Implementation of direct torque control of induction machines utilizing Digital Signal Processor (DSP) and Field Programmable Gate Arrays (FPGA)

This thesis presents the implementation of a high performance Direct Torque Control (DTC) of induction machine (IM) drives. A summary of the theoretical aspects and principles of DTC are given with emphasis on two major problems, i.e. high torque ripple and variable switching frequency. In order to...

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Main Author:	Toh, Chuen Ling
Format:	Thesis
Language:	English
Published:	2005
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/4195/1/TohChuenLingMFKE2005.pdf
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id	my-utm-ep.4195
record_format	uketd_dc
spelling	my-utm-ep.41952018-01-16T03:45:21Z Implementation of direct torque control of induction machines utilizing Digital Signal Processor (DSP) and Field Programmable Gate Arrays (FPGA) 2005-05 Toh, Chuen Ling TK Electrical engineering. Electronics Nuclear engineering This thesis presents the implementation of a high performance Direct Torque Control (DTC) of induction machine (IM) drives. A summary of the theoretical aspects and principles of DTC are given with emphasis on two major problems, i.e. high torque ripple and variable switching frequency. In order to solve these problems, this thesis proposed a pair of torque and flux controllers to replace the hysteresis-based controllers. The proposed torque controller consists of a PI controller, 2 triangular carrier generators and a pair of comparator. It produces three level output, namely â€“1, 0, and 1, which is similar to the three level hysteresis comparator. The proposed flux controller works similar to the torque controller and consists of a proportional controller, a single triangular carrier generator and a comparator. The output is switched between 1 and 0 similar to the two-level hysteresis comparator. The design of these controllers is thoroughly discussed and is applied to a Â¼ HP squirrel cage IM. The simulation of the proposed controllers applied to the DTC drive is presented. The simulation results are then verified by experimental results. The main components of the hardware are implemented using DSP TMS320C31 and Altera FPGA devices. The DSP is used to estimate the torque and flux while the FPGA is responsible in generating the triangular carriers, selecting the appropriate voltage vectors and generating the blanking time for the 3-phase VSI. The results prove that 80% of torque ripple reduction is obtained while the stator flux ripples also manage to achieve 57% of reduction. Furthermore, the switching frequency is fixed at 10.4 kHz and a smoother sinusoidal phase current is obtained. 2005-05 Thesis http://eprints.utm.my/id/eprint/4195/ http://eprints.utm.my/id/eprint/4195/1/TohChuenLingMFKE2005.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Electrical Engineering Faculty of Electrical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TK Electrical engineering Electronics Nuclear engineering
spellingShingle	TK Electrical engineering Electronics Nuclear engineering Toh, Chuen Ling Implementation of direct torque control of induction machines utilizing Digital Signal Processor (DSP) and Field Programmable Gate Arrays (FPGA)
description	This thesis presents the implementation of a high performance Direct Torque Control (DTC) of induction machine (IM) drives. A summary of the theoretical aspects and principles of DTC are given with emphasis on two major problems, i.e. high torque ripple and variable switching frequency. In order to solve these problems, this thesis proposed a pair of torque and flux controllers to replace the hysteresis-based controllers. The proposed torque controller consists of a PI controller, 2 triangular carrier generators and a pair of comparator. It produces three level output, namely â€“1, 0, and 1, which is similar to the three level hysteresis comparator. The proposed flux controller works similar to the torque controller and consists of a proportional controller, a single triangular carrier generator and a comparator. The output is switched between 1 and 0 similar to the two-level hysteresis comparator. The design of these controllers is thoroughly discussed and is applied to a Â¼ HP squirrel cage IM. The simulation of the proposed controllers applied to the DTC drive is presented. The simulation results are then verified by experimental results. The main components of the hardware are implemented using DSP TMS320C31 and Altera FPGA devices. The DSP is used to estimate the torque and flux while the FPGA is responsible in generating the triangular carriers, selecting the appropriate voltage vectors and generating the blanking time for the 3-phase VSI. The results prove that 80% of torque ripple reduction is obtained while the stator flux ripples also manage to achieve 57% of reduction. Furthermore, the switching frequency is fixed at 10.4 kHz and a smoother sinusoidal phase current is obtained.
format	Thesis
qualification_level	Master's degree
author	Toh, Chuen Ling
author_facet	Toh, Chuen Ling
author_sort	Toh, Chuen Ling
title	Implementation of direct torque control of induction machines utilizing Digital Signal Processor (DSP) and Field Programmable Gate Arrays (FPGA)
title_short	Implementation of direct torque control of induction machines utilizing Digital Signal Processor (DSP) and Field Programmable Gate Arrays (FPGA)
title_full	Implementation of direct torque control of induction machines utilizing Digital Signal Processor (DSP) and Field Programmable Gate Arrays (FPGA)
title_fullStr	Implementation of direct torque control of induction machines utilizing Digital Signal Processor (DSP) and Field Programmable Gate Arrays (FPGA)
title_full_unstemmed	Implementation of direct torque control of induction machines utilizing Digital Signal Processor (DSP) and Field Programmable Gate Arrays (FPGA)
title_sort	implementation of direct torque control of induction machines utilizing digital signal processor (dsp) and field programmable gate arrays (fpga)
granting_institution	Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department	Faculty of Electrical Engineering
publishDate	2005
url	http://eprints.utm.my/id/eprint/4195/1/TohChuenLingMFKE2005.pdf
_version_	1747814501775835136

Implementation of direct torque control of induction machines utilizing Digital Signal Processor (DSP) and Field Programmable Gate Arrays (FPGA)

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