Patents by Inventor Andres Alejandro Valdez Fernandez

Andres Alejandro Valdez Fernandez 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).

  • Controller for the three-phase cascade multilevel converter used as shunt active filter in unbalanced operation with guaranteed capacitors voltages balance
    Patent number: 7710082
    Abstract: The present invention comprises a controller for the cascade H-bridge three-phase multilevel converter used as a shunt active filter. Based on the proposed mathematical model, the controller is designed to compensate harmonic distortion and reactive power due to a nonlinear distorting load. Simultaneously, the controller guarantees regulation and balance of all capacitor voltages. The idea behind the controller is to allow distortion of the current reference during the transients to guarantee regulation and balance of the capacitors voltages. The controller provides the duty ratios for each H-bridge of the cascade multilevel converter.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: May 4, 2010
    Assignee: Instituto Potosino De Investigacion Cientifica y Technologica (IPICYT)
    Inventors: Gerardo Escobar Valderrama, Misael Fransisco Martinez Montejano, Andres Alejandro Valdez Fernandez, Raymundo Enrique Torres Olguin
  • Controller for the three-phase cascade multilevel converter used as shunt active filter in unbalanced operation with guaranteed capacitors voltages balance
    Publication number: 20090102436
    Abstract: The present invention comprises a controller for the cascade H-bridge three-phase multilevel converter used as a shunt active filter. Based on the proposed mathematical model, the controller is designed to compensate harmonic distortion and reactive power due to a nonlinear distorting load. Simultaneously, the controller guarantees regulation and balance of all capacitor voltages. The idea behind the controller is to allow distortion of the current reference during the transients to guarantee regulation and balance of the capacitors voltages. The controller provides the duty ratios for each H-bridge of the cascade multilevel converter.
    Type: Application
    Filed: October 18, 2007
    Publication date: April 23, 2009
    Inventors: Gerardo Escobar Valderrama, Misael Fransisco Martinez Montejano, Andres Alejandro Valdez Fernandez, Raymundo Enrique Torres Olguin