Patents by Inventor Jin-yook Yoon

Jin-yook Yoon 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).

  • Patent number: 5804904
    Abstract: An improved 10-pole 9-slot brushless DC motor used as a spindle motor used in devices, such as a computer hard disk driver or a laser scanner, is provided which reduces cogging torque and improves driving torque. The motor includes a field magnet having an annular permanent magnet which is formed of 10 magnetic poles attached to each other in a radial orientation, for generating a flux field and an armature formed by winding an armature core formed of nine slots and nine salient-poles with windings connected in three phases. Also, the field magnet of the motor is rotated by the rotating magnetic field generated by the armature windings. Since the motor has a short cycle and low cogging torque, the motor is very stable. Also, torque ripple is low and the torque characteristics as a whole are improved, thus achieving high efficiency.
    Type: Grant
    Filed: January 16, 1997
    Date of Patent: September 8, 1998
    Assignees: Samsung Electronics Co., Ltd., Gun-hee Jang
    Inventors: No-yeol Park, Seong-man Jang, Gun-hee Jang, Jin-yook Yoon