Patents by Inventor Dennis Perttula

Dennis Perttula 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).

  • Slip-inducing rotation starting exciter for turbine generator
    Patent number: 6933704
    Abstract: A dynamoelectric machine combining the functions of an exciter, a turning motor, and a starting motor for a turbine. The machine operates in a first mode where the slip between a first stator winding and a first armature winding is positive and thus the magnetic fields interact and operate as a motor to turn the turbine. In a second mode the slip is negative as the turbine turns the shaft and the first stator winding and the first armature operate as an exciter for supplying excitation to the rotating field winding of a main generator.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: August 23, 2005
    Assignee: Siemens Westinghouse Power Corporation
    Inventors: Robert J. Nelson, Dennis Perttula, Stephen Cates, Aaron Staley
  • Starting exciter for a generator
    Publication number: 20040070373
    Abstract: A dynamoelectric machine combining the functions of an exciter, a turning motor, and a starting motor for a turbine. The machine operates in a first mode where the slip between a first stator winding and a first armature winding is positive and thus the magnetic fields interact and operate as a motor to turn the turbine. In a second mode the slip is negative as the turbine turns the shaft and the first stator winding and the first armature operate as an exciter for supplying excitation to the rotating field winding of a main generator.
    Type: Application
    Filed: October 11, 2002
    Publication date: April 15, 2004
    Applicant: Siemens Westinghouse Power Corporation
    Inventors: Robert J. Nelson, Dennis Perttula, Stephen Cates, Aaron Staley