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).
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Patent number: 11662397Abstract: 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: GrantFiled: April 19, 2022Date of Patent: May 30, 2023Assignee: EBARA CORPORATIONInventors: Haruka Takeuchi, Tomonori Ohashi, Ichiju Sato
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Publication number: 20220236341Abstract: 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: ApplicationFiled: April 19, 2022Publication date: July 28, 2022Inventors: Haruka TAKEUCHI, Tomonori OHASHI, Ichiju SATO
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Patent number: 11346896Abstract: 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: GrantFiled: July 13, 2020Date of Patent: May 31, 2022Assignee: EBARA CORPORATIONInventors: Haruka Takeuchi, Tomonori Ohashi, Ichiju Sato
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Patent number: 11295935Abstract: 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: GrantFiled: May 9, 2016Date of Patent: April 5, 2022Assignee: EBARA CORPORATIONInventors: Tomonori Ohashi, Toshimitsu Barada, Hironobu Yamasaki, Misako Kudo, Ichiju Sato
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Patent number: 11244812Abstract: 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: GrantFiled: April 18, 2019Date of Patent: February 8, 2022Assignee: EBARA CORPORATIONInventors: Haruka Takeuchi, Tomonori Ohashi, Ichiju Sato
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Patent number: 10995765Abstract: 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: GrantFiled: October 30, 2015Date of Patent: May 4, 2021Assignee: EBARA CORPORATIONInventors: Ichiju Sato, Hiroshi Sobukawa, Toshimitsu Barada, Tomonori Ohashi, Satoshi Mori
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Publication number: 20210063498Abstract: 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: ApplicationFiled: July 13, 2020Publication date: March 4, 2021Inventors: Haruka TAKEUCHI, Tomonori OHASHI, Ichiju SATO
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Publication number: 20190326091Abstract: 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: ApplicationFiled: April 18, 2019Publication date: October 24, 2019Inventors: Haruka Takeuchi, Tomonori Ohashi, Ichiju Sato
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Publication number: 20180114678Abstract: 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: ApplicationFiled: May 9, 2016Publication date: April 26, 2018Inventors: Tomonori OHASHI, Toshimitsu BARADA, Hironobu YAMASAKI, Misako KUDO, Ichiju SATO
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Publication number: 20160131141Abstract: 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: ApplicationFiled: October 30, 2015Publication date: May 12, 2016Applicant: EBARA CORPORATIONInventors: Ichiju SATO, Hiroshi SOBUKAWA, Toshimitsu BARADA, Tomonori OHASHI, Satoshi MORI