Patents by Inventor Walter Springmann

Walter Springmann 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).

  • Matrix converter
    Patent number: 6559532
    Abstract: Nine bidirectionally blocking power components are attached on a substrate in the form of a three-row matrix. The power components are attached between three respective current conductors arranged parallel to each other above and below the power components. The current conductors above the matrix proceed at a right angle relative to the current conductors under the matrix. The interconnects to the gate and auxiliary emitter terminals are situated on or in a thin insulating printed circuit board or film and are secured to the corresponding contacts of the chips in recesses of the current conductors.
    Type: Grant
    Filed: August 15, 2000
    Date of Patent: May 6, 2003
    Assignee: Siemens Aktiengesellschaft
    Inventors: Herbert Schwarzbauer, Walter Springmann, Eckhard Wolfgang
  • Overvoltage protection apparatus for a matrix converter
    Patent number: 6496343
    Abstract: An overvoltage protection apparatus for a matrix converter has nine bidirectional power switches which are arranged in a 3×3 switch matrix. The overvoltage protection apparatus has three varistors on both the network side and the load side, which are each connected, in delta, to input and output connections of the matrix converter. A result, the overvoltage protection apparatus has considerably reduced physical volume, as a result of which the component costs for the overvoltage protection apparatus are very low.
    Type: Grant
    Filed: February 7, 2001
    Date of Patent: December 17, 2002
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jochen Mahlein, Walter Springmann
  • Active overvoltage protection apparatus for a bidirectional power switch in common collector mode
    Patent number: 6407937
    Abstract: The present invention relates to an active overvoltage protection apparatus for a bidirectional power switch which has two back-to-back in series connected semiconductor switches in the “common collector mode” topology. The overvoltage protection apparatus has a diode network which is linked to gate and emitter connections of the bidirectional power switch in the in such a manner as to provide a voltage clamping circuit for each of the semiconductor switches in the bidirectional power switch.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: June 18, 2002
    Assignee: Siemens Aktiengesellschaft
    Inventors: Manfred Bruckmann, Walter Springmann
  • Active overvoltage protection apparatus for a bidirectional power switch in common collector mode
    Publication number: 20010046143
    Abstract: The present invention relates to an active overvoltage protection apparatus for a bidirectional power switch which has two back-to-back in series connected semiconductor switches in the “common collector mode” topology. The overvoltage protection apparatus has a diode network which is linked to gate and emitter connections of the bidirectional power switch in the in such a manner as to provide a voltage clamping circuit for each of the semiconductor switches in the bidirectional power switch.
    Type: Application
    Filed: March 23, 2001
    Publication date: November 29, 2001
    Applicant: SIEMENS AG
    Inventors: Manfred Bruckmann, Walter Springmann
  • Overvoltage protection apparatus for a matrix converter
    Publication number: 20010026427
    Abstract: An overvoltage protection apparatus for a matrix converter has nine bidirectional power switches which are arranged in a 3×3 switch matrix. The overvoltage protection apparatus has three varistors on both the network side and the load side, which are each connected, in delta, to input and output connections of the matrix converter. A result, the overvoltage protection apparatus has considerably reduced physical volume, as a result of which the component costs for the overvoltage protection apparatus are very low.
    Type: Application
    Filed: February 7, 2001
    Publication date: October 4, 2001
    Applicant: SIEMENS AG.
    Inventors: Jochen Mahlein, Walter Springmann
  • Converter motor with an energy recovery capability
    Publication number: 20010021116
    Abstract: The present invention relates to a converter motor with an energy recovery capability, comprising a motor and a self-commutating direct converter, the use of which results in a compact converter motor with an energy recovery capability, which can be used as a four-quadrant drive.
    Type: Application
    Filed: March 8, 2001
    Publication date: September 13, 2001
    Applicant: SIEMENS AG.
    Inventors: Manfred Bruckmann, Bernhard Piepenbreier, Walter Springmann
  • Power semiconductor module having a plurality of semiconductor arrangements
    Patent number: 5459356
    Abstract: A plurality of semiconductor arrangements arranged on interconnects are cected parallel to one another in a module. The arrangements lie opposite one another in pairs. At least one pair and at most two pairs of semiconductor arrangements are arranged to follow one another in the direction of an axis of the module and are further connected to lead conductors. Positions of the lead conductors with respect to the contacted semiconductor arrangements are the same for each pair of semiconductor arrangements or, respectively, two respective pairs of semiconductor arrangements. Corresponding lead conductors are connected to one another above the interconnects.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: October 17, 1995
    Assignees: Eupec Europeische Gesellsch F. Leistungshalbleiter MBH & Co., KG., Siemens Aktiengesellschaft
    Inventors: Gerhard Schulze, Karl-Heinz Sommer, Reinhold Spanke, Gyoergy Papp, Walter Springmann, Peter Zwanziger