The Experts below are selected from a list of 249 Experts worldwide ranked by ideXlab platform
A K Chattopadhyay - One of the best experts on this subject based on the ideXlab platform.
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A Simplified Analytical Averaged Model of a Thyristorized Commutatorless Series Motor
IEEE Transactions on Industry Applications, 2006Co-Authors: Kaushik Mukherjee, S. Sengupta, A K Chattopadhyay, T.k. Bhattacharya, S.n. BhadraAbstract:This paper proposes a simplified analytical averaged model of a thyristorized commutatorless Series Motor. The Motor operation is generally complicated due to the complexities present in the three-phase synchronous machine used and the nonlinearities introduced by the switching operation of the power electronic converter that is feeding the electrical machine. The simple analytical model is formulated in light of a conventional dc Series Motor and is found to be approaching the simplicity of a conventional dc Series Motor both in dynamic condition and steady state. The developed simplified model is found to yield results closely tallying with those obtained from a "detailed numerical model" developed earlier, which is totally numerical in nature. The results are also validated experimentally on a small laboratory-built prototype. The developed model lays the foundation of controlling the Motor for different industrial loading applications. One such application, viz., constant torque loading, is considered to show that the control strategy adopted on the basis of the discussed model works satisfactorily to develop a constant torque according to a given torque reference irrespective of load disturbances
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Simplified Analytical Averaged Model of a Thyristorized Commutatorless Series Motor
2005 International Conference on Power Electronics and Drives Systems, 2005Co-Authors: Kaushik Mukherjee, S. Sengupta, A K Chattopadhyay, T.k. Bhattacharya, S.n. BhadraAbstract:This paper proposes a simplified analytical averaged model of a thyristorized commutatorless Series Motor (CLSM). The Motor operation is generally complicated due to the complexities present in the three phase synchronous machine used and the non-linearities introduced by the switching operation of the power electronic converter, feeding the electrical machine. The simple analytical model is formulated in the light of a conventional DC Series Motor and is found to be approaching the simplicity of a conventional DC Series Motor, both in dynamic condition and steady state. The developed simplified model is found to yield results; closely tallying with those obtained from a 'detailed numerical model', developed earlier, which is totally numerical in nature. The results are also validated experimentally on a small laboratory-built prototype. The developed model lays the foundation of controlling the Motor for different industrial loading applications. One such application, viz. constant torque loading is considered in this paper to show that the control strategy adopted on the basis of the discussed model works satisfactorily to develop a constant torque according to a given torque reference, irrespective of load disturbances
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Development of Closed Loop Control Schemes for Constant Speed Operation of a Thyristorized Commutatorless Series Motor Drive
2005 International Conference on Power Electronics and Drives Systems, 2005Co-Authors: Kaushik Mukherjee, S. Sengupta, T.k. Bhattacharya, A K ChattopadhyayAbstract:This paper presents the development of closed loop control schemes for constant speed mode operation of a thyristorized commutatorless Series Motor (CLSM) drive. Constant speed mode of operation of electrical drives with closed loop control is commonly required to be realized in most practical industrial drive applications. Two control schemes, one using only a speed loop and the other using an outer speed loop and an inner current loop, as are generally done with standard drives, are separately studied for this unconventional machine. The strategies are tested for different controller settings after simulating the entire speed-controlled drive, utilizing the analytical model. The simulation results are presented. An analytical guideline has been proposed to provide a starting point for designing stable speed and current controllers. The discussed schemes are finally implemented in the laboratory on a small prototype and experimental results are presented.
