Patents by Inventor Ichiju SATO

Ichiju SATO 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: 11662397
    Abstract: A target value of magnetic flux density and magnetic flux density actually obtained are made to coincide precisely with each other. An electromagnet control device comprises a current value determining unit for determining, based on a magnetic flux density instruction value, a value of current that is made to flow through a coil. The current value determining unit is constructed to execute a second process for determining, based on a second function, a value of the current, if the magnetic flux density is to be decreased from that in a first magnetization state, and a fourth process for expanding or reducing the second function by use of a first scaling ratio for transforming it to a fourth function, and determining, based on the fourth function obtained after above transformation, a value of the current, if the magnetic flux density is to be decreased from that in a third magnetization state.
    Type: Grant
    Filed: April 19, 2022
    Date of Patent: May 30, 2023
    Assignee: EBARA CORPORATION
    Inventors: Haruka Takeuchi, Tomonori Ohashi, Ichiju Sato
  • Publication number: 20220236341
    Abstract: A target value of magnetic flux density and magnetic flux density actually obtained are made to coincide precisely with each other. An electromagnet control device comprises a current value determining unit for determining, based on a magnetic flux density instruction value, a value of current that is made to flow through a coil. The current value determining unit is constructed to execute a second process for determining, based on a second function, a value of the current, if the magnetic flux density is to be decreased from that in a first magnetization state, and a fourth process for expanding or reducing the second function by use of a first scaling ratio for transforming it to a fourth function, and determining, based on the fourth function obtained after above transformation, a value of the current, if the magnetic flux density is to be decreased from that in a third magnetization state.
    Type: Application
    Filed: April 19, 2022
    Publication date: July 28, 2022
    Inventors: Haruka TAKEUCHI, Tomonori OHASHI, Ichiju SATO
  • Patent number: 11346896
    Abstract: A target value of magnetic flux density and magnetic flux density actually obtained are made to coincide precisely with each other. An electromagnet control device comprises a current value determining unit for determining, based on a magnetic flux density instruction value, a value of current that is made to flow through a coil. The current value determining unit is constructed to execute a second process for determining, based on a second function, a value of the current, if the magnetic flux density is to be decreased from that in a first magnetization state, and a fourth process for expanding or reducing the second function by use of a first scaling ratio for transforming it to a fourth function, and determining, based on the fourth function obtained after above transformation, a value of the current, if the magnetic flux density is to be decreased from that in a third magnetization state.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: May 31, 2022
    Assignee: EBARA CORPORATION
    Inventors: Haruka Takeuchi, Tomonori Ohashi, Ichiju Sato
  • Patent number: 11295935
    Abstract: The electromagnet device of the present invention comprises: a yoke having an annular groove in a front surface thereof; an annular coil provided in the groove; and an epoxy resin provided on an outer surface of the coil configured to secure the coil to the yoke, wherein there is a clearance between an outer circumferential surface of the groove in the yoke and the epoxy resin provided on an radially outer side of the coil.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: April 5, 2022
    Assignee: EBARA CORPORATION
    Inventors: Tomonori Ohashi, Toshimitsu Barada, Hironobu Yamasaki, Misako Kudo, Ichiju Sato
  • Patent number: 11244812
    Abstract: An electromagnet control device includes a current value determining circuit configured to execute a second process for determining, based on a second function, a value of the current, in the case that the magnetic flux density is to be decreased from that in a first magnetization state, and a fourth process for expanding or reducing the second function by use of a first scaling ratio for transforming it to a fourth function, and determining, based on the fourth function obtained after above transformation, a value of the current, in the case that the magnetic flux density is to be decreased from that in a third magnetization state. The current value determining circuit is further configured to determine the first scaling ratio in such a manner that the second function fits measured data that are obtained in advance by decreasing the magnetic flux density from that in the third magnetization state.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: February 8, 2022
