Patents by Inventor Hsien-Lin Chiu

Hsien-Lin Chiu 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).

  • Variable speed brushless DC motor
    Patent number: 7190136
    Abstract: A variable speed brushless DC motor includes a rotor, a stator module, and a commutation circuit having commutation switches and a speed-change switch. By means of on/off status of the speed-change switch to control the way of electric current passing through the stator module, the torque-rotational speed characteristic curve of the variable speed brushless DC motor is changed, and therefore the rotational speed of the motor is relatively changed.
    Type: Grant
    Filed: May 2, 2004
    Date of Patent: March 13, 2007
    Assignee: Hsien-Lin Chiu
    Inventor: Hsien-Lin Chiu
  • Variable speed brushless DC motor
    Publication number: 20050088127
    Abstract: A variable speed brushless DC motor includes a rotor, a stator module, and a commutation circuit having commutation switches and a speed-change switch. By means of on/off status of the speed-change switch to control the way of electric current passing through the stator module, the torque-rotational speed characteristic curve of the variable speed brushless DC motor is changed, and therefore the rotational speed of the motor is relatively changed.
    Type: Application
    Filed: May 2, 2004
    Publication date: April 28, 2005
    Inventor: Hsien-Lin Chiu
  • Three-phase direction-current (DC) brushless motor with hall elements
    Patent number: 6359406
    Abstract: Disclosed is an improved three-phase direct-current (DC) brushless motor with Hall elements, in which two Hall elements instead of three Hall elements are placed upon the driving circuit of the DC brushless motor to sense the variation of the magnetic flux during the operation so as to reduce the manufacturing cost and also improve the operation precision.
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: March 19, 2002
    Assignee: Delta Electronics Inc.
    Inventors: Hsien-Lin Chiu, Shih-Ming Huang