NDLI: Control methods for a brushless DC motor drive with a new converter topology

Content Provider	IEEE Xplore Digital Library
Author	Shehada, Ahmed Krishnan, R.
Copyright Year	2015
Description	Author affiliation: Bradley Department of Electrical Engineering, Virginia Polytechnic Institute and State University. Blacksburg, VA (Shehada, Ahmed; Krishnan, R.)
Abstract	This paper presents a control strategy for a brushless DC motor (BLDCM) drive with a new converter topology. The new topology is based on the conventional voltage-fed inverter, but includes an additional source such as a capacitor or a battery, and requires connection to the BLDCM neutral. The objective of the proposed control strategy is to control the otherwise unregulated voltage across the additional source, while maintaining commanded speed or torque. Three variations of the control strategy are presented. A detailed simulation model is used to evaluate the performance of the considered converter with proposed control strategy, and compare it to a conventional voltage-fed inverter BLDCM drive. Performance measures include torque per unit current, copper losses per unit current, inverter losses, and efficiency. It is also shown that exact torque and speed control can be exercised at up to twice the rated speed. Simulation results for operation at twice the rated speed with the torque controlled to half the rated value are provided to demonstrate that. This is a major advantage over the conventional BLDCM drive, where speed and torque are usually uncontrolled above rated speed. In addition, the drive is shown to deliver rated power (at rated speed) with only half the dc link voltage.
Starting Page	904
Ending Page	909
File Size	312993
Page Count	6
File Format	PDF
e-ISBN	9781479979417
DOI	10.1109/IEMDC.2015.7409168
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-05-10
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Torque Capacitors Topology Control systems Brushless DC motors Voltage control Simulation DC-AC power converters permanent magnet motors brushless motors variable speed drives
Content Type	Text
Resource Type	Article

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