Patents by Inventor Stig Forsberg

Stig Forsberg 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).

  • Device for phase compensation and excitation of an asynchronous machine operating as a generator
    Patent number: 4341989
    Abstract: The invention relates to a device for phase compensation and excitation of a multiphase asynchronous machine, especially one to be driven as a generator and to be operated at low speed. Each winding (1 to 3) in the machine is connected in series or in parallel with a capacitive element consisting of a bank of capacitors (4 to 6) having at least one pair of series connected electrolytic capacitors (7, 8), having in each pair equal terminals interconnected.
    Type: Grant
    Filed: February 26, 1980
    Date of Patent: July 27, 1982
    Assignee: Elmekano i Lulea AB
    Inventors: Torvald Sandberg, Stig Forsberg