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V. Garg - One of the best experts on this subject based on the ideXlab platform.

  • a novel polygon based 18 pulse ac dc converter for vector controlled induction motor drives
    IEEE Transactions on Power Electronics, 2007
    Co-Authors: Bhim Singh, G. Bhuvaneswari, V. Garg
    Abstract:

    This paper presents a novel configuration of an Autotransformer based 18-pulse ac-dc converter for improving the power quality at the point of common coupling (PCC) in variable frequency induction motor drives (VFIMDs). The polygon based connection of Autotransformer for achieving 18-pulse rectification is utilized to result in reduction in rating of the magnetics. The design of the Autotransformer is carried out for an 18-pulse ac-dc converter feeding a vector controlled induction motor drive (VCIMD). Moreover, the Autotransformer design is modified for making it suitable for retrofit applications, where presently a 6-pulse diode bridge rectifier is used. The effect of load variation on VCIMD is also studied and the performance of the proposed 18-pulse ac-dc converter is compared in terms of different power quality indices on both ac as well as dc side with other ac-dc converters. A laboratory prototype of the proposed Autotransformer based 18-pulse ac-dc converter feeding a 10-hp induction motor drive is developed to verify the design and simulated results

  • Harmonic Mitigation in AC–DC Converters for Vector Controlled Induction Motor Drives
    IEEE Transactions on Energy Conversion, 2007
    Co-Authors: Bhim Singh, G. Bhuvaneswari, V. Garg
    Abstract:

    This paper deals with Autotransformer-based multipulse ac--dc converters with reduced magnetics feeding vector controlled induction motor drives for improving the power quality at the point of common coupling. The proposed 12-pulse ac--dc converter-based harmonic mitigator consists of an Autotransformer alongwith a passive shunt filter tuned for 11th harmonic frequency. This results in the elimination of 5th, 7th, and 11th harmonic currents. Similarly, the proposed 18-pulse ac--dc converter-based harmonic mitigator eliminates the 5th, 7th, 11th, 13th, and 17th harmonic currents, thereby improving the power quality at ac mains. The experimentation is carried out on the developed prototype of Autotransformers-based ac--dc converters. Different power quality indexes of the proposed 12-pulse and 18-pulse ac--dc converters are obtained from simulation and verified from experimental results.

  • multipulse improved power quality ac dc convertors for vector controlled induction motor drives
    IEE Proceedings - Electric Power Applications, 2006
    Co-Authors: Bhim Singh, G. Bhuvaneswari, V. Garg
    Abstract:

    The paper deals with polygon Autotransformer-based 12-pulse and 18-pulse AC–DC convertors feeding vector-controlled induction-motor drives (VCIMDs) for improving power quality at the point of common coupling (PCC). The design of Autotransformers is carried out for proposed AC–DC convertors to make them suitable for retrofit applications, where at present a six-pulse diode bridge is used. The effect of load variation on VCIMD is also studied to demonstrate the effectiveness of proposed AC–DC convertors over a wide operating range. Laboratory prototypes of proposed Autotransformer-based 12-pulse and 18-pulse AC–DC convertors are developed and test results are presented to validate the proposed design and model developed of the system.

  • Pulse multiplication in AC-DC converters for harmonic mitigation in vector-controlled induction motor drives
    IEEE Transactions on Energy Conversion, 2006
    Co-Authors: Bhim Singh, G. Bhuvaneswari, V. Garg, Sanjay Gairola
    Abstract:

    In this paper, an Autotransformer with reduced kilovoltampere rating for 24-pulse ac-dc converter fed vector controlled induction motor drives (VCIMDs) is presented for harmonic current reduction. The 24-pulse operation is achieved using dc ripple reinjection technique in 12-pulse ac-dc converters. The proposed novel harmonic mitigator is found capable of suppressing up to 21st harmonic in the supply current. The procedure for the design of Autotransformer for proposed ac-dc converter is presented to show the flexibility in the design for making it a cost-effective replacement suitable for retrofit applications, where presently a 6-pulse diode bridge rectifier is used. The effect of load variation on VCIMD is also studied to demonstrate the effectiveness of the proposed ac-dc converter. A set of power quality indices on input ac mains and on dc bus for a VCIMD fed from other 24-pulse ac-dc converters are also given to compare their performance. The laboratory prototypes of proposed Autotransformers based 12-pulse and 24-pulse ac-dc converters are developed and test results are presented to validate the developed design procedure and the simulation models of these ac-dc converters under varying loads.

