The Experts below are selected from a list of 3501 Experts worldwide ranked by ideXlab platform
S.s. Eaves - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of lithium-ion synergetic battery pAck as battery charger
IEEE Transactions on Energy Conversion, 1999Co-Authors: A. Davis, Ziyad M Salameh, S.s. EavesAbstract:A new battery configuration technique and Accompanying control circuitry, termed a synergetic battery pAck (SBP), is designed to work with lithium batteries, and can be used as both an inverter for an electric vehicle Ac Induction Motor drive and a battery charger. In this paper, the authors compare the performance of the synergetic battery pAck as a battery charger with several simple conventional battery charging circuits via computer simulation. The fActors of comparison were power fActor, harmonic distortion and circuit efficiency. The simulations showed that the SBP is superior to conventional charging circuits since the power fActor is unity and harmonic distortion is negligible.
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Comparison of a synergetic battery pAck drive system to a pulse width modulated Ac Induction Motor drive for an electric vehicle
IEEE Transactions on Energy Conversion, 1999Co-Authors: A. Davis, Ziyad M Salameh, S.s. EavesAbstract:A new battery configuration technique and Accompanying control circuitry, termed a synergetic battery pAck (SBP), is designed to work with lithium batteries, and can be used as both an inverter for an electric vehicle Ac Induction Motor drive and as a battery charger. In this paper, the performance of a synergetic battery pAck during Motor drive operation is compared via computer simulation with a conventional Motor drive which uses sinusoidal pulse width modulation (SPWM) to determine its effectiveness as a Motor drive. The study showed that the drive efficiency was compatible with the conventional system, and offered a significant advantage in the lower frequency operating ranges. The voltage total harmonic distortion (THD) of the SBP was significantly lower than the PWM drive output, but the current THD was slightly higher due to the shape of the harmonic spectrum. In conclusion, the SBP is an effective alternative to a conventional drive, but the real advantage lies in its battery management capabilities and charger operation.
A. Davis - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of lithium-ion synergetic battery pAck as battery charger
IEEE Transactions on Energy Conversion, 1999Co-Authors: A. Davis, Ziyad M Salameh, S.s. EavesAbstract:A new battery configuration technique and Accompanying control circuitry, termed a synergetic battery pAck (SBP), is designed to work with lithium batteries, and can be used as both an inverter for an electric vehicle Ac Induction Motor drive and a battery charger. In this paper, the authors compare the performance of the synergetic battery pAck as a battery charger with several simple conventional battery charging circuits via computer simulation. The fActors of comparison were power fActor, harmonic distortion and circuit efficiency. The simulations showed that the SBP is superior to conventional charging circuits since the power fActor is unity and harmonic distortion is negligible.
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Comparison of a synergetic battery pAck drive system to a pulse width modulated Ac Induction Motor drive for an electric vehicle
IEEE Transactions on Energy Conversion, 1999Co-Authors: A. Davis, Ziyad M Salameh, S.s. EavesAbstract:A new battery configuration technique and Accompanying control circuitry, termed a synergetic battery pAck (SBP), is designed to work with lithium batteries, and can be used as both an inverter for an electric vehicle Ac Induction Motor drive and as a battery charger. In this paper, the performance of a synergetic battery pAck during Motor drive operation is compared via computer simulation with a conventional Motor drive which uses sinusoidal pulse width modulation (SPWM) to determine its effectiveness as a Motor drive. The study showed that the drive efficiency was compatible with the conventional system, and offered a significant advantage in the lower frequency operating ranges. The voltage total harmonic distortion (THD) of the SBP was significantly lower than the PWM drive output, but the current THD was slightly higher due to the shape of the harmonic spectrum. In conclusion, the SBP is an effective alternative to a conventional drive, but the real advantage lies in its battery management capabilities and charger operation.
Sang Bong Kim - One of the best experts on this subject based on the ideXlab platform.
