1
Patrick S Flannery, Venkata Giri Venkataramanan: Power conditioning architecture for a wind turbine. Wisconsin Alumni Research Foundation, Boyle Fredrickson S C, April 5, 2011: US07919879 (11 worldwide citation)

A wind turbine 36 has a back-to-back AC/DC/AC power electronic converter chain in which the grid side converter 48 is connected in series with DFIG stator windings 64. The machine side converter 56 is fed from the rotor windings 54 of the DFIG 44. Series connection of the grid side converter 48 enab ...


2
Nicolai B Mortensen, Venkata Giri Venkataramanan: Apparatus and method for reducing EMI generated by a power conversion device. Wisconsin Alumni Research Foundation, Whyte Hirschboeck Dudek SC, September 29, 2009: US07595687 (5 worldwide citation)

An apparatus and method for reducing EMI generated by a power conversion device, as well as a power conversion device employing such apparatus or method (and/or devices employing such a power conversion device) are disclosed. In at least some embodiments, the apparatus includes a hybrid filter for u ...


3
Venkata Giri Venkataramanan: Three phase isolated vector switching AC to AC frequency converters. Wisconsin Alumni Research Foundation, Foley & Lardner, January 3, 2006: US06982890 (3 worldwide citation)

A three-phase AC to AC frequency converter has a transformer with a three-phase input and n sets of three-phase secondary outputs, where n is three or more, the voltages at each set of secondary output terminals being one or more multiples of 360°/n out of phase with the voltages at the other sets o ...


4
Venkata Giri Venkataramanan, Mahima Gupta: Converter control using reduced link capacitor. Wisconsin Alumni Research Foundation, Bell & Manning, April 24, 2018: US09954427

A controller selects a first switch vector based on a current, voltage, or power of a multi-phase load or power source. The first switch vector identifies a first state for each of a plurality of half-bridges of a converter as on or as off during a first interval. A second switch vector is selected ...


5
Venkata Giri Venkataramanan, Mahima Gupta, Daniel Ludois, Robert Mark Cuzner: Switch network of a multilevel power converter architecture. WISCONSIN ALUMNI RESEARCH FOUNDATION, Bell & Manning, January 29, 2019: US10193440

A power converter provides a pyramidal structure of switches communicating between a capacitive divider at the base of the pyramid and a terminal at the top of the pyramid to provide a transformation of a relationship between current and voltage in power transferred between the capacitive divider an ...


6
Nicolai B Mortensen, Venkata Giri Venkataramanan: Apparatus and method for reducing EMI generated by a power conversion device. Whyte Hirschboeck Dudek S C, January 31, 2008: US20080024951-A1

An apparatus and method for reducing EMI generated by a power conversion device, as well as a power conversion device employing such apparatus or method (and/or devices employing such a power conversion device) are disclosed. In at least some embodiments, the apparatus includes a hybrid filter for u ...


7
Venkata Giri Venkataramanan: Three phase isolated vector switching AC to AC frequency converters. Foley & Lardner, April 14, 2005: US20050078497-A1

A three-phase AC to AC frequency converter has a transformer with a three-phase input and n sets of three-phase secondary outputs, where n is three or more, the voltages at each set of secondary output terminals being one or more multiples of 360°/n out of phase with the voltages at the other sets o ...


8
Patrick S Flannery, Venkata Giri Venkataramanan: Power conditioning architecture for a wind turbine. Boyle Fredrickson Sc, December 6, 2007: US20070278797-A1

A wind turbine 36 has a back-to-back AC/DC/AC power electronic converter chain in which the grid side converter 48 is connected in series with DFIG stator windings 64. The machine side converter 56 is fed from the rotor windings 54 of the DFIG 44. Series connection of the grid side converter 48 enab ...