Patents by Inventor Girish Radhakrishna Kamath

Girish Radhakrishna Kamath 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).

  • Autotransformer-based system and method of current harmonics reduction in a circuit
    Patent number: 6861936
    Abstract: A system and method for reducing harmonics in a circuit is disclosed. The system comprises a main rectifier, ( n 3 - 1 ) auxiliary rectifiers connected to the main rectifier, and an autotransformer connected to both the main rectifier and the auxiliary rectifiers which provides 2n-pulse rectification where n equals the number of phases of the system. The autotransformer generates ( n 3 - 1 ) auxiliary voltage sets, each auxiliary voltage set having an auxiliary voltage amplitude, k, and an auxiliary voltage phase, ?, wherein k = 4 + 2 ? 3 ? cos ? ( ? - 7 ? ? 6 ) and wherein ? = sin - 1 ? ( 3 ? sin ? ? ? ? - 0.5 k ) assuming a main voltage amplitude of one and a main voltage phase of ninety degrees, wherein ? = 180 ? ° n and its integral multiples for all possible real values of k.
    Type: Grant
    Filed: February 7, 2002
    Date of Patent: March 1, 2005
    Assignee: Baldor Electric Company
    Inventor: Girish Radhakrishna Kamath
  • Harmonic filter with low cost magnetics
    Patent number: 6498736
    Abstract: A system and method for reducing harmonics in a circuit is disclosed. The system comprises a main rectifier, ( n 3 - 1 ) auxiliary rectifiers connected to the main rectifier, and an autotransformer connected to both the main rectifier and the auxiliary rectifiers which provides 2n-pulse rectification where n equals the number of phases of the system.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: December 24, 2002
    Assignee: Baldor Electric Company
    Inventor: Girish Radhakrishna Kamath
  • Autotransformer-based system and method of current harmonics reduction in a circuit
    Publication number: 20020186112
    Abstract: A system and method for reducing harmonics in a circuit is disclosed.
    Type: Application
    Filed: February 7, 2002
    Publication date: December 12, 2002
    Inventor: Girish Radhakrishna Kamath