Patents by Inventor Soon Chang ROH

Soon Chang ROH 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: 10916981
    Abstract: The inventive concept relates to a permanent magnet rotating device having a minimized cogging torque, a permanent magnet generator using the same, and a motor, and more particularly, an objective of the inventive concept is to minimize a cogging torque of a permanent magnet rotating device including a stator and a rotor used in a motor or a generator by a simple combination of the number of poles and the number of slots and a proper arrangement of permanent magnets without using various conventional methods for reducing cogging torque while increasing costs. Through the inventive concept, cogging torque is minimized when a combination of the number of poles and the number of slots are adjusted, the width of lower ends of slots and a spacing distance between the permanent magnets are made the same, and a proper winding method and a pitch are applied.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: February 9, 2021
    Inventor: Soon Chang Roh
  • Publication number: 20190006897
    Abstract: The inventive concept relates to a permanent magnet rotating device having a minimized cogging torque, a permanent magnet generator using the same, and a motor, and more particularly, an objective of the inventive concept is to minimize a cogging torque of a permanent magnet rotating device including a stator and a rotor used in a motor or a generator by a simple combination of the number of poles and the number of slots and a proper arrangement of permanent magnets without using various conventional methods for reducing cogging torque while increasing costs. Through the inventive concept, cogging torque is minimized when a combination of the number of poles and the number of slots are adjusted, the width of lower ends of slots and a spacing distance between the permanent magnets are made the same, and a proper winding method and a pitch are applied.
    Type: Application
    Filed: July 13, 2018
    Publication date: January 3, 2019
    Inventor: Soon Chang ROH