Patents by Inventor Jien Ma

Jien Ma 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: 9559572
    Abstract: A method for manufacturing a permanent-magnet motor rotor includes manufacturing a rotary shaft, a permanent magnet, a front end cover, a rear end cover, and a magnetic yoke unit, where the magnetic yoke unit contains multiple pole shoe parts and one iron core part, where each pole shoe part and the iron core part are connected therebetween via a connecting strip; manufacturing a rotor spacer; all positioning holes of the magnetic yoke unit correspond to the permanent-magnet through hole of the rotor spacer to form a permanent-magnet passage; inserting the permanent magnet into the permanent-magnet passage; inserting tightening bolts; cutting off the mid-section of each connecting strip, overlapping the pole shoe parts to form a rotor pole shoe, overlapping the iron core parts to form a rotor iron core; and arranging respectively the front end cover and the rear end cover on a front end and a rear end.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: January 31, 2017
    Assignee: Zhejiang University
    Inventors: Youtong Fang, Jien Ma, Xiaoyan Huang, Jian Zhang, Qinfen Lu, Jiancheng Zhang, Wei Chen, Jiabin Liu
  • Publication number: 20150026966
    Abstract: A method for manufacturing a permanent-magnet motor rotor includes manufacturing a rotary shaft, a permanent magnet, a front end cover, a rear end cover, and a magnetic yoke unit, where the magnetic yoke unit contains multiple pole shoe parts and one iron core part, where each pole shoe part and the iron core part are connected therebetween via a connecting strip; manufacturing a rotor spacer all positioning holes of the magnetic yoke unit correspond to the permanent-magnet through hole of the rotor spacer to form a permanent-magnet passage; inserting the permanent magnet into the permanent-magnet passage; inserting tightening bolts cutting off the mid-section of each connecting strip, overlapping the pole shoe parts to form a rotor pole shoe, overlapping the iron core parts to form a rotor iron core; and arranging respectively the front end cover and the rear end cover on a front end and a rear end.
    Type: Application
    Filed: April 26, 2012
    Publication date: January 29, 2015
    Applicant: ZHEJIANG UNIVERSITY
    Inventors: Youtong Fang, Jien Ma, Xiaoyan Huang, Jian Zhang, Qinfen Lu, Jiancheng Zhang, Wei Chen, Jiabin Liu