Patents by Inventor Christian J. Wernlund

Christian J. Wernlund 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).

  • DC to AC converter that generates the sine wave from the pulse width modulated signal
    Patent number: 8345451
    Abstract: A method and apparatus for converting DC electricity to AC electricity, the AC electricity having a sine wave shape. DC electricity is supplied to a pulse width modulator. A pulse width modulated signal is formed from the DC electricity, the pulse width modulated signal comprising a plurality of pulses, each pulse having a duration representing an amplitude of the sine wave during an interval of the sine wave represented by the pulse, the pulse width modulated signal comprising a plurality of pulses (or a pulse train) during one sine wave period. The sine wave is generated from the pulse width modulated signal, values of the sine wave during successive sine wave intervals responsive to the duration of the pulse that represents the sine wave interval.
    Type: Grant
    Filed: November 8, 2010
    Date of Patent: January 1, 2013
    Inventors: James V. Wernlund, Roger F. Wernlund, Zachary J. Wernlund, Christian J. Wernlund
  • DC TO AC CONVERTER
    Publication number: 20110157937
    Abstract: A method and apparatus for converting DC electricity to AC electricity, the AC electricity having a sine wave shape. DC electricity is supplied to a pulse width modulator. A pulse width modulated signal is formed from the DC electricity, the pulse width modulated signal comprising a plurality of pulses, each pulse having a duration representing an amplitude of the sine wave during an interval of the sine wave represented by the pulse, the pulse width modulated signal comprising a plurality of pulses (or a pulse train) during one sine wave period. The sine wave is generated from the pulse width modulated signal, values of the sine wave during successive sine wave intervals responsive to the duration of the pulse that represents the sine wave interval.
    Type: Application
    Filed: November 8, 2010
    Publication date: June 30, 2011
    Inventors: James V. Wernlund, Roger F. Wernlund, Zachary J. Wernlund, Christian J. Wernlund