Bhim Singh - One of the best experts on this subject based on the ideXlab platform.

  • a novel polygon based 18 pulse ac dc converter for vector controlled induction motor drives
    IEEE Transactions on Power Electronics, 2007
    Co-Authors: Bhim Singh, G. Bhuvaneswari, V. Garg
    Abstract:

    This paper presents a novel configuration of an Autotransformer based 18-pulse ac-dc converter for improving the power quality at the point of common coupling (PCC) in variable frequency induction motor drives (VFIMDs). The polygon based connection of Autotransformer for achieving 18-pulse rectification is utilized to result in reduction in rating of the magnetics. The design of the Autotransformer is carried out for an 18-pulse ac-dc converter feeding a vector controlled induction motor drive (VCIMD). Moreover, the Autotransformer design is modified for making it suitable for retrofit applications, where presently a 6-pulse diode bridge rectifier is used. The effect of load variation on VCIMD is also studied and the performance of the proposed 18-pulse ac-dc converter is compared in terms of different power quality indices on both ac as well as dc side with other ac-dc converters. A laboratory prototype of the proposed Autotransformer based 18-pulse ac-dc converter feeding a 10-hp induction motor drive is developed to verify the design and simulated results

  • Harmonic Mitigation in AC–DC Converters for Vector Controlled Induction Motor Drives
    IEEE Transactions on Energy Conversion, 2007
    Co-Authors: Bhim Singh, G. Bhuvaneswari, V. Garg
    Abstract:

    This paper deals with Autotransformer-based multipulse ac--dc converters with reduced magnetics feeding vector controlled induction motor drives for improving the power quality at the point of common coupling. The proposed 12-pulse ac--dc converter-based harmonic mitigator consists of an Autotransformer alongwith a passive shunt filter tuned for 11th harmonic frequency. This results in the elimination of 5th, 7th, and 11th harmonic currents. Similarly, the proposed 18-pulse ac--dc converter-based harmonic mitigator eliminates the 5th, 7th, 11th, 13th, and 17th harmonic currents, thereby improving the power quality at ac mains. The experimentation is carried out on the developed prototype of Autotransformers-based ac--dc converters. Different power quality indexes of the proposed 12-pulse and 18-pulse ac--dc converters are obtained from simulation and verified from experimental results.

  • multipulse improved power quality ac dc convertors for vector controlled induction motor drives
    IEE Proceedings - Electric Power Applications, 2006
    Co-Authors: Bhim Singh, G. Bhuvaneswari, V. Garg
    Abstract:

    The paper deals with polygon Autotransformer-based 12-pulse and 18-pulse AC–DC convertors feeding vector-controlled induction-motor drives (VCIMDs) for improving power quality at the point of common coupling (PCC). The design of Autotransformers is carried out for proposed AC–DC convertors to make them suitable for retrofit applications, where at present a six-pulse diode bridge is used. The effect of load variation on VCIMD is also studied to demonstrate the effectiveness of proposed AC–DC convertors over a wide operating range. Laboratory prototypes of proposed Autotransformer-based 12-pulse and 18-pulse AC–DC convertors are developed and test results are presented to validate the proposed design and model developed of the system.

  • Pulse multiplication in AC-DC converters for harmonic mitigation in vector-controlled induction motor drives
    IEEE Transactions on Energy Conversion, 2006
    Co-Authors: Bhim Singh, G. Bhuvaneswari, V. Garg, Sanjay Gairola
    Abstract:

    In this paper, an Autotransformer with reduced kilovoltampere rating for 24-pulse ac-dc converter fed vector controlled induction motor drives (VCIMDs) is presented for harmonic current reduction. The 24-pulse operation is achieved using dc ripple reinjection technique in 12-pulse ac-dc converters. The proposed novel harmonic mitigator is found capable of suppressing up to 21st harmonic in the supply current. The procedure for the design of Autotransformer for proposed ac-dc converter is presented to show the flexibility in the design for making it a cost-effective replacement suitable for retrofit applications, where presently a 6-pulse diode bridge rectifier is used. The effect of load variation on VCIMD is also studied to demonstrate the effectiveness of the proposed ac-dc converter. A set of power quality indices on input ac mains and on dc bus for a VCIMD fed from other 24-pulse ac-dc converters are also given to compare their performance. The laboratory prototypes of proposed Autotransformers based 12-pulse and 24-pulse ac-dc converters are developed and test results are presented to validate the developed design procedure and the simulation models of these ac-dc converters under varying loads.

