Modeling and Experimental Verification of ANN Based Online Stator Resistance Estimation in DTC-IM Drive

Reza, C. M. F. S.; Islam, Didarul; Mekhilef, Saad

doi:10.5370/jeet.2014.9.2.550

Cited by 7 publications

(6 citation statements)

References 40 publications

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“…The geometric definition of the dot product is used to find the derivative of the amplitude of the stator flux vector, as in Eq. (19). Equation (20) is obtained by differentiating Eq.…”

Section: A Conventional Dtc For the Pmsgmentioning

confidence: 99%

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New application of predictive direct torque control in permanent magnet synchronous generator-based wind turbine

Yang

Lin

2015

Journal of Renewable and Sustainable Energy

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This paper concerns the application of the predictive direct torque control (PDTC) method to a permanent magnet synchronous generator (PMSG). In classical methods for controlling a PMSG, the sampling frequency of the controller must be precisely determined. However, the use of PDTC in this study enables three optimal duty cycles to be predicted at the moment of sampling, significantly reducing the ripple of the electromagnetic torque and the amplitude of the stator flux below those caused by conventional control methods. Therefore, the new method allows a lower sampling frequency than the traditional method. To operate the machine side converter, the DC bus capacitor voltage must be maintained within an acceptable and stable range. Voltage-oriented vector control is used to control the active power and the reactive power, which are delivered from the DC bus capacitor, as well as to control the voltage. In this study, a complete wind turbine system is considered, including a focus on the aerodynamics and structure of each wind turbine, using Fatigue, Aerodynamics, Structures and Turbulence (FAST). Also, to prevent the rotor speed of the wind turbine from exceeding the rated rotor speed too much, a very simple pitch controller system is considered. V C 2015 AIP Publishing LLC. [http://dx.

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“…The geometric definition of the dot product is used to find the derivative of the amplitude of the stator flux vector, as in Eq. (19). Equation (20) is obtained by differentiating Eq.…”

Section: A Conventional Dtc For the Pmsgmentioning

confidence: 99%

“…However, the resistance of the induction machine varies in response to the temperature during the operation. The observer and estimator have been developed 19,20 using modern nonlinear control methods, which make predictive direct torque control much more accurate when applied to PMSG.…”

Section: Introductionmentioning

confidence: 99%

New application of predictive direct torque control in permanent magnet synchronous generator-based wind turbine

Yang

Lin

2015

Journal of Renewable and Sustainable Energy

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“…Many methods have already been introduced to address this problem such as zero state modulation [8,9], space vector modulation (SVM) [2,8,10,11] and the application of multilevel inverter [4,5,[12][13][14][15][16][17]. These modified schemes generally provide better performance in terms of torque and flux smoothing with added switching losses and power circuit complexity.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Experimental Validation of 5-level Hybrid H-bridge Multilevel Inverter Fed DTC-IM Drive

Islam¹,

Reza²,

Mekhilef³

2015

Journal of Electrical Engineering and Technology

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-This paper aims to improve the performance of conventional direct torque control (DTC) drives proposed by Takahashi by extending the idea for 5-level inverter. Hybrid cascaded H-bridge topology is used to achieve inverter voltage vector composed of 5-level of voltage. Although DTC is very popular for its simplicity but it suffers from some disadvantages like-high torque ripple and uncontrollable switching frequency. To compensate these shortcomings conventional DTC strategy is modified for five levels voltage source inverter (VSI). Multilevel hysteresis controller for both flux and torque is used. Optimal voltage vector selection from precise lookup table utilizing 12 sector, 9 torque level and 4 flux level is proposed to improve DTC performance. These voltage references are produced utilizing a hybrid cascaded H-bridge multilevel inverter, where inverter each phase can be realized using multiple dc source. Fuel cells, car batteries or ultra-capacitor are normally the choice of required dc source. Simulation results shows that the DTC drive performance is considerably improved in terms of lower torque and flux ripple and less THD. These have been experimentally evaluated and compared with the basic DTC developed by Takahashi.

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“…Moreover, stator resistance value is required for a stator flux and electromotive force estimation. Its variations caused by changing temperature make operation difficult, mainly at low speed [30]. To overcome this problem, a reduced order extended Kalman filter (EKF) is proposed to update online the stator resistance [31].…”

Section: Introductionmentioning

confidence: 99%

New Adaptive Sliding-Mode Observer Design For Sensorless Control Of Pmsm In Electric Vehicle Drive System

Xiong

Zhang

Jing

et al. 2016

International Journal on Smart Sensing and Intelligent Systems

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Abstract-In this study, a new adaptive sliding-mode observer is proposed to estimate the rotor position and speed for sensorless control of permanent-magnet synchronous motor (PMSM) in an electric vehicle drive system. This observer can effectively reduce the estimation errors caused by the inherent chattering phenomenon for a conventional sliding-mode observer and the stator resistance uncertainty due to the variation of motor temperature. This new sliding-mode observer is designed by using a hyperbolic tangent function instead of sign function together with a variable boundary layer, and the new adaptive law is constructed according to the back electromotive force model to reinforce dynamic performance and the robustness of system. Meanwhile, a stator resistance identification algorithm is raised and guaranteed to be stable by using a Lyapunov method. The performance of the developed observer is compared with the conventional sliding-mode controller. Both simulation and experimental results confirm that the chattering phenomenon is effectively eliminated and the estimation accuracy for position and velocity is apparently improved when applying the developed observer in the electric vehicle drive system.

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Modeling and Experimental Verification of ANN Based Online Stator Resistance Estimation in DTC-IM Drive

Cited by 7 publications

References 40 publications

New application of predictive direct torque control in permanent magnet synchronous generator-based wind turbine

New application of predictive direct torque control in permanent magnet synchronous generator-based wind turbine

Modeling and Experimental Validation of 5-level Hybrid H-bridge Multilevel Inverter Fed DTC-IM Drive

New Adaptive Sliding-Mode Observer Design For Sensorless Control Of Pmsm In Electric Vehicle Drive System

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