Patents by Inventor Shuki Wolfus
Shuki Wolfus 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: 11562841Abstract: A hybrid superconductive device for stabilizing an electric grid comprises (a) a magnetic core arrangement at least partially carrying an AC winding the AC winding connectable to an AC circuit for a current to be limited in the event of a fault; (b) at least one superconductive coil configured for storing electromagnetic energy; the superconductive coil magnetically coupled with the core arrangement and saturating the magnetic core arrangement during use. The hybrid superconductive device further comprises a switch unit preprogrammed for switching electric current patterns corresponding to the following modes: at least partially charging the superconductive coil; a standby mode when the superconductive coil is looped back; and at least partially discharging the superconductive coil into the circuit. Optionally, hybrid superconductive device comprises at least one passage located within said magnetic flux. The passage conducts a material flow comprising components magnetically separable by said magnetic flux.Type: GrantFiled: October 29, 2020Date of Patent: January 24, 2023Assignee: MIO SMES LTD.Inventors: Shuki Wolfus, Alexander Friedman, Yakov Nikulshin, Eliezer Perel, Yosef Yeshurun
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Publication number: 20210074458Abstract: A hybrid superconductive device for stabilizing an electric grid comprises (a) a magnetic core arrangement at least partially carrying an AC winding the AC winding connectable to an AC circuit for a current to be limited in the event of a fault; (b) at least one superconductive coil configured for storing electromagnetic energy; the superconductive coil magnetically coupled with the core arrangement and saturating the magnetic core arrangement during use. The hybrid superconductive device further comprises a switch unit preprogrammed for switching electric current patterns corresponding to the following modes: at least partially charging the superconductive coil; a standby mode when the superconductive coil is looped back; and at least partially discharging the superconductive coil into the circuit. Optionally, hybrid superconductive device comprises at least one passage located within said magnetic flux. The passage conducts a material flow comprising components magnetically separable by said magnetic flux.Type: ApplicationFiled: October 29, 2020Publication date: March 11, 2021Inventors: Shuki WOLFUS, Alexander FRIEDMAN, Yakov NIKULSHIN, Eliezer PEREL, Yosef YESHURUN
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Patent number: 10867731Abstract: A hybrid superconductive device for stabilizing an electric grid comprises (a) a magnetic core arrangement at least partially carrying an AC winding the AC winding connectable to an AC circuit for a current to be limited in the event of a fault; (b) at least one superconductive coil configured for storing electromagnetic energy; the superconductive coil magnetically coupled with the core arrangement and saturating the magnetic core arrangement during use. The hybrid superconductive device further comprises a switch unit preprogrammed for switching electric current patterns corresponding to the following modes: at least partially charging the superconductive coil; a standby mode when the superconductive coil is looped back; and at least partially discharging the superconductive coil into the circuit. Optionally, hybrid superconductive device comprises at least one passage located within said magnetic flux. The passage conducts a material flow comprising components magnetically separable by said magnetic flux.Type: GrantFiled: August 18, 2016Date of Patent: December 15, 2020Inventors: Shuki Wolfus, Yosef Yeshurun, Amizur Kafri
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Publication number: 20180308611Abstract: A hybrid superconductive device for stabilizing an electric grid comprises (a) a magnetic core arrangement at least partially carrying an AC winding the AC winding connectable to an AC circuit for a current to be limited in the event of a fault; (b) at least one superconductive coil configured for storing electromagnetic energy; the superconductive coil magnetically coupled with the core arrangement and saturating the magnetic core arrangement during use. The hybrid superconductive device further comprises a switch unit preprogrammed for switching electric current patterns corresponding to the following modes: at least partially charging the superconductive coil; a standby mode when the superconductive coil is looped back; and at least partially discharging the superconductive coil into the circuit. Optionally, hybrid superconductive device comprises at least one passage located within said magnetic flux. The passage conducts a material flow comprising components magnetically separable by said magnetic flux.Type: ApplicationFiled: August 18, 2016Publication date: October 25, 2018Inventors: Shuki WOLFUS, Yosef YESHURUN, Amizur KAFRI
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Patent number: 9230731Abstract: A three-phase current limiter (30) for an alternating current system includes an AC magnetic circuit having at least one AC coil (35R1, 35S1, 35T1) for each phase of a 3-phase AC supply wound on a saturable ferromagnetic core and configured to subject respective AC coils for each phase to a common magnetic flux, and a DC magnetic circuit (34a, 34b) for biasing the AC magnetic circuit into saturation at normal conditions. In use the AC coils are connected in series with a load and during alternate half cycles of the AC supply at least one of the AC coils produces a magnetic field that opposes a magnetic field of the DC magnetic circuit. The AC coils (35R, 35S, 35T) for each phase are configured so that at least one of the AC coils exhibits unbalanced magnetic impedance relative to remaining ones of the AC coils for each phase.Type: GrantFiled: August 31, 2010Date of Patent: January 5, 2016Assignees: BAR ILAN Research & Development Company, RICOR Cryogenic & Vacuum Systems Limited PartnershipInventors: Shuki Wolfus, Yossef Yeshurun, Alexander Friedman, Vladimir Rozenshtein, Zvi Bar-Haim
