Patents by Inventor Esa Paatero

Esa Paatero has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Power conversion apparatus with DC bus precharge circuits and methods of operation thereof
    Patent number: 7684222
    Abstract: A power conversion apparatus, such as a UPS, includes a DC link including first and second DC busses and a reference bus and a DC generator circuit coupled to the DC link and operative to generate first and second DC voltages with respect to the reference bus on respective ones of the first and second DC busses. The apparatus further includes a precharge circuit coupled to the DC link and operative to charge a first capacitance between the first DC bus and the reference bus and to transfer charge from the charged first capacitance to a second capacitance between the second DC bus and the reference bus. The DC generator circuit may be operative to commence generation of the first and second DC voltages on the first and second DC busses after the precharge circuit precharges the first and second DC busses. Related operating methods are also discussed.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: March 23, 2010
    Assignee: Eaton Corporation
    Inventor: Esa Paatero
  • Power conversion apparatus with DC bus precharge circuits and methods of operation thereof
    Publication number: 20050213357
    Abstract: A power conversion apparatus, such as a UPS, includes a DC link including first and second DC busses and a reference bus and a DC generator circuit coupled to the DC link and operative to generate first and second DC voltages with respect to the reference bus on respective ones of the first and second DC busses. The apparatus further includes a precharge circuit coupled to the DC link and operative to charge a first capacitance between the first DC bus and the reference bus and to transfer charge from the charged first capacitance to a second capacitance between the second DC bus and the reference bus. The DC generator circuit may be operative to commence generation of the first and second DC voltages on the first and second DC busses after the precharge circuit precharges the first and second DC busses. Related operating methods are also discussed.
    Type: Application
    Filed: March 24, 2004
    Publication date: September 29, 2005
    Inventor: Esa Paatero