The Experts below are selected from a list of 32454 Experts worldwide ranked by ideXlab platform
L G Franquelo - One of the best experts on this subject based on the ideXlab platform.
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novel symmetric six phase induction motor drive using stacked multilevel inverters with a single Dc link and neutral point voltage balancing
IEEE Transactions on Industrial Electronics, 2017Co-Authors: Viju Nair R, Sumit Pramanick, Arun Rahul S, K Gopakumar, L G FranqueloAbstract:This paper proposes a novel six-phase stacked multilevel inverter drive with only one Dc source for a six-phase IM with symmetrically placed windings ( $60$ ° apart). Using one Dc source allows direct ac–ac conversion and the inverter can feed the power back to the grid at any power factor. This paper presents a systematic approach to use one Dc source for the six-phase stacked multilevel inverter fed symmetric IM drive. Here the individual Dc Supply is realized by series connected (split) capacitors with inherent balancing of the neutral point (Dc link capacitor mid point) current within a switching cycle. This also helps in reducing the Dc-link capacitor size. To verify the concept experimentally, a six-phase stacked nine-level inverter is developed in the laboratory for a symmetric six-phase IM and it is run with V/f control. Detailed experimental results are presented to validate the concept.
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a three level common mode voltage eliminated inverter with single Dc Supply using flying capacitor inverter and cascaded h bridge
IEEE Transactions on Power Electronics, 2014Co-Authors: Roshan P Kumar, P P Rajeevan, K Mathew, K Gopakumar, Jose I Leon, L G FranqueloAbstract:A three-level common-mode voltage eliminated inverter with single Dc Supply using flying capacitor inverter and cascaded H-bridge has been proposed in this paper. The three phase space vector polygon formed by this configuration and the polygon formed by the common-mode eliminated states have been discussed. The entire system is simulated in Simulink and the results are experimentally verified. This system has an advantage that if one of devices in the H-bridge fails, the system can still be operated as a normal three-level inverter at full power. This inverter has many other advantages like use of single Dc Supply, making it possible for a back-to-back grid-tied converter application, improved reliability, etc.
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a five level inverter topology with single Dc Supply by cascading a flying capacitor inverter and an h bridge
IEEE Transactions on Power Electronics, 2012Co-Authors: P Roshankumar, P P Rajeevan, K Mathew, K Gopakumar, Jose I Leon, L G FranqueloAbstract:In this paper, a new three-phase, five-level inverter topology with a single-Dc source is presented. The proposed topology is obtained by cascading a three-level flying capacitor inverter with a flying H-bridge power cell in each phase. This topology has redundant switching states for generating different pole voltages. By selecting appropriate switching states, the capacitor voltages can be balanced instantaneously (as compared to the fundamental) in any direction of the current, irrespective of the load power factor. Another important feature of this topology is that if any H-bridge fails, it can be bypassed and the configuration can still operate as a three-level inverter at its full power rating. This feature improves the reliability of the circuit. A 3-kW induction motor is run with the proposed topology for the full modulation range. The effectiveness of the capacitor balancing algorithm is tested for the full range of speed and during the sudden acceleration of the motor.
Sijia Hu - One of the best experts on this subject based on the ideXlab platform.
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a transformer integrated filtering system for power quality improvement of industrial Dc Supply system
IEEE Transactions on Industrial Electronics, 2020Co-Authors: Yong Li, Sijia HuAbstract:This paper proposes a transformer integrated filtering system (TIFS) for harmonic suppression in the industrial Dc Supply system. Designed for the electric environment with large current and severe harmonic contamination and the installation space with restricted planning area, the proposed TIFS has the merits of lower transformer loss, stronger ability in harmonic elimination, and higher integration of the electric equipment in the high-power industrial applications. The winding arrangement of the inductive filtering transformer with integrated reactor is introduced. Considering the influence of the residual weak coupling, the electromagnetic decoupling model of TIFS is established. Then, the interaction between the zero-impedance designed filtering winding and the decoupled winding is analyzed to determine the restricted range of the design parameter. The control strategy together with the transformer design method is further illuminated. At last, the prototype of TIFS is established in the laboratory. The experimental results verify the feasibility and effectiveness of the proposed filtering method.