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Patent number: 8351167Abstract: A current limiting device (30, 40, 50, 60) comprising for each phase of an AC supply a closed magnetic core (31) of reduced volume and mass having first and second pairs of opposing limbs (32a, 32b; 33a, 33b), and at least one AC coil (35a, 35b) enclosing opposing limbs (33a, 33b) of the magnetic core (31) and adapted for series connection with a load. A superconducting DC bias coil (34) encloses a limb) (32a, 32b) of the magnetic core (31) for saturating each of the opposing limbs (33a, 33b) in opposite directions by the bias coil (34). Under fault conditions, the AC flux in at least one limb counteracts the DC bias flux, bringing the limb out of saturation. Preferably, current is reduced in the DC bias coils thus bringing both opposing limbs of the core out of saturation.Type: GrantFiled: September 7, 2005Date of Patent: January 8, 2013Assignees: Bar Ilan University, Ricor Cryogenic & Vacuum SystemsInventors: Shuki Wolfus, Alexander Friedman, Yosef Yeshurun, Vladimir Rozenshtein, Zvi Bar-Haim
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Publication number: 20120153927Abstract: A three-phase current limiter (30) for an alternating current system includes an AC magnetic circuit having at least one AC coil (35R1, 35S1, 35T1) for each phase of a 3-phase AC supply wound on a saturable ferromagnetic core and configured to subject respective AC coils for each phase to a common magnetic flux, and a DC magnetic circuit (34a, 34b) for biasing the AC magnetic circuit into saturation at normal conditions. In use the AC coils are connected in series with a load and during alternate half cycles of the AC supply at least one of the AC coils produces a magnetic field that opposes a magnetic field of the DC magnetic circuit. The AC coils (35R, 35S, 35T) for each phase are configured so that at least one of the AC coils exhibits unbalanced magnetic impedance relative to remaining ones of the AC coils for each phase.Type: ApplicationFiled: August 31, 2010Publication date: June 21, 2012Applicant: BAR ILAN RESEARCH & DEVELOPMENT COMPANY LTD.Inventors: Shuki Wolfus, Yossef Yeshurun, Alexander Friedman, Vladimir Rozenshtein, Zvi Bar-Haim
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Publication number: 20120154966Abstract: A current limiting device (30, 40, 50, 60) comprising for each phase of an AC supply a closed magnetic core (31) of reduced volume and mass having first and second pairs of opposing limbs (32a, 32b; 33a, 33b), and at least one AC coil (35a, 35b) enclosing opposing limbs (33a, 33b) of the magnetic core (31) and adapted for series connection with a load. A non-superconducting DC bias coil (34) typically formed of copper encloses a limb (32a, 32b) of the magnetic core (31) for saturating each of the opposing limbs (33a, 33b) in opposite directions by the bias coil (34). Under fault conditions, the AC flux in at least one limb counteracts the DC bias flux, bringing the limb out of saturation. Preferably, current is reduced in the DC bias coils thus bringing both opposing limbs of the core out of saturation.Type: ApplicationFiled: August 31, 2010Publication date: June 21, 2012Applicants: RICOR CRYOGENIC & VACUUM SYSTEMS LIMITED PARTNERSHIP, BAR ILAN RESEARCH & DEVELOPMENT COMPANY LTD.Inventors: Shuki Wolfus, Yossef Yeshurun, Alexander Friedman, Vladimir Rozenshtein, Zvi Bar-Haim
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Publication number: 20090021875Abstract: A current limiting device (30, 40, 50, 60) comprising for each phase of an AC supply a closed magnetic core (31) of reduced volume and mass having first and second pairs of opposing limbs (32a, 32b; 33a, 33b), and at least one AC coil (35a, 35b) enclosing opposing limbs (33a, 33b) of the magnetic core (31) and adapted for series connection with a load. A superconducting DC bias coil (34) encloses a limb) (32a, 32b) of the magnetic core (31) for saturating each of the opposing limbs (33a, 33b) in opposite directions by the bias coil (34). Under fault conditions, the AC flux in at least one limb counteracts the DC bias flux, bringing the limb out of saturation. Preferably, current is reduced in the DC bias coils thus bringing both opposing limbs of the core out of saturation.Type: ApplicationFiled: September 7, 2005Publication date: January 22, 2009Applicants: BAR ILAN UNIVERSITY, RICOR CRYOGENIC & VACUUM SYSTEMSInventors: Shuki Wolfus, Alexander Friedman, Yosef Yeshurun, Vladimir Rozenshtein, Zvi Bar-Haim
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Publication number: 20060158803Abstract: A superconducting short circuit current limiter (40a) for an alternating current system includes AC reactors having superconducting direct current bias windings (4a, 4b) that at normal conditions maintain the reactor's cores in saturated state. There are at least two AC coils (3a, 3b) for each phase operating at opposite half periods or at both half periods. The reactor may also have an additional feedback coil (42a, 42b) that at least partly compensates for the bias field of the superconducting coil at fault conditions enhancing a limiting capacity of the reactor. The reactor's core can be configured for decreasing its dimensions and mass as compared with known devices and for decreasing core losses. High voltage/high current devices include several standard modules connected in series or/and in parallel. A positional relationship of the modules is defined for decreasing necessary numbers of Amp?re-turns of superconducting and non-superconducting coils.Type: ApplicationFiled: January 27, 2004Publication date: July 20, 2006Applicant: Bar ILan UniversityInventors: Alexander Friedman, Moshe Zarudi, Noam Shaked, Shuki Wolfus, Moshe Sinvani, Yosef Yeshurun
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Publication number: 20060071747Abstract: A superconducting coil having form of pancake or double pancake wound of non-insulated superconducting wire (tape) with insulating layer between adjacent turns composed of epoxy resin filled with ceramic powder of high thermal conductivity. A superconducting coil composed of several pancakes and/or double pancakes and includes layers of said epoxy with or without additional spacers between adjacent pancakes. Pancakes or double pancakes as well as coils, consisting of several pancakes and/or double pancakes that have a solenoid form or racetrack or saddle forms.Type: ApplicationFiled: September 30, 2005Publication date: April 6, 2006Applicants: Bar Ilan University, RICOR Cryogenic & Vacuum SystemsInventors: Alexander Friedman, Shuki Wolfus, Yosef Yeshurun, Zvi Bar-Haim