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Constant power operation of a thyristorized commutatorless Series Motor
2005 International Conference on Electrical Machines and Systems, 2005Co-Authors: Kaushik Mukherjee, S. Sengupta, T.k. Bhattacharya, A K ChattopadhyayAbstract:Constant power control of drives in general, like constant torque control, is often required in practical industrial applications. This paper describes the constant power operation of a thyristorized commutatorless Series Motor (CLSM), which is expected to be competitive for high power (MW ranges), normal speed (1500-3000 r/min) applications. The basic thyristorized CLSM drive, developed in recent past S. SenGupta, et al (2000) is described first along with its simplified analytical model K. Mukherjee, et al (2005). Described next is the system for achieving constant power control of this basic CLSM, where it is operated in conjunction with a front-end thyristorized rectifier. A suitable PI controller controls the front-end rectifier for achieving the constant power operation. The overall drive, including the basic CLSM, the front-end thyristorized rectifier and the respective controller, is modeled and simulated for predicting the performances. The simplified analytical model of the basic CLSM (K. Mukherjee, et al 2005) is utilized to model the overall drive and also for tuning of controller parameters. The discussed scheme is finally implemented in the laboratory and experimental results are validated with the simulation results.
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Simplified steady-state model of an SCR-inverter-based load-commutated commutatorless Series Motor
IEEE Power & Energy Magazine, 2002Co-Authors: Kaushik Mukherjee, S. Sengupta, T.k. Bhattacharya, A K ChattopadhyayAbstract:This paper presents a simplified analytical model of a silicon-controlled-rectifier based, load-commutated inverter driven, commutatorless Series Motor to predict its speed-current, torque-current and torque-speed characteristics. The model has been formulated, keeping in view the steady state equivalent circuit of a conventional DC Series Motor. The proposed analytical expressions relating torque and current with speed are found to follow an inverse law and that relating torque and current is found to be parabolic, as is expected in a "Series" machine. The drive has been implemented, loaded with a DC generator and experimentally similar characteristics have been obtained, as predicted by the analytical model. The characteristics obtained experimentally are seen to follow the ones, predicted by the analytical model closely.
Jean-pierre Barbot - One of the best experts on this subject based on the ideXlab platform.
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Step-by-step super-twisting observer for DC Series Motor in the presence of magnetic saturation
Recent Trends in Sliding Mode Control, 2016Co-Authors: Leonardo Amet, Malek Ghanes, Jean-pierre Barbot, G. SantomennaAbstract:DC Series Motors produce very high torque at zero or low speed. It is for this reason and its simplicity these Motors can still be found in oil drilling applications, among others. In oil drilling, the environment can be very harsh, leading to violent vibrations and shocks. Position sensors, needed to perform closed-loop speed or position control, can break easily under these conditions, causing production losses. Moreover, they increase the complexity and cost of the system. Therefore, it is desirable to avoid them. In this work, we propose the use of a step-by-step super twisting observer in order to determine the speed of the Motor. These observers have the property of finite time convergence. However, two inherent properties of DC Series Motors could make the use of observers impossible. On one hand, there exists an observability singularity at zero current. On the other hand, there is the magnetic saturation which leads to incorrect speed observation if not taken into account. To overcome these limitations, we propose the use of an observer/estimator scheme and introduce the magnetic saturation into the observer model.An industrial application is conducted to highlight the performance of the proposed solution in the context of a sensorless speed control of a DC Series Motor.
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ALCOSP - Super Twisting based step-by-step observer for a DC Series Motor
IFAC Proceedings Volumes, 2016Co-Authors: Leonardo Amet, Malek Ghanes, Jean-pierre BarbotAbstract:Abstract In this paper, a super twisting based step-by-step observer for a DC Series Motor is proposed. In this context, an observability analysis is performed, revealing an observability singularity at zero current. In order to overcome this problem we propose the joint use of an estimator and an observer. The entire system is validated, by means of simulations, in the context of a sensorless speed control.
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Step-by-step super-twisting observer for DC Series Motor in presence of magnetic saturation : an industrial application
2015Co-Authors: Leonardo Amet, Malek Ghanes, G. Santomenna, Jean-pierre BarbotAbstract:DC Series Motors produce very high torque at zero or low speed. It is for this reason and its simplicity that these Motors can still be found in oil drilling applications, among others. In oil drilling, the environment can be very harsh, leading to violent vibrations and shocks. Position sensors, needed to perform closed loop speed or position control, can break easily under these conditions, causing production losses. Moreover, they increase the complexity and cost of the system. Therefore, it is desirable to avoid them. In this work, we propose the use of a step-by-step super twisting observer in order to determine the speed of the Motor. These observers have the property of finite time convergence. However, two inherent properties of DC Series Motors could make the use of observers impossible. On the one hand, there exists an observability singularity at zero current. On the other hand, there is the magnetic saturation which leads to incorrect speed observation if not taken into account. To overcome these limitations, we propose the use of an observer/estimator scheme and introduce the magnetic saturation into the observer model. An industrial application is conducted to highlight the performance of the proposed solution in the context of a sensorless speed control of a DC Series Motor.
