A scheme of fuzzy direct torque control for induction machine

Chen, Lin; Fang, Kangling; Hu, Zifan

doi:10.1109/icmlc.2005.1527053

Cited by 16 publications

(2 citation statements)

References 7 publications

(7 reference statements)

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“…Common disadvantages of the conventional DTC are high torque ripple and slow transient response to the step changes in torque during start-up. Several technique have been developed to improved the torque performance [5][6][7][8][9][10]. In classical DTC induction motor drive there are torque and flux ripples because none of the inverter switching vectors is able to produce the desired changes in both torque and stator flux.…”

Section: Introductionmentioning

confidence: 99%

Minimization of Torque Ripple in DTC of Induction Motor Using Fuzzy Mode Duty Cycle Controller

Abdalla¹,

Hairik²,

Dakhil³

2011

IJEEE

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Among all control methods for induction motor drives, Direct Torque Control (DTC) seems to be particularly interesting being independent of machine rotor parameters and requiring no speed or position sensors. The DTC scheme is characterized by the absence of PI regulators, coordinate transformations, current regulators and PWM signals generators. In spite of its simplicity, DTC allows a good torque control in steady state and transient operating conditions to be obtained. However, the presence of hysterics controllers for flux and torque could determine torque and current ripple and variable switching frequency operation for the voltage source inverter. This paper is aimed to analyze DTC principles, and the problems related to its implementation, especially the torque ripple and the possible improvements to reduce this torque ripple by using a proposed fuzzy based duty cycle controller. The effectiveness of the duty ratio method was verified by simulation using Matlab/Simulink software package. The results are compared with that of the traditional DTC models.

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Section: Introductionmentioning

confidence: 99%

Minimization of Torque Ripple in DTC of Induction Motor Using Fuzzy Mode Duty Cycle Controller

Abdalla¹,

Hairik²,

Dakhil³

2011

IJEEE

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“…A lógica fuzzy tem provado ser bastante eficiente no controle de motores utilizando a estratégia de controle direto de torque, por exemplo, em (Abu-Rub et al 2004), o controlador PI e o controlador fuzzy foram usados para controlar o ângulo de carga, simplificando assim o sistema de acionamento do MIT. Em (Chen et al 2005), o controlador fuzzy foi usado para obter dinamicamente o vetor de referência da tensão do estator em função do erro do torque, do erro do fluxo do estator e de seu ângulo. Nesse caso, as ondulações do torque e do fluxo diminuem.…”

Section: Revisão Bibliográficaunclassified

Estratégias de controle direto de torque para motores de indução trifásicos usando controladores fuzzy tipo Takagi-Sugeno e controladores por modos deslizantes

Azcue¹,

Filho²

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This thesis proposes a direct field oriented control (D-FOC) and direct torque control (DTC) strategies with Takagi-Sugeno fuzzy controllers (T-S fuzzy). Also it proposes a DTC strategy based on load angle control with the use of sliding mode control (DTC-SMC). The proposed vector control strategies are used for high performance control of three-phase induction motor. The proposed T-S fuzzy controller uses a single rule base to generate the direct-axis and quadrature-axis components of the stator voltage space vector. This simplifies the structure of the T-S fuzzy controller and consequently it reduces the computational cost and its processing time. However, in the sliding mode control the control effort is always the maximum possible in order to reduce the errors of the torque and the flux. Hence, it is possible to get a fast response in the control of the torque and the flux. The proposed controllers showed a good dynamic performance because the references were achieved. The experimental and simulation results of the vector control strategies were presented to validate the proposed controllers. All the obtained results were consistent with the results reported in the literature, validating the proposed DTC and D-FOC strategies.

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Novel torque ripple minimization algorithm for direct torque control of induction motor drive

Liu

Guo

Hao

et al. 2009

J. Shanghai Univ.(Engl. Ed.)

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To elucidate the principles of notable torque and flux ripple during the steady state of the conventional direct torque control (DTC) of induction machines, the factors of influence torque variation are examined. A new torque ripple minimization algorithm is proposed. The novel method eradicated the torque ripple by imposing the required stator voltage vector in each control cycle. The M and T axial components of the stator voltage are accomplished by measuring the stator flux error and the expected incremental value of the torque at every sampling time. The maximum angle rotation allowed is obtained. Experimental results showed that the proposed method combined with the space vector pulse width modulation (SVPWM) could be implemented in most existing digital drive controllers, offering high performance in both steady and transient states of the induction drives at full speed range. The result of the present work implies that torque fluctuation could be eliminated by imposing proper stator voltage, and the proposed scheme could not only maintain constant switching frequency for the inverter, but also solve the heating problem and current harmonics in traditional induction motor drives.

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A scheme of fuzzy direct torque control for induction machine

Cited by 16 publications

References 7 publications

Minimization of Torque Ripple in DTC of Induction Motor Using Fuzzy Mode Duty Cycle Controller

Minimization of Torque Ripple in DTC of Induction Motor Using Fuzzy Mode Duty Cycle Controller

Estratégias de controle direto de torque para motores de indução trifásicos usando controladores fuzzy tipo Takagi-Sugeno e controladores por modos deslizantes

Novel torque ripple minimization algorithm for direct torque control of induction motor drive

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