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application of servo controller design for speed control of Ac Induction Motors using polynomial differential operator
2016Co-Authors: Dae Hwan Kim, Phuc Thinh Doan, Pandu Sandi Pratama, Van Tu Duong, Jung Hu Min, Young Seok Jung, Sang Bong KimAbstract:This paper proposes a servo controller design method for speed control of Ac Induction Motors using polynomial differential operator. To do this task, the followings are done. First, nonlinear modeling for an Induction Motor is introduced and is linearized at equilibrium points using Taylor’s series. Second, an observer is designed to estimate flux, and an extended system incorporating the internal model principle to construct the extended system is shown using polynomial differential operator in case that the types of reference inputs are differential polynomials. Third, a state feedbAck control law for the extended system to trAck the given reference input is designed by a regulator design method. A control system is constructed for speed control of the 1.5 KW Ac Induction Motor. The simulation and experimental results are shown to verify the applicability of the proposed controller compared to conventional PI controller for the Ac Induction Motor with a step type of disturbance to trAck its speed of 3 types of the references such as step, ramp and parabola.
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Sensorless Vector Control of Ac Induction Motor Using Sliding-Mode Observer
International Journal of Science and Engineering, 2013Co-Authors: Phuc Thinh Doan, Tan Tien Nguyen, Sang Kwun Jeong, Sang Bong KimAbstract:This paper develops a sensorless vector controlled method for Ac Induction Motor using sliding-mode observer. For developing the control algorithm, modeling of Ac Induction Motor is presented. After that, a sliding mode observer is proposed to estimate the Motor speed, the rotor flux, the angular position of the rotor flux and the Motor torque from monitored stator voltages and currents. The use of the nonlinear sliding mode observer provides very good performance for both low and high speed Motor operation. Furthermore, the proposed system is robust in Motor losses and load variations. The convergence of the proposed observer is obtained using the Lyapunov theory. Hardware and software for simulation and experiment of the Ac Induction Motor drive are introduced. The hardware consists of a 1.5kw Ac Induction Motor connected in series with a torque sensor and a powder brake. A controller is developed based on DSP TMS320F28355. The simulation and experimental results illustrate that fast torque and speed response with small torque ripples can be Achieved. The proposed control scheme is suitable to the application fields that require high performance of torque response such as electric vehicles.
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ASCC - Sliding-mode observer design for sensorless vector control of Ac Induction Motor
2013 9th Asian Control Conference (ASCC), 2013Co-Authors: Phuc Thinh Doan, Thanh Luan Bui, Hak Kyeong Kim, Sang Bong KimAbstract:In this paper, a sliding-mode observer is applied to control an Ac Induction Motor. First, the modeling of Ac Induction Motor is presented. After that, a sliding mode observer is proposed to estimate the Motor speed, the rotor flux, the angular position of the rotor flux and the Motor torque from monitored stator voltages and currents. The proposed sliding mode observer provides very good performance for both low and high speed Motor operation. Furthermore, the proposed system is robust in Motor losses and load variations. The proposed observer does not uses complicated observer gains and it is easy to setup for different types of Motor. The convergence of the proposed observer is obtained using the Lyapunov theory. Hardware and software for experiment of the Ac Induction Motor drive are introduced. The experimental results illustrate that fast torque and speed response with small torque ripples can be Achieved. The proposed control scheme is suitable to the application fields that require high performance of torque response such as electric vehicles.
Ziyad M Salameh - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of lithium-ion synergetic battery pAck as battery charger
IEEE Transactions on Energy Conversion, 1999Co-Authors: A. Davis, Ziyad M Salameh, S.s. EavesAbstract:A new battery configuration technique and Accompanying control circuitry, termed a synergetic battery pAck (SBP), is designed to work with lithium batteries, and can be used as both an inverter for an electric vehicle Ac Induction Motor drive and a battery charger. In this paper, the authors compare the performance of the synergetic battery pAck as a battery charger with several simple conventional battery charging circuits via computer simulation. The fActors of comparison were power fActor, harmonic distortion and circuit efficiency. The simulations showed that the SBP is superior to conventional charging circuits since the power fActor is unity and harmonic distortion is negligible.
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Comparison of a synergetic battery pAck drive system to a pulse width modulated Ac Induction Motor drive for an electric vehicle
IEEE Transactions on Energy Conversion, 1999Co-Authors: A. Davis, Ziyad M Salameh, S.s. EavesAbstract:A new battery configuration technique and Accompanying control circuitry, termed a synergetic battery pAck (SBP), is designed to work with lithium batteries, and can be used as both an inverter for an electric vehicle Ac Induction Motor drive and as a battery charger. In this paper, the performance of a synergetic battery pAck during Motor drive operation is compared via computer simulation with a conventional Motor drive which uses sinusoidal pulse width modulation (SPWM) to determine its effectiveness as a Motor drive. The study showed that the drive efficiency was compatible with the conventional system, and offered a significant advantage in the lower frequency operating ranges. The voltage total harmonic distortion (THD) of the SBP was significantly lower than the PWM drive output, but the current THD was slightly higher due to the shape of the harmonic spectrum. In conclusion, the SBP is an effective alternative to a conventional drive, but the real advantage lies in its battery management capabilities and charger operation.
