Yazar "Sanjeevikumar, P." seçeneğine göre listele

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    Speed sensorless vector control of parallel-connected three-phase two-motor single-inverter drive system
    (Canadian Science Publishing, Nrc Research Press, 2016) Gunabalan, R.; Sanjeevikumar, P.; Blaabjerg, Frede; Wheeler, Patrick W.; Ojo, Olorunfemi; Ertas, Ahmet H.
    This paper presents the characteristic behavior of direct vector control of two induction motors with sensorless speed feedback having the same rating parameters, paralleled combination, and supplied from a single current-controlled pulse-width-modulated voltage-source inverter drive. Natural observer design technique is known for its simple construction, which estimates the speed and rotor fluxes. Load torque is estimated by load torque adaptation and the average rotor flux was maintained constant by rotor flux feedback control. The technique's convergence rate is very fast and is robust to noise and parameter uncertainty. The gain matrix is absent in the natural observer. The rotor speed is estimated from the load torque, stator current, and rotor flux. Under symmetrical load conditions, the difference in speed between two induction motors is reduced by considering the motor parameters as average and difference. Rotor flux is maintained constant by the rotor flux control scheme with feedback, and the estimation of rotor angle is carried out by the direct vector control technique. Both balanced and unbalanced load conditions are investigated for the proposed AC motor drive system. Experimental results presented in this paper show good agreement with the theoretical formulations.
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    Transfer Function Modeling of Parallel Connected Two Three-Phase Induction Motor Implementation Using LabView Platform
    (Ieee, 2015) Gunabalan, R.; Sanjeevikumar, P.; Blaabjerg, Frede; Wheeler, Patrick W.; Fedak, Viliam; Ertas, Ahmet H.
    This paper presents the transfer function modeling and stability analysis of two induction motors of same ratings and parameters connected in parallel. The induction motors are controlled by a single inverter and the entire drive system is modeled using transfer function in LabView. Further, the software is used to perform the stability analysis of the parallel connected induction motor drive under unbalanced load conditions. It is very simple compared with the methods discussed so far to study the performance of the drive under unbalanced load conditions. Control design and simulation toolkits are used to model the drive system and to study the stability analysis. Simulation is done for various operating conditions and the stability investigation is performed for different load conditions and difference in stator and rotor resistances among the two motors.
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    Transfer function modeling of parallel connected two three-phase induction motor implementation using LabView platform
    (Institute of Electrical and Electronics Engineers Inc., 2015) Gunabalan, R.; Sanjeevikumar, P.; Blaabjerg, F.; Wheeler, P.W.; Fedak, V.; Ertas, A.H.
    This paper presents the transfer function modeling and stability analysis of two induction motors of same ratings and parameters connected in parallel. The induction motors are controlled by a single inverter and the entire drive system is modeled using transfer function in LabView. Further, the software is used to perform the stability analysis of the parallel connected induction motor drive under unbalanced load conditions. It is very simple compared with the methods discussed so far to study the performance of the drive under unbalanced load conditions. Control design and simulation toolkits are used to model the drive system and to study the stability analysis. Simulation is done for various operating conditions and the stability investigation is performed for different load conditions and difference in stator and rotor resistances among the two motors. © 2015 IEEE.