Yang, Shiyou Hu, Yihua Jin, Lebing
Abstract	This study proposed a low-cost torque distribution function (TSF)-based direct instantaneous torque control (DITC) technique for switched reluctance motors (SRMs) by bus current detection under soft-chopping mode. A three-phase 12/8-pole prototype SRM is employed to analyse the phase currents and operation states, and a new converter connection with bus current sensor placement strategy is presented to replace the phase current sensors in each phase leg. Considering that the conventional bus current contains both the chopping current and demagnetisation current, the current sensor is placed in a new bus to remove all the needless demagnetisation currents. To obtain the chopping current information from the bus current for DITC implementation, pulse-width modulation signals with extremely short turn-off time are injected into the lower transistors to insert the chopping current detection states for brief intervals during each fundamental frequency cycle. The DITC scheme is implemented directly on the detected chopping currents from bus current based on a sinusoidal TSF. The proposed DITC system is more compact and low cost by using just a bus current sensor. The effectiveness of the proposed technique is verified by the simulation and experimental results.
Starting Page	482
Ending Page	490
Page Count	9
ISSN	17554535
Volume Number	9
e-ISSN	17554543
Issue Number	Issue 3, Mar (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/9/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2015.0370
Journal	IET Power Electronics
Publisher Date	2016-03-09
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Bus Current Detection Bus Current Sensor Placement Strategy Choppers (circuits) Chopping Current Detection State Control of Electric Power System Converter Connection Demagnetisation Demagnetisation Current Direct Instantaneous Torque Control DITC Scheme Machine Vector Control Mechanical Variables Control Phase Current Phase Leg Power Converter Power Supplies to Apparatus Pulse Width Modulation PWM Power Converter Reluctance Motors Sensor Placement Short Turn-off Time Sinusoidal TSF Soft-chopping Mode SRM Switched Reluctance Motors Synchronous Machine Torque Control Torque Converter Torque Distribution Function
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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