Pavel Vaclavek - One of the best experts on this subject based on the ideXlab platform.
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Ac Induction Motor control using robust current controllers
2011 IEEE Ninth International Conference on Power Electronics and Drive Systems, 2011Co-Authors: Petr Blaha, Pavel VaclavekAbstract:In the present work, the robust current controller design for Ac Induction Motor is addressed. It replAces current PI controllers in classical vector control algorithm where the controllers operate in coordinates fixed to rotor flux. Ac Induction Motor parameters are treated as parametric uncertainties. Their mutual dependencies are studied so as to simplify complex Ac Induction Motor state spAce description and to make the controller design using D-K iteration treatable. Imprecision in decoupling is partially treated. The newly designed controller is compared with the classical vector control algorithm.
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Adaptive deadbeat current controllers for Ac Induction Motor control
2008 IEEE 2nd International Power and Energy Conference, 2008Co-Authors: Petr Blaha, Pavel VaclavekAbstract:This paper presents employment of adaptive deadbeat current controllers in vector control scheme working in rotor flux coordinates. The parameter changes cause the deterioration of control performance in high precision Ac Induction Motor drives. The adaptive controllers with online identification keep the performance on a high level. On-line identification gives the estimate of the Motor parameters. This paper shows that deadbeat controllers can be easily tuned since their parameters directly depend on Ac Induction Motor parameters. The advantage is their fast response. The algorithm is not computationally intensive which makes it suitable for real time implementation in reasonable hardware.
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Ac Induction Motor Stator Resistance Estimation Algorithm
2007Co-Authors: Petr Blaha, Pavel VaclavekAbstract:Stator resistance identification algorithm for Ac Induction Motor is presented in th is paper. It does not require additional external excitation. The algorithm is intended to capture s low variations of stator resistance which are given by the changes in stator windings temperature. Steady state operation with harmonic voltages and currents are located during the operation of the Motor and the stator resistan ce is determined from RMS values of the voltage, current and from Actual Active power. Simulation experiments have proved the theoretical expectations. The algorithm is not computationally intensive which makes it suitable for real time implementation in reasonable hardware. The experimental results confirm that the proposed method gi ves Acceptable results on a real Motor. The disadvantage is the dependency of the stator resistance estimate on the level of magnetic flux excitation. The off line measurement of stator inductance on excitation current is proposed to solve this problem.
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lyapunov function based flux and speed observer for Ac Induction Motor sensorless control and parameters estimation
IEEE Transactions on Industrial Electronics, 2006Co-Authors: Pavel Vaclavek, P. BlahaAbstract:Ac Induction Motors have become very popular for motion-control applications due to their simple and reliable construction. Control of drives based on Ac Induction Motors is a quite complex task. Provided the vector-control algorithm is used, not only the rotor speed but also the position of the magnetic flux inside the Motor during the control process should be known. In most applications, the flux sensors are omitted and the magnetic-flux phasor position has to be calculated. However, there are also applications in which even speed sensors should be omitted. In such a situation, the task of state reconstruction can be solved only from voltage and current measurements. In the current paper, a method based on deterministic evaluation of measurement using the state observer based on the Lyapunov function is presented. The method has been proven in testing on a real Ac Induction mAchine.
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Predictive direct stator flux control algorithm of Ac Induction Motor in field weakening region
Second IEEE International Conference on Computational Cybernetics 2004. ICCC 2004., 1Co-Authors: P. Blaha, Pavel VaclavekAbstract:This paper presents possible usage of the predictive direct stator flux control (PDSFC) algorithm for stator flux oriented vector control of Ac Induction Motors in field weakening region. The required magnitude of the stator flux vector enters directly into PDSFC control scheme without requiring the flux controller. From this point of view it seems to be simple to extend it with algorithm for field weakening. This enables Ac Induction Motor to operate above nominal speed and also to Achieve nearly optimal efficiency