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CCA - Super Twisting based step-by-step observer for a DC Series Motor: Experimental results
2013 IEEE International Conference on Control Applications (CCA), 2013Co-Authors: Leonardo Amet, Malek Ghanes, Jean-pierre BarbotAbstract:A Super Twisting based step-by-step observer for a DC Series Motor is proposed. An observability analysis reveals that the system presents an observability singularity at zero current. To overcome this problem we propose the joint use of an estimator and an observer. Experimental results highlight the performances of the proposed observer/estimator in the context of a sensorless speed control.
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Sensorless control of a DC Series Motor
2013Co-Authors: Leonardo Amet, Malek Ghanes, Jean-pierre BarbotAbstract:In this paper a sensorless speed control for a DC Series Motor is presented. In this context, an observability analysis is performed, revealing that the system is inobservable at zero current. In order to overcome this problem we propose the joint use of an estimator and an observer, the latter being based on second order sliding modes techniques. The simulation results highlight the good performance of the proposed control.
Leonardo Amet - One of the best experts on this subject based on the ideXlab platform.
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Step-by-step super-twisting observer for DC Series Motor in the presence of magnetic saturation
Recent Trends in Sliding Mode Control, 2016Co-Authors: Leonardo Amet, Malek Ghanes, Jean-pierre Barbot, G. SantomennaAbstract:DC Series Motors produce very high torque at zero or low speed. It is for this reason and its simplicity these Motors can still be found in oil drilling applications, among others. In oil drilling, the environment can be very harsh, leading to violent vibrations and shocks. Position sensors, needed to perform closed-loop speed or position control, can break easily under these conditions, causing production losses. Moreover, they increase the complexity and cost of the system. Therefore, it is desirable to avoid them. In this work, we propose the use of a step-by-step super twisting observer in order to determine the speed of the Motor. These observers have the property of finite time convergence. However, two inherent properties of DC Series Motors could make the use of observers impossible. On one hand, there exists an observability singularity at zero current. On the other hand, there is the magnetic saturation which leads to incorrect speed observation if not taken into account. To overcome these limitations, we propose the use of an observer/estimator scheme and introduce the magnetic saturation into the observer model.An industrial application is conducted to highlight the performance of the proposed solution in the context of a sensorless speed control of a DC Series Motor.
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ALCOSP - Super Twisting based step-by-step observer for a DC Series Motor
IFAC Proceedings Volumes, 2016Co-Authors: Leonardo Amet, Malek Ghanes, Jean-pierre BarbotAbstract:Abstract In this paper, a super twisting based step-by-step observer for a DC Series Motor is proposed. In this context, an observability analysis is performed, revealing an observability singularity at zero current. In order to overcome this problem we propose the joint use of an estimator and an observer. The entire system is validated, by means of simulations, in the context of a sensorless speed control.
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Step-by-step super-twisting observer for DC Series Motor in presence of magnetic saturation : an industrial application
2015Co-Authors: Leonardo Amet, Malek Ghanes, G. Santomenna, Jean-pierre BarbotAbstract:DC Series Motors produce very high torque at zero or low speed. It is for this reason and its simplicity that these Motors can still be found in oil drilling applications, among others. In oil drilling, the environment can be very harsh, leading to violent vibrations and shocks. Position sensors, needed to perform closed loop speed or position control, can break easily under these conditions, causing production losses. Moreover, they increase the complexity and cost of the system. Therefore, it is desirable to avoid them. In this work, we propose the use of a step-by-step super twisting observer in order to determine the speed of the Motor. These observers have the property of finite time convergence. However, two inherent properties of DC Series Motors could make the use of observers impossible. On the one hand, there exists an observability singularity at zero current. On the other hand, there is the magnetic saturation which leads to incorrect speed observation if not taken into account. To overcome these limitations, we propose the use of an observer/estimator scheme and introduce the magnetic saturation into the observer model. An industrial application is conducted to highlight the performance of the proposed solution in the context of a sensorless speed control of a DC Series Motor.