    Assignee: EBARA CORPORATION
    Inventors: Haruka Takeuchi, Tomonori Ohashi, Ichiju Sato
  • Patent number: 10995765
    Abstract: A magnetic levitated pump that does not cause pulsation of a pumped liquid and can suppress the generation of particles, which are liable to be produced by contact of a sliding part, is disclosed. The magnetic levitated pump for magnetically levitating an impeller housed in a pump casing includes a motor configured to rotate the impeller, and an electromagnet configured to magnetically support the impeller. The motor and the electromagnet are arranged so as to face each other across the impeller, and the motor is arranged on the opposite side of a suction port of the pump casing.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: May 4, 2021
    Assignee: EBARA CORPORATION
    Inventors: Ichiju Sato, Hiroshi Sobukawa, Toshimitsu Barada, Tomonori Ohashi, Satoshi Mori
  • Publication number: 20210063498
    Abstract: A target value of magnetic flux density and magnetic flux density actually obtained are made to coincide precisely with each other. An electromagnet control device comprises a current value determining unit for determining, based on a magnetic flux density instruction value, a value of current that is made to flow through a coil. The current value determining unit is constructed to execute a second process for determining, based on a second function, a value of the current, if the magnetic flux density is to be decreased from that in a first magnetization state, and a fourth process for expanding or reducing the second function by use of a first scaling ratio for transforming it to a fourth function, and determining, based on the fourth function obtained after above transformation, a value of the current, if the magnetic flux density is to be decreased from that in a third magnetization state.
    Type: Application
    Filed: July 13, 2020
    Publication date: March 4, 2021
    Inventors: Haruka TAKEUCHI, Tomonori OHASHI, Ichiju SATO
  • Publication number: 20190326091
    Abstract: An electromagnet control device includes a current value determining circuit configured to execute a second process for determining, based on a second function, a value of the current, in the case that the magnetic flux density is to be decreased from that in a first magnetization state, and a fourth process for expanding or reducing the second function by use of a first scaling ratio for transforming it to a fourth function, and determining, based on the fourth function obtained after above transformation, a value of the current, in the case that the magnetic flux density is to be decreased from that in a third magnetization state. The current value determining circuit is further configured to determine the first scaling ratio in such a manner that the second function fits measured data that are obtained in advance by decreasing the magnetic flux density from that in the third magnetization state.
    Type: Application
    Filed: April 18, 2019
    Publication date: October 24, 2019
    Inventors: Haruka Takeuchi, Tomonori Ohashi, Ichiju Sato
  • Publication number: 20180114678
    Abstract: The electromagnet device of the present invention comprises: a yoke having an annular groove in a front surface thereof; an annular coil provided in the groove; and an epoxy resin provided on an outer surface of the coil configured to secure the coil to the yoke, wherein there is a clearance between an outer circumferential surface of the groove in the yoke and the epoxy resin provided on an radially outer side of the coil.
    Type: Application
    Filed: May 9, 2016
    Publication date: April 26, 2018
    Inventors: Tomonori OHASHI, Toshimitsu BARADA, Hironobu YAMASAKI, Misako KUDO, Ichiju SATO
  • Publication number: 20160131141
    Abstract: A magnetic levitated pump that does not cause pulsation of a pumped liquid and can suppress the generation of particles, which are liable to be produced by contact of a sliding part, is disclosed. The magnetic levitated pump for magnetically levitating an impeller housed in a pump casing includes a motor configured to rotate the impeller, and an electromagnet configured to magnetically support the impeller. The motor and the electromagnet are arranged so as to face each other across the impeller, and the motor is arranged on the opposite side of a suction port of the pump casing.
    Type: Application
    Filed: October 30, 2015
    Publication date: May 12, 2016
    Applicant: EBARA CORPORATION
    Inventors: Ichiju SATO, Hiroshi SOBUKAWA, Toshimitsu BARADA, Tomonori OHASHI, Satoshi MORI