All Stories

  1. Optimising the structure of a cascaded modular battery system for enhancing the performance of battery packs

    Article • The Journal of Engineering, January 2019, the Institution of Engineering and Technology (the IET)

    Christian Klumpner

  2. Design and evaluation of an energy storage system for helicopters

    Article • The Journal of Engineering, January 2019, the Institution of Engineering and Technology (the IET)

    Christian Klumpner

  3. Power Electronic Converters

    Article • IET Power Electronics, October 2016, the Institution of Engineering and Technology (the IET)

    Prof Pat W Wheeler, Christian Klumpner

  4. Hybrid inverter arrangements to facilitate reduced switching losses of the main inverter

    Article • October 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  5. Mitigating the effect of series capacitance unbalance on the voltage reduction capability of an auxiliary CSI used as switching ripple active filter

    Article • September 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  6. Experimental validation of the solid state substation with embedded energy storage concept

    Article • September 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  7. The effect of including power converter losses when modelling energy storage systems: A UK domestic study

    Article • September 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  8. Development of a battery energy loss observer based on improved equivalent circuit modelling

    Article • September 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  9. Investigations in the Modeling and Control of a Medium-Voltage Hybrid Inverter System That Uses a Low-Voltage/Low-Power Rated Auxiliary Current Source Inverter

    Article • IEEE Journal of Emerging and Selected Topics in Power Electronics, March 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  10. Dynamic phasor analysis and design of phase-locked loops for single phase grid connected converters

    Article • COMPEL The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, July 2015, Emerald

    Christian Klumpner

  11. A hybrid inverter system for medium voltage applications using a low voltage auxiliary CSI

    Article • September 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  12. A hybrid converter for medium voltage using a low-voltage current source active filter connected via a series capacitor

    Article • August 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  13. Assessing the accuracy of loss estimation methods for supercapacitor energy storage devices operating under constant power cycling

    Article • August 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner, Professor George Zheng Chen

  14. A Hybrid Inverter Solution for Medium Voltage Applications using Series Capacitor and a CSI Active Power Filter (SC-APF)

    Article • January 2014, the Institution of Engineering and Technology (the IET)

    Christian Klumpner

  15. An Analysis of Efficiency Improvement with the Installation of Energy Storage in Power Systems

    Article • January 2014, the Institution of Engineering and Technology (the IET)

    Christian Klumpner

  16. Analysis of stability aspects of a large constant power load in a local grid

    Article • September 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  17. Comparison of multilevel PWM versus interleaved based sinewave shaping for two-stage current source inverters used in PV applications

    Article • September 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  18. Modelling and control of a multi-stage interleaved DC–DC converter with coupled inductors for super-capacitor energy storage system

    Article • IET Power Electronics, August 2013, the Institution of Engineering and Technology (the IET)

    Christian Klumpner

  19. Repetitive and Resonant Control for a Single-Phase Grid-Connected Hybrid Cascaded Multilevel Converter

    Article • IEEE Transactions on Power Electronics, May 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  20. Investigation in the PV Converter Smoothing Circuit Size Reduction vs. Loss in Energy Capturing

    Article • Applied Mechanics and Materials, February 2013, Trans Tech Publications

    Christian Klumpner

  21. Novel Integration of Wind Generator-Energy Storage Systems Within Microgrids

    Article • IEEE Transactions on Smart Grid, June 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  22. Common Mode Voltage Cancellation in a Buck-Type Active Front-End Rectifier Topology

    Article • Journal of Power Electronics, March 2012, The Korean Institute of Power Electronics

    Christian Klumpner

  23. Evaluation of a digitally controlled power electronic emulator for supercapacitor

    Article • January 2012, the Institution of Engineering and Technology (the IET)

    Professor George Zheng Chen, Christian Klumpner

  24. Assessing the Benefits of Hybrid Cycloconverters

    Article • IEEE Transactions on Industrial Electronics, January 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  25. Achieving the desired transformer leakage inductance necessary in DC-DC converters for energy storage applications

    Article • January 2012, the Institution of Engineering and Technology (the IET)

    Christian Klumpner

  26. High performance multilevel converter topology for interfacing energy storage systems with medium voltage grids

    Article • November 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  27. Characterization of energy storage devices for constant power applications

    Article • November 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  28. Space-Vector Modulated Multilevel Matrix Converter

    Article • IEEE Transactions on Industrial Electronics, October 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  29. A power electronic controlled dump load with negligible harmonics for accurate loading used in testing small wind turbines

