An Efficient Wide-Speed Direct Torque Control Based on Fuzzy Logic Technique

Conventional Direct Torque Control (CDTC) system faces the problems of high flux and torque ripples, and has difficulty in improving the performance of dynamic torque response and control flux locus at very low speed. Under field weakening condition, when the speed is beyond the rated speed, the available power is limited and the speed range cannot be increased any more. A DTC control system based on Fuzzy Logic technology (FL) is proposed. The proposed system aims to make less torque ripples and faster dynamic response than CDTC system by introducing some new fuzzy variables and rescheduling the fuzzy switcher rules. The fuzzy logic control also solved field weakening problem, the speed range can be dramatically increased and the torque ripple when working in field weakening region can be significantly reduced by the proposed technique. We built the system based on matlab, and the simulation results will be analyzed to show the efficiency of the proposed technique.

Name thesis:degree_name

Master of Science in Electrical Engineering

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

College of Engineering

Grantor dc:publisher

University of Toledo

Year dc:date

2012

Author dc:creator

• Zhao, Jibo

Contributors dc:contributor

• Wang, Hong

• Computer Science
• Electrical Engineering
• Direct torque control
• fuzzy logic
• fuzzy switcher rules
• induction motor
• field weakening.

Statement dc:rights

• unrestricted
• This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.

Language dc:language

English

Repository record dc:identifier

http://rave.ohiolink.edu/etdc/view?acc_num=toledo1352922315

OAI identifier oai:identifier

oai:etd.ohiolink.edu:toledo1352922315