Patents by Inventor Peter Michalak

Peter Michalak 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).

  • Method and apparatus for determining the angle between the air-gap flux vector and the stator current vector of an asynchronous machine fed from an intermediate current-link frequency converter
    Patent number: 4502005
    Abstract: According to the method, current blocks of the stator currents are transformed into square waves of constant amplitude and the current blocks of the stator currents are extended to 180.degree. el. Fundamental components are filtered out from the stator voltages and the phase of the fundamental components are shifted lagging 90.degree. el. The phase-shifted fundamental components are connected into square waves of constant amplitude, at least one square wave of the currents is multiplied by the square wave of the voltage phase following the current phase, and the mean value thereof is formed. There is also an apparatus for implementing the method.
    Type: Grant
    Filed: March 29, 1982
    Date of Patent: February 26, 1985
    Assignee: Brown, Boveri & Cie AG
    Inventors: Herbert Lisner, Peter Michalak