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power quality improvement using controllable inductive power filtering method for industrial Dc Supply system
Control Engineering Practice, 2019Co-Authors: Yong Li, Sijia HuAbstract:Abstract This paper proposes a novel controllable inductive power filtering (CIPF) method to solve the power quality issues existed in the industrial Dc power Supply system. This method is based on the theory of magnetic potential balance and combined with the hybrid active filtering technology. First, the system topology and wiring scheme are presented, and the equivalent circuit and mathematical models of the filtering system are established. Then, to achieve a better filtering performance, a modified control strategy is designed. The technical features, such as harmonic suppression nearby the nonlinear load and resonance damping, are revealed by means of mechanism analysis. Furthermore, the system stability is discussed based on the Nyquist stability criterion. Finally, both the simulation model and the laboratory platform of the filtering system are established. The research results validate the theoretical analysis, and indicate that the proposed CIPF method with a suitable control coefficient can effectively eliminate the harmonics flowing through the transformer, and improve the operational efficiency of the rectifier system.
Yong Li - One of the best experts on this subject based on the ideXlab platform.
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a transformer integrated filtering system for power quality improvement of industrial Dc Supply system
IEEE Transactions on Industrial Electronics, 2020Co-Authors: Yong Li, Sijia HuAbstract:This paper proposes a transformer integrated filtering system (TIFS) for harmonic suppression in the industrial Dc Supply system. Designed for the electric environment with large current and severe harmonic contamination and the installation space with restricted planning area, the proposed TIFS has the merits of lower transformer loss, stronger ability in harmonic elimination, and higher integration of the electric equipment in the high-power industrial applications. The winding arrangement of the inductive filtering transformer with integrated reactor is introduced. Considering the influence of the residual weak coupling, the electromagnetic decoupling model of TIFS is established. Then, the interaction between the zero-impedance designed filtering winding and the decoupled winding is analyzed to determine the restricted range of the design parameter. The control strategy together with the transformer design method is further illuminated. At last, the prototype of TIFS is established in the laboratory. The experimental results verify the feasibility and effectiveness of the proposed filtering method.
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power quality improvement using controllable inductive power filtering method for industrial Dc Supply system
Control Engineering Practice, 2019Co-Authors: Yong Li, Sijia HuAbstract:Abstract This paper proposes a novel controllable inductive power filtering (CIPF) method to solve the power quality issues existed in the industrial Dc power Supply system. This method is based on the theory of magnetic potential balance and combined with the hybrid active filtering technology. First, the system topology and wiring scheme are presented, and the equivalent circuit and mathematical models of the filtering system are established. Then, to achieve a better filtering performance, a modified control strategy is designed. The technical features, such as harmonic suppression nearby the nonlinear load and resonance damping, are revealed by means of mechanism analysis. Furthermore, the system stability is discussed based on the Nyquist stability criterion. Finally, both the simulation model and the laboratory platform of the filtering system are established. The research results validate the theoretical analysis, and indicate that the proposed CIPF method with a suitable control coefficient can effectively eliminate the harmonics flowing through the transformer, and improve the operational efficiency of the rectifier system.
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An Industrial Dc Power Supply System Based on an Inductive Filtering Method
IEEE Transactions on Industrial Electronics, 2012Co-Authors: Yong Li, Sven Rüberg, Longfu Luo, Dechang Yang, Christian Rehtanz, Jiazhu XuAbstract:This paper proposes a new direct current (Dc) power Supply system based on an inductive filtering method for one industrial Dc load. The operating mechanism of the new inductive filtering method is analyzed, and then, the harmonic model and the equivalent model are established. Moreover, the impedance conditions for the implementation of the inductive filtering method are presented, and the influence of the filtering loop's impedance on the filtering performance is clarified. Both the simulation and the experimental study on one practical inductive-filtering-based industrial Dc Supply system for chemical electrolysis are used to validate the theoretical analysis. The research results show that the inductive filtering method not only greatly reduces the harmonic magnetic flux in the rectifier transformer but also prevents harmonic currents from flowing into the primary (grid) winding of the rectifier transformer. It presents good filtering and reactive power compensating performances to public networks and also increases the operating efficiency of the industrial Dc power Supply system itself.
K Gopakumar - One of the best experts on this subject based on the ideXlab platform.