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CCA - Super Twisting based step-by-step observer for a DC Series Motor: Experimental results
2013 IEEE International Conference on Control Applications (CCA), 2013Co-Authors: Leonardo Amet, Malek Ghanes, Jean-pierre BarbotAbstract:A Super Twisting based step-by-step observer for a DC Series Motor is proposed. An observability analysis reveals that the system presents an observability singularity at zero current. To overcome this problem we propose the joint use of an estimator and an observer. Experimental results highlight the performances of the proposed observer/estimator in the context of a sensorless speed control.
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Sensorless control of a DC Series Motor
2013Co-Authors: Leonardo Amet, Malek Ghanes, Jean-pierre BarbotAbstract:In this paper a sensorless speed control for a DC Series Motor is presented. In this context, an observability analysis is performed, revealing that the system is inobservable at zero current. In order to overcome this problem we propose the joint use of an estimator and an observer, the latter being based on second order sliding modes techniques. The simulation results highlight the good performance of the proposed control.
S. Sengupta - One of the best experts on this subject based on the ideXlab platform.
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A Simplified Analytical Averaged Model of a Thyristorized Commutatorless Series Motor
IEEE Transactions on Industry Applications, 2006Co-Authors: Kaushik Mukherjee, S. Sengupta, A K Chattopadhyay, T.k. Bhattacharya, S.n. BhadraAbstract:This paper proposes a simplified analytical averaged model of a thyristorized commutatorless Series Motor. The Motor operation is generally complicated due to the complexities present in the three-phase synchronous machine used and the nonlinearities introduced by the switching operation of the power electronic converter that is feeding the electrical machine. The simple analytical model is formulated in light of a conventional dc Series Motor and is found to be approaching the simplicity of a conventional dc Series Motor both in dynamic condition and steady state. The developed simplified model is found to yield results closely tallying with those obtained from a "detailed numerical model" developed earlier, which is totally numerical in nature. The results are also validated experimentally on a small laboratory-built prototype. The developed model lays the foundation of controlling the Motor for different industrial loading applications. One such application, viz., constant torque loading, is considered to show that the control strategy adopted on the basis of the discussed model works satisfactorily to develop a constant torque according to a given torque reference irrespective of load disturbances
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Simplified Analytical Averaged Model of a Thyristorized Commutatorless Series Motor
2005 International Conference on Power Electronics and Drives Systems, 2005Co-Authors: Kaushik Mukherjee, S. Sengupta, A K Chattopadhyay, T.k. Bhattacharya, S.n. BhadraAbstract:This paper proposes a simplified analytical averaged model of a thyristorized commutatorless Series Motor (CLSM). The Motor operation is generally complicated due to the complexities present in the three phase synchronous machine used and the non-linearities introduced by the switching operation of the power electronic converter, feeding the electrical machine. The simple analytical model is formulated in the light of a conventional DC Series Motor and is found to be approaching the simplicity of a conventional DC Series Motor, both in dynamic condition and steady state. The developed simplified model is found to yield results; closely tallying with those obtained from a 'detailed numerical model', developed earlier, which is totally numerical in nature. The results are also validated experimentally on a small laboratory-built prototype. The developed model lays the foundation of controlling the Motor for different industrial loading applications. One such application, viz. constant torque loading is considered in this paper to show that the control strategy adopted on the basis of the discussed model works satisfactorily to develop a constant torque according to a given torque reference, irrespective of load disturbances
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Development of Closed Loop Control Schemes for Constant Speed Operation of a Thyristorized Commutatorless Series Motor Drive
2005 International Conference on Power Electronics and Drives Systems, 2005Co-Authors: Kaushik Mukherjee, S. Sengupta, T.k. Bhattacharya, A K ChattopadhyayAbstract:This paper presents the development of closed loop control schemes for constant speed mode operation of a thyristorized commutatorless Series Motor (CLSM) drive. Constant speed mode of operation of electrical drives with closed loop control is commonly required to be realized in most practical industrial drive applications. Two control schemes, one using only a speed loop and the other using an outer speed loop and an inner current loop, as are generally done with standard drives, are separately studied for this unconventional machine. The strategies are tested for different controller settings after simulating the entire speed-controlled drive, utilizing the analytical model. The simulation results are presented. An analytical guideline has been proposed to provide a starting point for designing stable speed and current controllers. The discussed schemes are finally implemented in the laboratory on a small prototype and experimental results are presented.
