Rockwell Automation Technologies Incorporated

American Superconductor Corporation

Ajith H Wijenayake

Lixiang Wei

Rangarajan M Tallam

Richard Lukaszewski

Douglas C Folts

Paul Thomas Krause

Michael William Loth

Dennis Braun

Gary J Bowers

Robert J Johnson

Kleber V C Facchini

An apparatus for harvesting solar power includes a photovoltaic array for generating a DC voltage; a discharge circuit for causing the DC voltage to decay from a first value to a second value; and an inverter circuit for transforming an output voltage from the discharge circuit into an AC voltage.

Reducing photovoltaic array voltage during inverter re-enablement

A power electronics device with an improved pre-charge circuit configuration is provided. More specifically, the input of the motor drive module may accept an AC or DC source voltage. In this way, the pre-charge circuit of the motor drive module may be utilized whether the motor drive is coupled to an AC or DC source.

Power electronic module pre-charge system and method

An apparatus and method for converting DC voltage across positive and negative DC buses to three phase AC voltages on first, second and third AC output lines, the method comprising the steps of providing first and second three phase inverters that include a first subset of inverter switches and a second subset of inverter switches, respectively, linking a first choke in series with the first three phase inverter between the positive and negative DC buses and the AC output lines, linking a second choke in series with the second three phase inverter between the positive and negative DC buses and the AC output lines and synchronously controlling the first and second inverter switch subsets so that switching of first and second inverter switch subsets is substantially synchronized among the three phases.

Method and apparatus for synchronized parallel operation of PWM inverters with limited circulating current

Growing community of inventors

New Berlin, WI, United States of America

Ajith H Wijenayake