K
Krishna Raj R
Researcher at University of Houston
Publications - 12
Citations - 187
Krishna Raj R is an academic researcher from University of Houston. The author has contributed to research in topics: Capacitor & Inverter. The author has an hindex of 6, co-authored 11 publications receiving 99 citations. Previous affiliations of Krishna Raj R include Indian Institute of Science & Centre For Electronics Design And Technology.
Papers
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Journal ArticleDOI
A Hybrid 7-Level Inverter Using Low-Voltage Devices and Operation With Single DC-Link
Apurv Kumar Yadav,K. Gopakumar,Krishna Raj R,Loganathan Umanand,Subhashish Bhattacharya,Wojciech Jarzyna +5 more
TL;DR: The voltage-control algorithms for floating capacitors and dc-link stacked capacitors are proposed, which are independent of load power factor and modulation index, and various results at steady and transient states are presented to validate the aforementioned claims.
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A 5-Level Inverter Scheme Using Single DC Link With Reduced Number of Floating Capacitors and Switches for Open-End IM Drives
Mriganka Ghosh Majumder,Apurv Kumar Yadav,K. Gopakumar,Krishna Raj R,Umanand Loganathan,Leopoldo G. Franquelo +5 more
TL;DR: A 5-level inverter topology for open-end induction motor drives by using a single dc source with less number of floating capacitors and power semiconductor switches compared to other existing topologies is presented.
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Instantaneous Balancing of Neutral-Point Voltages for Stacked DC-Link Capacitors of a Multilevel Inverter for Dual-Inverter-Fed Induction Motor Drives
TL;DR: A novel method for instantaneous balancing of neutral-point (NP) voltages with stacked multilevel inverters (MLIs) for variable-speed drives and the generalization of this method for any stacked $n$-level inverter without NP voltage deviation is presented.
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A 24-Sided Voltage Space Vector Based IM Drive with Low-Order Harmonic Elimination for the Full Speed Range
TL;DR: Experimental results, simulation studies on inverter losses, and harmonic performance validate the effectiveness of proposed drive scheme.
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Multilevel 24-Sided Polygonal Voltage-Space-Vector Structure Generation for an IM Drive Using a Single DC Source
Krishna Raj R,K. Gopakumar,Mathews Boby,Apurv Kumar Yadav,Leopoldo G. Franquelo,Sheldon S. Williamson +5 more
TL;DR: For the first time, the generation of a multilevel 24-sided VSVS using a single dc source for induction-motor drives is proposed and a cascaded topology with a dc-source-fed flying-capacitor inverter and two low-voltage capacitor-fed H-bridge cells forms the power circuit.