Patents by Inventor Yao Da

Yao Da 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).

  • Publication number: 20140118867
    Abstract: Protection of a motor controller from a transient voltage and/or an over-voltage condition is described. A drive circuit includes a rectifier portion and at least one inductive device coupled to the rectifier portion. The drive circuit further includes at least one voltage clamping device coupled in parallel with the at least one inductive device, and at least one switching device configured to open as a function of a direct current (DC) link voltage value.
    Type: Application
    Filed: October 25, 2012
    Publication date: May 1, 2014
    Applicant: Regal Beloit America, Inc.
    Inventors: Roger Carlos Becerra, Yao Da, David Allen Clendenen
  • Publication number: 20140070744
    Abstract: A drive circuit is provided for reducing conducted electromagnetic interference provided by a power line to a motor controller. The power line includes a first alternating current (AC) line output and a second AC line output. The drive circuit includes an EMI filter having a first input terminal, a second input terminal, a first output terminal, and a second output terminal. The first input terminal is configured to be coupled to the first AC line output and the second input terminal is configured to be coupled to the second AC line output. The drive circuit further includes at least two series-coupled filter capacitors positioned after the EMI filter and a power factor correction (PFC) choke. The PFC choke is coupled at a first end to the second output terminal and at a second end between the series-coupled filter capacitors.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Inventors: Roger Carlos Becerra, Yao Da
  • Publication number: 20130033215
    Abstract: An apparatus and method for determining a condition of an electric machine. Search coils are wound around stator teeth and the induced voltage is used to decouple stator and rotor fluxes. The decoupled fluxes allow for machine condition monitoring and fault diagnosis.
    Type: Application
    Filed: August 1, 2011
    Publication date: February 7, 2013
    Applicant: Illinois Institute of Technology
    Inventors: Umamaheshwar Krishnamurthy, Yao Da