NDLI: Buck converter based model for a brushless DC motor drive without a DC link capacitor

Content Provider	IET Digital Library
Author	Ransara, Hewa Kokawalage Samitha Madawala, Udaya Kumara Liu, Tian Hua
Abstract	This study presents a simple model for a brushless DC (BLDC) motor drive operated directly from rectified mains without a DC link capacitor. A switching strategy with single switch control is adopted to regulate either the speed or torque. Operation of the drive during any switching state is similar to that of a buck converter and, thus, a buck converter based model is proposed to accurately predict its behaviour. Using the model, analytical expressions are derived for the motor current to investigate the impact of operation without the DC link capacitor on torque. Theoretical behaviour is compared with Matlab/Simulink based simulations as well as that observed from a 250 W prototype motor drive to demonstrate the validity of the modelling technique. Results convincingly indicate that the proposed buck converter based model is accurate and can be used as a design tool, being simple and requiring less computational time and applicable to conventional BLDC motor drives with similar switching patterns.
Starting Page	628
Ending Page	635
Page Count	8
ISSN	17554535
Volume Number	8
e-ISSN	17554543
Issue Number	Issue 4, Apr (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/8/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2014.0037
Journal	IET Power Electronics
Publisher Date	2015-01-19
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Acceleration Angular Velocity Control BLDC Motor Drive Brushless DC Motor Brushless DC Motor Drive Buck Converter Based Model Control of Electric Power System D.C. Machines DC Motor Drive Drive Machine Control Mechanical Variables Control Power 250 W Power Converter Power Electronics Power Supply Rotation Control Single Switch Control Speed Control Supervisory Circuit Switching Strategy Torque Control Velocity
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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