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novel symmetric six phase induction motor drive using stacked multilevel inverters with a single Dc link and neutral point voltage balancing
IEEE Transactions on Industrial Electronics, 2017Co-Authors: Viju Nair R, Sumit Pramanick, Arun Rahul S, K Gopakumar, L G FranqueloAbstract:This paper proposes a novel six-phase stacked multilevel inverter drive with only one Dc source for a six-phase IM with symmetrically placed windings ( $60$ ° apart). Using one Dc source allows direct ac–ac conversion and the inverter can feed the power back to the grid at any power factor. This paper presents a systematic approach to use one Dc source for the six-phase stacked multilevel inverter fed symmetric IM drive. Here the individual Dc Supply is realized by series connected (split) capacitors with inherent balancing of the neutral point (Dc link capacitor mid point) current within a switching cycle. This also helps in reducing the Dc-link capacitor size. To verify the concept experimentally, a six-phase stacked nine-level inverter is developed in the laboratory for a symmetric six-phase IM and it is run with V/f control. Detailed experimental results are presented to validate the concept.
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a three level common mode voltage eliminated inverter with single Dc Supply using flying capacitor inverter and cascaded h bridge
IEEE Transactions on Power Electronics, 2014Co-Authors: Roshan P Kumar, P P Rajeevan, K Mathew, K Gopakumar, Jose I Leon, L G FranqueloAbstract:A three-level common-mode voltage eliminated inverter with single Dc Supply using flying capacitor inverter and cascaded H-bridge has been proposed in this paper. The three phase space vector polygon formed by this configuration and the polygon formed by the common-mode eliminated states have been discussed. The entire system is simulated in Simulink and the results are experimentally verified. This system has an advantage that if one of devices in the H-bridge fails, the system can still be operated as a normal three-level inverter at full power. This inverter has many other advantages like use of single Dc Supply, making it possible for a back-to-back grid-tied converter application, improved reliability, etc.
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a five level inverter topology with single Dc Supply by cascading a flying capacitor inverter and an h bridge
IEEE Transactions on Power Electronics, 2012Co-Authors: P Roshankumar, P P Rajeevan, K Mathew, K Gopakumar, Jose I Leon, L G FranqueloAbstract:In this paper, a new three-phase, five-level inverter topology with a single-Dc source is presented. The proposed topology is obtained by cascading a three-level flying capacitor inverter with a flying H-bridge power cell in each phase. This topology has redundant switching states for generating different pole voltages. By selecting appropriate switching states, the capacitor voltages can be balanced instantaneously (as compared to the fundamental) in any direction of the current, irrespective of the load power factor. Another important feature of this topology is that if any H-bridge fails, it can be bypassed and the configuration can still operate as a three-level inverter at its full power rating. This feature improves the reliability of the circuit. A 3-kW induction motor is run with the proposed topology for the full modulation range. The effectiveness of the capacitor balancing algorithm is tested for the full range of speed and during the sudden acceleration of the motor.
K Mathew - One of the best experts on this subject based on the ideXlab platform.
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a three level common mode voltage eliminated inverter with single Dc Supply using flying capacitor inverter and cascaded h bridge
IEEE Transactions on Power Electronics, 2014Co-Authors: Roshan P Kumar, P P Rajeevan, K Mathew, K Gopakumar, Jose I Leon, L G FranqueloAbstract:A three-level common-mode voltage eliminated inverter with single Dc Supply using flying capacitor inverter and cascaded H-bridge has been proposed in this paper. The three phase space vector polygon formed by this configuration and the polygon formed by the common-mode eliminated states have been discussed. The entire system is simulated in Simulink and the results are experimentally verified. This system has an advantage that if one of devices in the H-bridge fails, the system can still be operated as a normal three-level inverter at full power. This inverter has many other advantages like use of single Dc Supply, making it possible for a back-to-back grid-tied converter application, improved reliability, etc.
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a five level inverter topology with single Dc Supply by cascading a flying capacitor inverter and an h bridge
IEEE Transactions on Power Electronics, 2012Co-Authors: P Roshankumar, P P Rajeevan, K Mathew, K Gopakumar, Jose I Leon, L G FranqueloAbstract:In this paper, a new three-phase, five-level inverter topology with a single-Dc source is presented. The proposed topology is obtained by cascading a three-level flying capacitor inverter with a flying H-bridge power cell in each phase. This topology has redundant switching states for generating different pole voltages. By selecting appropriate switching states, the capacitor voltages can be balanced instantaneously (as compared to the fundamental) in any direction of the current, irrespective of the load power factor. Another important feature of this topology is that if any H-bridge fails, it can be bypassed and the configuration can still operate as a three-level inverter at its full power rating. This feature improves the reliability of the circuit. A 3-kW induction motor is run with the proposed topology for the full modulation range. The effectiveness of the capacitor balancing algorithm is tested for the full range of speed and during the sudden acceleration of the motor.