Patents by Inventor Dietmar Retzmann

Dietmar Retzmann 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).

  • Patent number: 8138637
    Abstract: An electrical energy transmission device has phase conductors, which carry alternating current and have transfer impedance, and sheathed conductors, which are inductively coupled to the phase conductors. A first end and a second end of each sheathed conductor form a sheath circuit with a reactance. An electronic assembly for changing the impedance of the sheath circuit is provided. The electrical energy transmission device can be used flexibly given different demands placed on the energy transmission. The electronic assembly is also configured to increase the transfer impedance.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: March 20, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Gerhard Herold, Lutz Kirschner, Hermann Koch, Dietmar Retzmann
  • Patent number: 7969755
    Abstract: A device for the transmission of electrical energy includes at least one current converter. Each current converter has phase elements with respective arrangements of circuit elements that comprise at least two switchable power semiconductors each and at least two free-wheeling diodes, each connected in parallel thereto, and energy storing means. The transfer properties in or between power distribution networks are improved with the novel device. The device is provided with means for controlling the current converter in such a manner that the zero crossing, the amplitude and/or the instantaneous values of an alternating current of a transfer network that can be connected to the device and/or the direct current of a direct current line that connects at least one current converter to a direct current source, and/or the direct voltage and the direct current of at least three interconnected current converters can be controlled.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: June 28, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventors: Mark Davies, Jörg Dorn, Hartmut Huang, Dietmar Retzmann
  • Publication number: 20080278121
    Abstract: An electrical energy transmission device has phase conductors, which carry alternating current and have transfer impedance, and sheathed conductors, which are inductively coupled to the phase conductors. A first end and a second end of each sheathed conductor form a sheath circuit with a reactance. An electronic assembly for changing the impedance of the sheath circuit is provided. The electrical energy transmission device can be used flexibly given different demands placed on the energy transmission. The electronic assembly is also configured to increase the transfer impedance.
    Type: Application
    Filed: December 7, 2005
    Publication date: November 13, 2008
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Gerhard Herold, Lutz Kirschner, Hermann Koch, Dietmar Retzmann
  • Publication number: 20080252142
    Abstract: A device for electrical energy transmission includes one or more current converters. Each current converter has phase elements with at least one series connection of circuit elements each with at least two power semiconductors and at least two free-wheeling diodes that are connected in parallel thereto, and energy storing means. The transfer properties in or between power distribution networks are improved with the novel device. The phase elements have at least two parallel branches that are connected in parallel with each other and each having with a series connection of circuit elements.
    Type: Application
    Filed: September 9, 2005
    Publication date: October 16, 2008
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Mark Davies, Jorg Dorn, Hartmut Huang, Dietmar Retzmann
  • Publication number: 20080205093
    Abstract: A device for the transmission of electrical energy includes at least one current converter. Each current converter has phase elements with respective arrangements of circuit elements that comprise at least two switchable power semiconductors each and at least two free-wheeling diodes, each connected in parallel thereto, and energy storing means. The transfer properties in or between power distribution networks are improved with the novel device. The device is provided with means for controlling the current converter in such a manner that the zero crossing, the amplitude and/or the instantaneous values of an alternating current of a transfer network that can be connected to the device and/or the direct current of a direct current line that connects at least one current converter to a direct current source, and/or the direct voltage and the direct current of at least three interconnected current converters can be controlled.
    Type: Application
    Filed: September 9, 2005
    Publication date: August 28, 2008
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Mark Davies, Jorg Dorn, Hartmut Huang, Dietmar Retzmann