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Constant power operation of a thyristorized commutatorless Series Motor
2005 International Conference on Electrical Machines and Systems, 2005Co-Authors: Kaushik Mukherjee, S. Sengupta, T.k. Bhattacharya, A K ChattopadhyayAbstract:Constant power control of drives in general, like constant torque control, is often required in practical industrial applications. This paper describes the constant power operation of a thyristorized commutatorless Series Motor (CLSM), which is expected to be competitive for high power (MW ranges), normal speed (1500-3000 r/min) applications. The basic thyristorized CLSM drive, developed in recent past S. SenGupta, et al (2000) is described first along with its simplified analytical model K. Mukherjee, et al (2005). Described next is the system for achieving constant power control of this basic CLSM, where it is operated in conjunction with a front-end thyristorized rectifier. A suitable PI controller controls the front-end rectifier for achieving the constant power operation. The overall drive, including the basic CLSM, the front-end thyristorized rectifier and the respective controller, is modeled and simulated for predicting the performances. The simplified analytical model of the basic CLSM (K. Mukherjee, et al 2005) is utilized to model the overall drive and also for tuning of controller parameters. The discussed scheme is finally implemented in the laboratory and experimental results are validated with the simulation results.
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Simplified steady-state model of an SCR-inverter-based load-commutated commutatorless Series Motor
IEEE Power & Energy Magazine, 2002Co-Authors: Kaushik Mukherjee, S. Sengupta, T.k. Bhattacharya, A K ChattopadhyayAbstract:This paper presents a simplified analytical model of a silicon-controlled-rectifier based, load-commutated inverter driven, commutatorless Series Motor to predict its speed-current, torque-current and torque-speed characteristics. The model has been formulated, keeping in view the steady state equivalent circuit of a conventional DC Series Motor. The proposed analytical expressions relating torque and current with speed are found to follow an inverse law and that relating torque and current is found to be parabolic, as is expected in a "Series" machine. The drive has been implemented, loaded with a DC generator and experimentally similar characteristics have been obtained, as predicted by the analytical model. The characteristics obtained experimentally are seen to follow the ones, predicted by the analytical model closely.
Samih Al Jabi - One of the best experts on this subject based on the ideXlab platform.
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Testing the Performances of DC Series Motor Used in Electric Car
Energy Procedia, 2015Co-Authors: Zeina Bitar, Abbas Sandouk, Samih Al JabiAbstract:By using a laboratory test desk built specially to test DC Series Motor and 3-phase IM, several practical tests could be performed. This desk include the electric Motor, an electronic controller and Battery Bank with a charger, enabling the practically verification of performance and behaviour of the complete electric drive system, which contains the exact parts that would be proposed to use in converting a diesel- or petrol-powered vehicle to an electric car. The resistive loads of the car were simulated using a synchronous generator with a variable electric resistive load driven by the tested Motor. The tests were carried on DC Series Motor with special design and construction suitable to be used in an electric car. An electronic car foot pedal and a battery bank were used as a main source of power with a capacity suitable to a light- or medium-weight car. The Variations of DC Series Motor rotating speed and active torque over the time were studied for these cases, when various resistive loads coupled to DC Series Motor. Some conclusions and remarks on the practical performance and behaviour of IM used in the electric car were concluded.
