Patents by Inventor Pingh-Shih Wang

Pingh-Shih Wang 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).

  • Motor with motor parts which are movable relative to one another
    Patent number: 5912515
    Abstract: A motor with reduced radial forces includes a first motor part made up of 2P permanent magnet poles surrounding a second motor part formed by a magnetic yoke having a number T of pole teeth and with an air gap between the first and second motor parts. The first and second motor parts are moveable relative to one another. Exciter coils are mounted on the pole teeth and the pole teeth are separated by pole gaps. For a motor with a number 2P magnet poles and a number T of pole teeth which do not have a common submultiple greater than 1, each of the pole teeth have a centrally located auxiliary slot facing the air gap thereby to reduce undesirable radial forces.
    Type: Grant
    Filed: July 21, 1997
    Date of Patent: June 15, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Bernd Ackermann, Leo Honds, Johan C. Compter, Pingh-Shih Wang