Patents by Inventor Daniel Sadarnac
Daniel Sadarnac 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: 11145454Abstract: The invention relates to an electrical transformer (T, T?) comprising: a primary central winding (11a) extending around an axis (X) and configured to generate a central magnetic flux when a current is passed through it circulating in a first direction around the axis (X), two peripheral primary windings (12a, 13a) extending around the axis (X), between which the central primary winding (11a) is located, and configured to generate peripheral magnetic fluxes when currents are passed through same respectively circulating in a second direction around the axis (X) which is opposite to the first direction, the peripheral magnetic fluxes superimposing on the central magnetic flux, wherein the windings are further configured in such a way that the peripheral magnetic fluxes compensate the central magnetic flux in the regions located beyond the peripheral windings.Type: GrantFiled: March 27, 2017Date of Patent: October 12, 2021Assignee: SAFRAN ELECTRONICS & DEFENSEInventors: Sébastien Fontaine, Daniel Sadarnac, Charif Karimi
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Publication number: 20190385782Abstract: The invention relates to an electrical transformer (T, T?) comprising: a primary central winding (11a) extending around an axis (X) and configured to generate a central magnetic flux when a current is passed through it circulating in a first direction around the axis (X), two peripheral primary windings (12a, 13a) extending around the axis (X), between which the central primary winding (11a) is located, and configured to generate peripheral magnetic fluxes when currents are passed through same respectively circulating in a second direction around the axis (X) which is opposite to the first direction, the peripheral magnetic fluxes superimposing on the central magnetic flux, wherein the windings are further configured in such a way that the peripheral magnetic fluxes compensate the central magnetic flux in the regions located beyond the peripheral windings.Type: ApplicationFiled: March 27, 2017Publication date: December 19, 2019Applicant: SAFRAN ELECTRONICS & DEFENSEInventors: Sébastien FONTAINE, Daniel SADARNAC, Charif KARIMI
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Patent number: 8823188Abstract: The device includes, in a housing, an actuator electrically connected to a battery for charging a portable item such as a mobile terminal. For a rotating actuator comprising a first member submitted to an oscillatory motion, for example a walker carrying the housing, and a second member making up at least partially a mass part, the mass part is able to oscillate around the axle of the armature with respect to the first member. A servo control system can control the actuator sometimes as a motor supplied by the battery or by allowing the mass part to move freely, sometimes as a generator charging the battery, by slaving the motion speed of the mass part to the acceleration of the oscillatory motion of the first member. This enables to recover as much electric power as possible from the walker.Type: GrantFiled: April 17, 2009Date of Patent: September 2, 2014Assignee: OrangeInventors: Daniel Sadarnac, Didier Marquet
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Patent number: 8421570Abstract: The transformer ensures the transmission of electrical power by electromagnetic induction between the first (11) and second (12) coils concentrically arranged on the first (7) and second (8) tubular parts respectively, which are made of a ferromagnetic material, and coaxially mounted in such a way that an outer surface (13a, 13b, 13c) of one part can rotate in relation to an inner surface (14a, 14b, 14c) of the other. These surfaces each consist of two straight cylindrical rotation surfaces (13a, 13c; 14a, 14c) of different diameters, each extending from one of the axial ends of the part (7; 8) to an intermediate radial shoulder (13b, 14b) for connecting these surfaces. The parts (7; 8) are arranged head-to-foot one inside the other so as to delimit, between the shoulders (13b; 14b), an annular space receiving the coils (11, 12), between two annular gaps each delimited by two (13a, 14a; 13b, 14b) of the facing cylindrical surfaces of the first (7) and second (8) parts.Type: GrantFiled: October 24, 2006Date of Patent: April 16, 2013Assignee: Centre National d'Etudes SpatialesInventors: Denis Schwander, Michel Privat, Francois Dugue, Daniel Sadarnac
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Publication number: 20110037260Abstract: The device includes, in a housing, an actuator electrically connected to a battery for charging a portable item such as a mobile terminal. For a rotating actuator comprising a first member submitted to an oscillatory motion, for example a walker carrying the housing, and a second member making up at least partially a mass part, the mass part is able to oscillate around the axle of the armature with respect to the first member. A servo control system can control the actuator sometimes as a motor supplied by the battery or by allowing the mass part to move freely, sometimes as a generator charging the battery, by slaving the motion speed of the mass part to the acceleration of the oscillatory motion of the first member. This enables to recover as much electric power as possible from the walker.Type: ApplicationFiled: April 17, 2009Publication date: February 17, 2011Applicant: FRANCE TELECOMInventors: Daniel Sadarnac, Didier Marquet
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Publication number: 20090295523Abstract: The transformer ensures the transmission of electrical power by electromagnetic induction between the first (11) and second (12) coils concentrically arranged on the first (7) and second (8) tubular parts respectively, which are made of a ferromagnetic material, and coaxially mounted in such a way that an outer surface (13a, 13b, 13c) of one part can rotate in relation to an inner surface (14a, 14b, 14c) of the other. These surfaces each consist of two straight cylindrical rotation surfaces (13a, 13c; 14a, 14c) of different diameters, each extending from one of the axial ends of the part (7; 8) to an intermediate radial shoulder (13b, 14b) for connecting these surfaces. The parts (7; 8) are arranged head-to-foot one inside the other so as to delimit, between the shoulders (13b; 14b), an annular space receiving the coils (11, 12), between two annular gaps each delimited by two (13a, 14a; 13b, 14b) of the facing cylindrical surfaces of the first (7) and second (8) parts.Type: ApplicationFiled: October 24, 2006Publication date: December 3, 2009Inventors: Denis Schwander, Michel Privat, Francois Dugue, Daniel Sadarnac
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Patent number: 5646836Abstract: A switch mode power supply comprises at least one bridge arm including two switching cells in series receiving a direct current voltage to be switched. Each switching cell includes a switching arrangement in parallel with a capacitor and a protection diode. The switching arrangement is alternately closed and opened to supply an alternating current voltage at a switching frequency applied to a load one terminal of which is connected to the common point of the switching cells. A pulsed current source including a saturable inductor is connected to the common point. The saturable inductor is provided by a device including a primary circuit with two windings and a secondary circuit including a single winding to which a direct current source is connected. The windings are wound on a magnetic core and the windings of the primary circuit are connected in parallel and wound in opposite directions. A capacitor is connected in series with the saturable inductor.Type: GrantFiled: April 10, 1996Date of Patent: July 8, 1997Assignee: Alcatel ConvertersInventors: Daniel Sadarnac, Sylvain D'Almeida
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Patent number: 5627743Abstract: A chopper power supply of the invention includes a bridge arm constituted by two switching sections in series and receiving a DC voltage. Each switching section includes switching means in parallel with a capacitor, the switching means being controlled so as to supply an AC voltage to a load. A pulse current source is connected to the load, the pulse current source being constituted by an LC-type circuit dimensioned so that the current flowing through the circuit is delayed by .pi./2 relative to the voltage applied to the load so as to deliver current pulses for alternately charging and discharging each of the capacitors on the edges of the AC voltage.Type: GrantFiled: March 2, 1995Date of Patent: May 6, 1997Assignee: Alcatel ConvertersInventors: Daniel Sadarnac, Sylvain d'Almeida