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Improved over Modulation Strategy in DTC with Constant Frequency Torque Controller of PMSM for Quick Torque Control at Different Dynamic Conditions
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Publication Year
2018-12-03
Journal
2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
Publisher
Institute of Electrical and Electronics Engineers Inc.
Citation
2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018, pp.3394-3399
Keyword
Discontinuous PWMSwitching losses
Mesh Keyword
Constant switching frequencyDifferent operating conditionsDirect torque controlDiscontinuous PWMDynamic performanceFast torque responseSwitching lossZero voltage vectors
All Science Classification Codes (ASJC)
Energy Engineering and Power TechnologyRenewable Energy, Sustainability and the EnvironmentControl and OptimizationComputer Networks and CommunicationsHardware and ArchitectureInformation Systems and Management
Abstract
This paper proposes an improved dynamic overmodulation for direct torque control with constant switching frequency controller (DTC-CFTC) of AC motor drives to achieve fast dynamic performance under different operating conditions. The dynamic process of the DTC is obtained by the selection of active voltage vectors in the torque trainset. To further improve the dynamic performance, the most optimized active voltage is identified and selected based on the flux position. However, owing to the nature of the DTC-CFTC, some zero voltage vectors are selected in the dynamic process. As such, with the optimized voltage vector, the torque performance of DTC-CFTC is still slow. By simultaneous modification of torque and flux error statuses, the proposed overmodulation strategy can overcome this problem and achieve very fast torque response at different speed and torque operations. The effectiveness of the proposed overmodulation in DTC-CFTC of PMSM is verified by simulation results.
Language
eng
URI
https://aurora.ajou.ac.kr/handle/2018.oak/36273
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85060301611&origin=inward
DOI
https://doi.org/10.1109/ecce.2018.8557694
Journal URL
http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=8537478
Type
Conference
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Lee, Kyo-Beum이교범
Department of Electrical and Computer Engineering
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