Patents by Inventor Helmut Neupauer, deceased

Helmut Neupauer, deceased 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: 4887200
    Abstract: A method and apparatus for determining the quenching angle in inverter valves, in which the pulse-shaped deviations, which occur in the valve voltages due to the current commutations as compared to the corresponding fundamental waveforms, are blanked out in the form of voltage blocks. For the duration of the quenching angle, a binary measuring signal is generated which is triggered by an end-of-conduction pulse and is terminated by a zero voltage crossing pulse. The end-of-conduction pulse indicating the completion of the commutation is formed by the flank at the end of the voltage shift caused by the preceeding commutation in the valve voltage as compared to the fundamental waveforms.
    Type: Grant
    Filed: September 23, 1988
    Date of Patent: December 12, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventor: Helmut Neupauer, deceased