NDLI: Analytical and Offline Approach to Select Optimal Hysteresis Bands of DTC for PMSM

Content Provider	IEEE Xplore Digital Library
Author	Mathapati, S. Bocker, J.
Copyright Year	1982
Abstract	The switching frequency of an inverter under direct torque control is mainly decided by the flux- and torque-controller output switching counts. It is known that, with fixed hysteresis bands, the switching frequency varies as the operating point changes. It is possible, however, to keep the switching frequency constant by the adaptation of hysteresis bands. The switching frequency is a function of both torque and flux bands. Different combinations of flux and torque bands can be used to achieve a desired switching frequency. However, for optimal control, one among the many available combinations has to be chosen. In this contribution, it is proposed to select the hysteresis bands based on the criterion of the minimum harmonic distortion in the motor currents for the required switching frequency. An analytical procedure is presented to calculate these optimal bands for the permanent-magnet synchronous motor. The analytical results were cross checked with simulation studies and validated by detailed experimentation. In order not to degrade the control performance by computational delay, a field-programmable-gate-array-based control platform is being used for implementation.
Sponsorship	IEEE Industrial Electronics Society
Starting Page	885
Ending Page	895
Page Count	11
File Size	1077921
File Format	PDF
ISSN	02780046
Volume Number	60
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Torque Vectors Switching frequency Hysteresis Stators Control systems Frequency control total harmonic distortion (THD) Direct torque control (DTC) field-programmable gate array (FPGA) optimal control permanent-magnet synchronous motor (PMSM)
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering Computer Science Applications

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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