1
Alexander Levran, Joseph Marion Nowosielski, Giao Mong Ton That, Ramamoorthy Rajagopalan, Henri Mabboux, David Mazur: Power conversion and distribution system. Square D Company, Michael J Femal, Larry I Golden, November 9, 1999: US05982645 (201 worldwide citation)

A power conversion system is described which includes a power input for accepting a waveform at a given power level and frequency, and a power output for providing an output waveform at a second given power level. A DC to AC converter accepts a waveform based on an input wave form from the power inp ...


2
Alexander Levran, Joseph M Nowosielski, Giao M Ton That, Ramamoorthy Rajagopalan, Henri Mabboux: AC to DC power conversion system. Square D Company, Michael J Femal, Richard J Graefe, James A Henricks, February 13, 1996: US05491624 (23 worldwide citation)

The present invention converts an alternating current input into a direct current output by switching a current load at high speeds to create a voltage envelope having a maximum allowed voltage and a minimum allowed voltage. Complementary switching elements are employed to take advantage of both the ...


3
Alexander Levran, Joseph M Nowosielski, Giao M Ton That, Ramamoorthy Rajagopalan: DC to DC/DC to AC power conversion system. Square D Company, Michael J Femal, Richard J Graefe, Larry I Golden, May 9, 1995: US05414609 (18 worldwide citation)

A pulse width modulation DC to DC converter operates in an open loop mode to convert the DC output of the AC to DC converter to a desired, predetermined DC level using pulse width modulation techniques and a switching configuration substantially similar to that of the AC to DC converter.


4
Ramamoorthy Rajagopalan: Universal uninterruptible power supply input circuitry and methods for configuring same. Active Power, Fish & Neave IP Group of Ropes & Gray, July 5, 2005: US06914349 (10 worldwide citation)

Systems and methods of universal uninterruptible power supply (UPS) input circuitry are provided. The input circuitry of the present invention enables a UPS system to simply connect and operate in conjunction with any suitable backup power system. In particular, once a user indicates what backup sys ...


5
Alexander Levran, Joseph M Nowosielski, Giao M Ton That, Ramamoorthy Rajagopalan: High efficiency AC to DC power conversion system. Square D Company, Richard J Graefe, Michael J Femal, Larry I Golden, May 28, 1996: US05521811 (6 worldwide citation)

The present invention locates the primary winding of a transformer in a configuration where it substantially surrounds the secondary winding of the transformer in order to enhance the efficiency of the electromagnetic coupling. High magnetic permeability material surrounds portions of the primary wi ...


6
Alexander Levran, Joseph M Nowosielski, Giao M Ton That, Ramamoorthy Rajagopalan: High efficiency, high frequency transformer. Square D Company, Richard J Graefe, Michael J Femal, Larry I Golden, January 7, 1997: US05592137 (2 worldwide citation)

The present invention locates the primary winding of a transformer in a configuration where it substantially surrounds the secondary winding of the transformer in order to enhance the efficiency of the electromagnetic coupling. High magnetic permeability material surrounds portions of the primary wi ...


7
Ramamoorthy Rajagopalan: Universal uninterruptible power supply input circuitry and methods for configuring same. Fish & Neave, August 28, 2003: US20030160514-A1 (1 worldwide citation)

Systems and methods of universal uninterruptible power supply (UPS) input circuitry are provided. The input circuitry of the present invention enables a UPS system to simply connect and operate in conjunction with any suitable backup power system. In particular, once a user indicates what backup sys ...