G. Bhuvaneswari - One of the best experts on this subject based on the ideXlab platform.

  • a novel polygon based 18 pulse ac dc converter for vector controlled induction motor drives
    IEEE Transactions on Power Electronics, 2007
    Co-Authors: Bhim Singh, G. Bhuvaneswari, V. Garg
    Abstract:

    This paper presents a novel configuration of an Autotransformer based 18-pulse ac-dc converter for improving the power quality at the point of common coupling (PCC) in variable frequency induction motor drives (VFIMDs). The polygon based connection of Autotransformer for achieving 18-pulse rectification is utilized to result in reduction in rating of the magnetics. The design of the Autotransformer is carried out for an 18-pulse ac-dc converter feeding a vector controlled induction motor drive (VCIMD). Moreover, the Autotransformer design is modified for making it suitable for retrofit applications, where presently a 6-pulse diode bridge rectifier is used. The effect of load variation on VCIMD is also studied and the performance of the proposed 18-pulse ac-dc converter is compared in terms of different power quality indices on both ac as well as dc side with other ac-dc converters. A laboratory prototype of the proposed Autotransformer based 18-pulse ac-dc converter feeding a 10-hp induction motor drive is developed to verify the design and simulated results

  • Harmonic Mitigation in AC–DC Converters for Vector Controlled Induction Motor Drives
    IEEE Transactions on Energy Conversion, 2007
    Co-Authors: Bhim Singh, G. Bhuvaneswari, V. Garg
    Abstract:

    This paper deals with Autotransformer-based multipulse ac--dc converters with reduced magnetics feeding vector controlled induction motor drives for improving the power quality at the point of common coupling. The proposed 12-pulse ac--dc converter-based harmonic mitigator consists of an Autotransformer alongwith a passive shunt filter tuned for 11th harmonic frequency. This results in the elimination of 5th, 7th, and 11th harmonic currents. Similarly, the proposed 18-pulse ac--dc converter-based harmonic mitigator eliminates the 5th, 7th, 11th, 13th, and 17th harmonic currents, thereby improving the power quality at ac mains. The experimentation is carried out on the developed prototype of Autotransformers-based ac--dc converters. Different power quality indexes of the proposed 12-pulse and 18-pulse ac--dc converters are obtained from simulation and verified from experimental results.

  • multipulse improved power quality ac dc convertors for vector controlled induction motor drives
    IEE Proceedings - Electric Power Applications, 2006
    Co-Authors: Bhim Singh, G. Bhuvaneswari, V. Garg
    Abstract:

    The paper deals with polygon Autotransformer-based 12-pulse and 18-pulse AC–DC convertors feeding vector-controlled induction-motor drives (VCIMDs) for improving power quality at the point of common coupling (PCC). The design of Autotransformers is carried out for proposed AC–DC convertors to make them suitable for retrofit applications, where at present a six-pulse diode bridge is used. The effect of load variation on VCIMD is also studied to demonstrate the effectiveness of proposed AC–DC convertors over a wide operating range. Laboratory prototypes of proposed Autotransformer-based 12-pulse and 18-pulse AC–DC convertors are developed and test results are presented to validate the proposed design and model developed of the system.