    Article • July 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  30. Hybrid cascaded multilevel converter with integrated series Active Power Filter for interfacing energy storage system to medium voltage grid

    Article • June 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  31. A new duty cycle based efficiency estimation method for a supercapacitor stack under constant power operation

    Article • January 2010, the Institution of Engineering and Technology (the IET)

    Christian Klumpner

  32. Selecting the power electronic interface for a supercapattery based energy storage system

    Article • June 2009, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner, Professor George Zheng Chen

  33. Experimental Evaluation of Hybrid Cycloconverters

    Article • February 2009, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  34. A Cost-Effective Solution to Power the Gate Drivers of Multilevel Inverters using the Bootstrap Power Supply Technique

    Article • February 2009, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  35. Implementation of a Hybrid AC–AC Direct Power Converter With Unity Voltage Transfer

    Article • IEEE Transactions on Power Electronics, July 2008, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  36. A two-stage power converter for welding applications with increased efficiency and reduced filtering

    Article • June 2008, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  37. Hybrid power converters: An exploration of benefits

    Article • June 2008, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  38. Hybrid power electronic converters: An exploration of benefits

    Article • June 2008, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  39. Hybrid matrix converter topologies: An exploration of benefits

    Article • June 2008, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  40. Experimental evaluation of the indirect three-level sparse matrix converter

    Article • January 2008, the Institution of Engineering and Technology (the IET)

    Christian Klumpner

  41. A new matrix converter-voltage source inverter hybrid arrangement for an adjustable speed-open winding induction motor drive with improved performance

    Article • January 2008, the Institution of Engineering and Technology (the IET)

    Christian Klumpner

  42. A New Three-Level Indirect Matrix Converter with Reduced Number of Switches

    Article • September 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  43. A New Modulation Method for the Three-Level-Output-Stage Matrix Converter

    Article • April 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  44. Hybrid cycloconverters: An exploration of benefits

    Article • January 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  45. Modulation method for the three-level-output-stage matrix converter under balanced and unbalanced supply condition

    Article • January 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  46. A New Single-Stage Current Source Inverter for Photovoltaic and Fuel Cell Applications using Reverse Blocking IGBTs

    Article • January 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  47. A New Three-Level Sparse Indirect Matrix Converter

    Article • November 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  48. A New Two-Stage Voltage Source Inverter with Modulated DC-link Voltage and Reduced Switching Losses

    Article • November 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  49. A New Hybrid Cycloconverter with Smooth Output Voltage Generation Capability and Accurate Control of the Circulating Current

    Article • November 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  50. A Hybrid Approach to Improve the Robustness Against Unbalanced Voltage Supply and Cancel the Common Mode Voltage for a 3-ph Buck-Type Rectifier

    Article • August 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  51. A Hybrid Approach to Improve the Robustness Against Unbalanced Voltage Supply and Cancel the Common Mode Voltage for a 3-ph Buck-Type Rectifier

    Article • August 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  52. New modulation method for matrix converters

    Article • IEEE Transactions on Industry Applications, May 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner, Prof Frede Blaabjerg

  53. Using reverse-blocking IGBTs in power converters for adjustable-speed drives

    Article • IEEE Transactions on Industry Applications, May 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner, Prof Frede Blaabjerg

  54. New Methods for the Active Compensation of Unbalanced Supply Voltages for Two-Stage Direct Power Converters

    Article • IEEJ Transactions on Industry Applications, January 2006, Institute of Electrical Engineers of Japan (IEE Japan)

    Christian Klumpner

  55. A predictive current control scheme for a hybrid AC/AC direct power converter

    Article • January 2006, the Institution of Engineering and Technology (the IET)

    Christian Klumpner

  56. Compact ASD Topologies for Single-Phase Integrated Motor Drives with Sinusoidal Input Current

    Article • EPE Journal, August 2005, Taylor & Francis

    Christian Klumpner

  57. Modulation Method for a Multiple Drive System Based on a Two-Stage Direct Power Conversion Topology With Reduced Input Current Ripple

    Article • IEEE Transactions on Power Electronics, July 2005, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner, Prof Frede Blaabjerg

  58. An indirect matrix converter with a cost effective protection and control

    Article • January 2005, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  59. Improvement of output voltage capability of a two stage direct power converter under unbalanced input voltages

