Patents by Inventor Krishna M. Kota

Krishna M. Kota 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).

  • Miniature high speed compressor having embedded permanent magnet motor
    Patent number: 7942646
    Abstract: A high speed centrifugal compressor for compressing fluids includes a permanent magnet synchronous motor (PMSM) having a hollow shaft, the being supported on its ends by ball bearing supports. A permanent magnet core is embedded inside the shaft. A stator with a winding is located radially outward of the shaft. The PMSM includes a rotor including at least one impeller secured to the shaft or integrated with the shaft as a single piece. The rotor is a high rigidity rotor providing a bending mode speed of at least 100,000 RPM which advantageously permits implementation of relatively low-cost ball bearing supports.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: May 17, 2011
    Assignee: University of Central Florida Foundation, Inc
    Inventors: Lei Zhou, Liping Zheng, Louis Chow, Jayanta S. Kapat, Thomas X. Wu, Krishna M. Kota, Xiaoyi Li, Dipjyoti Acharya
  • MINIATURE HIGH SPEED COMPRESSOR HAVING EMBEDDED PERMANENT MAGNET MOTOR
    Publication number: 20070269323
    Abstract: A high speed centrifugal compressor for compressing fluids includes a permanent magnet synchronous motor (PMSM) having a hollow shaft, the being supported on its ends by ball bearing comprising supports. A permanent magnet core is embedded inside the shaft. A stator with a winding is located radially outward of the shaft. The PMSM includes a rotor including at least one impeller secured to the shaft or integrated with the shaft as a single piece. The rotor is a high rigidity rotor providing a bending mode speed of at least 100,000 RPM which advantageously permits implementation of relatively low-cost ball bearing comprising supports.
    Type: Application
    Filed: May 22, 2007
    Publication date: November 22, 2007
    Inventors: Lei Zhou, Liping Zheng, Louis Chow, Jayanta S. Kapat, Thomas X. Wu, Krishna M. Kota, Xiaoyi Li, Dipjyoti Acharya