Direct torque control - DTC

Schofield, John

doi:10.1049/ic:19951108

Cited by 27 publications

(4 citation statements)

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“…The basic principle of the CDTC is based on the application of a voltage particular sequence via a voltage inverter, whose waves are generated through hysteresis comparators in which the flux and torque are trapped to follow their references [20]. The components of the stator voltage vector in the stationary reference frame are calculated as follows:…”

Section: Cdtc Principlementioning

confidence: 99%

Design and Implementation of Direct Torque Control Based on an Intelligent Technique of Induction Motor on FPGA

Krim¹,

Gdaim²,

Mtibaa³

et al. 2015

Journal of Electrical Engineering and Technology

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In this paper the hardware implementation of the direct torque control based on the fuzzy logic technique of induction motor on the Field-Programmable Gate Array (FPGA) is presented. Due to its complexity, the fuzzy logic technique implemented on a digital system like the DSP (Digital Signal Processor) and microcontroller is characterized by a calculating delay. This delay is due to the processing speed which depends on the system complexity. The limitation of these solutions is inevitable. To solve this problem, an alternative digital solution is used, based on the FPGA, which is characterized by a fast processing speed, to take the advantage of the performances of the fuzzy logic technique in spite of its complex computation. The Conventional Direct Torque Control (CDTC) of the induction machine faces problems, like the high stator flux, electromagnetic torque ripples, and stator current distortions. To overcome the CDTC problems many methods are used such as the space vector modulation which is sensitive to the parameters variations of the machine, the increase in the switches inverter number which increases the cost of the inverter, and the artificial intelligence. In this paper an intelligent technique based on the fuzzy logic is used because it is allows controlling the systems without knowing the mathematical model. Also, we use a new method based on the Xilinx system generator for the hardware implementation of Direct Torque Fuzzy Control (DTFC) on the FPGA. The simulation results of the DTFC are compared to those of the CDTC. The comparison results illustrate the reduction in the torque and stator flux ripples of the DTFC and show the Xilinx Virtex V FPGA performances in terms of execution time.

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Section: Cdtc Principlementioning

confidence: 99%

Design and Implementation of Direct Torque Control Based on an Intelligent Technique of Induction Motor on FPGA

Krim¹,

Gdaim²,

Mtibaa³

et al. 2015

Journal of Electrical Engineering and Technology

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“…Since the first developments of direct torque control (DTC) concept [3], [4], it has been used in many ac drives applications [5]. This is thanks to its fast torque response and robustness against machine parameter variations.…”

Section: Introductionmentioning

confidence: 99%

A Fast Flux Search Controller for DTC Based Induction Motor Drives

Kaboli

Zlghadri

Emadi³

2005

2005 IEEE 36th Power Electronics Specialists Conference

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In this paper, a flux search controller is proposed to increase the efficiency of a direct torque controlled induction motor with light load. The reference flux value is determined through a two stage minimization algorithm with the amplitude of the stator current as the objective function. In the transient state, a great flux step is used to speed up the convergence. In the steady state, a noise cancellation algorithm is used to let using small flux step and improves the steady state behavior of flux controller. Simulation and experimental confirm the fast dynamics of the proposed method and its superiority compared to the other optimal flux search controllers. 739 0-7803-9033

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“…Direct torque control (DTC) is now a universally accepted technique for controlling drive systems [1], [2]. This is thanks to its fast torque response and its robustness against the variation of machine parameters.…”

Section: Introductionmentioning

confidence: 99%

on the Performance of Optimal Flux Search Controller for DTC Based Induction Motor Drives

Kaboli

Vahdati-Khajeh

Zolghadri

et al. 2005

IEEE International Conference on Electric Machines and Drives, 2005.

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Application of a flux search controller in direct torque control of induction motor drives produces divergence problem and steady state flux ripple, because of the disturbance in the control loop. In this paper, an investigation about the origin of this noise has been performed. It is shown that the variation of voltage harmonics is the main reason of disturbance in the flux control loop. The minimum allowable value of flux step has been determined based on this analysis to prevent the divergence problem. Feasibility of noise cancellation has been discussed. Experimental results are presented to justify the theoretical analysis.

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Direct torque control - DTC

Cited by 27 publications

References 0 publications

Design and Implementation of Direct Torque Control Based on an Intelligent Technique of Induction Motor on FPGA

Design and Implementation of Direct Torque Control Based on an Intelligent Technique of Induction Motor on FPGA

A Fast Flux Search Controller for DTC Based Induction Motor Drives

on the Performance of Optimal Flux Search Controller for DTC Based Induction Motor Drives

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