    Article • January 2005, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  60. Short Term Braking Capability During Power Interruptions for Integrated Matrix Converter—Motor Drives

    Article • IEEE Transactions on Power Electronics, March 2004, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner, Prof Frede Blaabjerg

  61. An AC/AC direct power conversion topology having multiple power grid connections with adjustable loading

    Article • January 2004, the Institution of Engineering and Technology (the IET)

    Christian Klumpner

  62. A new power converter for fuel cells with high system efficiency

    Article • International Journal of Electronics, November 2003, Taylor & Francis

    Christian Klumpner

  63. A Direct Power Electronic Conversion Topology for Multi-Drive Applications

    Article • EPE Journal, February 2003, Taylor & Francis

    Prof Frede Blaabjerg, Christian Klumpner

  64. A new matrix converter motor (MCM) for industry applications

    Article • IEEE Transactions on Industrial Electronics, April 2002, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner, Prof Frede Blaabjerg

  65. Experimental evaluation of ride-through capabilities for a matrix converter under short power interruptions

    Article • IEEE Transactions on Industrial Electronics, April 2002, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner, Prof Frede Blaabjerg

  66. New solutions for a low-cost power electronic building block for matrix converters

    Article • IEEE Transactions on Industrial Electronics, April 2002, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner, Prof Frede Blaabjerg

  67. Comparison of two current modulation strategies for matrix converters under unbalanced input voltage conditions

    Article • IEEE Transactions on Industrial Electronics, April 2002, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner, Prof Frede Blaabjerg

  68. Fundamentals of the Matrix Converter Technology

    Article • January 2002, Elsevier

    Christian Klumpner, Prof Frede Blaabjerg

  69. Limited ride-through capabilities for direct frequency converters

    Article • IEEE Transactions on Power Electronics, January 2001, Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner, Prof Frede Blaabjerg

  70. The Matrix Converter: Overvoltages Caused By the Input Filter, Bidirectional Power Flow, and Control for Artificial Loading of Induction Motors

    Article • Electric Machines & Power Systems, February 2000, Taylor & Francis

    Christian Klumpner

  71. Artificial loading of the induction motors using a matrix converter

    Article • January 2000, the Institution of Engineering and Technology (the IET)

    Christian Klumpner

  72. Using reverse blocking IGBTs in power converters for adjustable speed drives

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  73. A new green power inverter for fuel cells

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  74. Short term braking capability during power interruptions for integrated matrix converter-motor drives

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  75. A new cost-effective multi-drive solution based on a two-stage direct power electronic conversion topology

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  76. A new buck-type active front end rectifier topology with improved voltage transfer ratio and common mode voltage cancellation

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  77. Improved control of an active-front-end adjustable speed drive with a small de-link capacitor under real grid conditions

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner, Prof Frede Blaabjerg

  78. A new class of hybrid AC/AC direct power converters

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  79. Converter topologies with low passive components usage for the next generation of integrated motor drives

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  80. Evaluation of the converter topologies suited for integrated motor drives

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  81. Hybrid Indirect Matrix Converter Immune to Unbalanced Voltage Supply, with Reduced Switching Losses and Improved Voltage Transfer Ratio

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  82. Adjustable speed drives with square-wave input current: a cost effective step in development to improve their performance

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  83. Hybrid Direct Power Converters with Increased/Higher than Unity Voltage Transfer Ratio and Improved Robustness against Voltage Supply Disturbances

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  84. Active Compensation of Unbalanced Supply Voltage for Two-Stage Direct Power Converters Using the Clamp Capacitor

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  85. Control of a two-stage direct power converter with a single voltage sensor mounted in the intermediary circuit

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner, Prof Frede Blaabjerg

  86. Comparison of two current modulation strategies for matrix converters under unbalanced input voltage conditions

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  87. A new generalized two-stage direct power conversion topology to independently supply multiple AC loads from multiple power grids with adjustable power loading

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner, Prof Frede Blaabjerg

  88. A new modulation method for matrix converters

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  89. Modulation method for a multiple drive system based on a two-stage direct power conversion topology with reduced input current ripple

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  90. Implementation of a Hybrid AC/AC Direct Power Converter with Unity Voltage Transfer Ratio

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  91. Stability analysis and experimental evaluation of a matrix converter drive system

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  92. New steps towards a low-cost power electronic building block for matrix converters

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner

  93. A new matrix converter-motor (MCM) for industry applications

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Christian Klumpner