Patents by Inventor Stefan Drexel

Stefan Drexel 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).

  • DETERMINING A WINDING TEMPERATURE OF A WINDING OF AN ELECTRIC MOTOR
    Publication number: 20260051838
    Abstract: In a method for determining a winding temperature of a winding of an electric motor, a measurement operating state of the electric motor is specified for measuring an electrical winding resistance of the winding, with the measurement operating state being specified by an operating state in which an electric current flowing in the winding is modulated with a modulation frequency. The winding resistance is measured in the measurement operating state of the electric motor, with the winding resistance being calculated from modulations of the electric current and an associated electric voltage that is applied to the winding. The winding temperature is calculated from the measured winding resistance. In an operating state of the electric motor which operating state is different from a measurement operating state, the winding temperature is calculated from an operating parameter of the electric motor using a thermal model.
    Type: Application
    Filed: June 13, 2023
    Publication date: February 19, 2026
    Applicant: Siemens Aktiengesellschaft
    Inventors: Stefan Drexel, Johann JEMILLER, SVEN LUDWIG KELLNER, KARL-HEINZ KNECHT, STEFAN KÜNZEL, MARKUS LAMPERT, MIHALY NEMETH-CSOKA, JOHANNES POPP, LARS ROSENBAUM, CARSTEN SPINDLER