  • Pulse multiplication in AC-DC converters for harmonic mitigation in vector-controlled induction motor drives
    IEEE Transactions on Energy Conversion, 2006
    Co-Authors: Bhim Singh, G. Bhuvaneswari, V. Garg, Sanjay Gairola
    Abstract:

    In this paper, an Autotransformer with reduced kilovoltampere rating for 24-pulse ac-dc converter fed vector controlled induction motor drives (VCIMDs) is presented for harmonic current reduction. The 24-pulse operation is achieved using dc ripple reinjection technique in 12-pulse ac-dc converters. The proposed novel harmonic mitigator is found capable of suppressing up to 21st harmonic in the supply current. The procedure for the design of Autotransformer for proposed ac-dc converter is presented to show the flexibility in the design for making it a cost-effective replacement suitable for retrofit applications, where presently a 6-pulse diode bridge rectifier is used. The effect of load variation on VCIMD is also studied to demonstrate the effectiveness of the proposed ac-dc converter. A set of power quality indices on input ac mains and on dc bus for a VCIMD fed from other 24-pulse ac-dc converters are also given to compare their performance. The laboratory prototypes of proposed Autotransformers based 12-pulse and 24-pulse ac-dc converters are developed and test results are presented to validate the developed design procedure and the simulation models of these ac-dc converters under varying loads.

Fred C. Lee - One of the best experts on this subject based on the ideXlab platform.

  • A Family of Buck-Type DC-DC Converters with
    2014
    Co-Authors: Kaiwei Yao, Yuancheng Ren, Jia Wei, Fred C. Lee
    Abstract:

    Abstract — This paper introduces a family of buck-type DC-DC converters with Autotransformers, including forward, push-pull, half-bridge, and full-bridge topologies. Compared with an isolated transformer, the Autotransformer has a simpler winding structure, and it only needs to transfer part of the input power, resulting in a smaller secondary winding current. Analysis shows that the Autotransformer can also help to reduce the voltage stress and current ratings of power devices in the DC-DC converters. For some applications, a simple lossless passive clamp circuit can be implemented to solve the transformer leakage problems, and the gate drive is significantly improved with a simple self-adaptive dead-time-controlled bootstrap gate driver. Simulation and experimental results show that the proposed topologies are very suitable for high-frequency applications. Keywords-DC-DC converter; Autotransformer I

  • A family of buck-type DC-DC converters with Autotransformers
    Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition 2003. APEC '03., 1
    Co-Authors: Kaiwei Yao, Yuancheng Ren, Jia Wei, Fred C. Lee
    Abstract:

    This paper introduces a family of buck-type DC-DC converters with Autotransformers, including forward, push-pull, half-bridge, and full-bridge topologies. Compared with an isolated transformer, the Autotransformer has a simpler winding structure, and it only needs to transfer part of the input power, resulting in a smaller secondary winding current. Analysis shows that the Autotransformer can also help to reduce the voltage stress and current ratings of power devices in the DC-DC converters. For some applications, a simple lossless passive clamp circuit can be implemented to solve the transformer leakage problems, and the gate drive is significantly improved with a simple self-adaptive dead-time-controlled bootstrap gate driver. Simulation and experimental results show that the proposed topologies are very suitable for high-frequency applications.

Sanjay Gairola - One of the best experts on this subject based on the ideXlab platform.

  • Pulse multiplication in AC-DC converters for harmonic mitigation in vector-controlled induction motor drives
    IEEE Transactions on Energy Conversion, 2006
    Co-Authors: Bhim Singh, G. Bhuvaneswari, V. Garg, Sanjay Gairola
    Abstract:

    In this paper, an Autotransformer with reduced kilovoltampere rating for 24-pulse ac-dc converter fed vector controlled induction motor drives (VCIMDs) is presented for harmonic current reduction. The 24-pulse operation is achieved using dc ripple reinjection technique in 12-pulse ac-dc converters. The proposed novel harmonic mitigator is found capable of suppressing up to 21st harmonic in the supply current. The procedure for the design of Autotransformer for proposed ac-dc converter is presented to show the flexibility in the design for making it a cost-effective replacement suitable for retrofit applications, where presently a 6-pulse diode bridge rectifier is used. The effect of load variation on VCIMD is also studied to demonstrate the effectiveness of the proposed ac-dc converter. A set of power quality indices on input ac mains and on dc bus for a VCIMD fed from other 24-pulse ac-dc converters are also given to compare their performance. The laboratory prototypes of proposed Autotransformers based 12-pulse and 24-pulse ac-dc converters are developed and test results are presented to validate the developed design procedure and the simulation models of these ac-dc converters under varying loads.