# US 9,882,506 B2 · Multiple inductive component > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,882,506 B2 - Document ID: US9882506B2 - Status: Granted - Kind: B2 - Application number: 14/781,094 - Filed: 2014-03-17 - Published: 2016-02-18 - Granted: 2018-01-30 - Earliest claimed: 2013-03-29 - Assignees: Philips Lighting Holding B.V. - Applicants: Philips Lighting Holding B.V. - Inventors: Bernd Ackermann; Reinhold Elferich; David Llewellyn John - Web page: https://patentgrep.com/patent/US9882506B2 ## CPC - H05B 45/375: using buck topology - H01F 3/14: Constrictions; Gaps, e.g. air-gaps (in magnetic shunt paths H01F3/12) - H01F 17/045: {with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core} - H01F 17/06: with core substantially closed in itself, e.g. toroid - H01F 27/24: Magnetic cores - H01F 27/26: Fastening parts of the core together; Fastening or mounting the core on casing or support (on coil H01F27/30) - H01F 27/2823: {Wires (H01F27/2866 takes precedence)} - H02M 1/42: Circuits or arrangements for compensating for or adjusting power factor in converters or inverters - H02M 7/06: using discharge tubes without control electrode or semiconductor devices without control electrode - H05B 45/38: using boost topology - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) ## Abstract A multiple inductive component (100) comprises:—a cylindrical drum core component (120) with at least two axially spaced circumferential grooves (131, 132) in its cylindrical outer surface (121), a separation disc portion (111) between said two circumferential grooves and two outer disc portions (112, 113) at the sides of the said two circumferential grooves, respectively, directed away from the separation disc portion;—at least one first winding (141) arranged in a first one (131) of said grooves;—at least one second winding (142) arranged in a second one (132) of said grooves;—a cylindrical shell core component (150) arranged coaxially around the cylindrical drum core component;—two outer air gaps (162, 163) between the cylindrical shell core component and said two outer disc portions, respectively. The separation disc portion is magnetically short circuited with the cylindrical shell core component. ## Claims ### Claim 1 A device, comprising: a cylindrical drum core component with a cylindrical outer surface and at least two axially spaced circumferential grooves in the cylindrical outer surface, the cylindrical drum core component comprising a separation disc portion between the at least two axially spaced circumferential grooves and two outer disc portions at the sides of the at least two axially spaced circumferential grooves, respectively, directed away from the separation disc portion; a first winding arranged in a first axially spaced circumferential groove; second winding arranged in a second axially space circumferential groove; a cylindrical shell core component arranged coaxially around the cylindrical drum core component; an annular core component disposed between the cylindrical shell core component and the separation disc portion of the cylindrical drum core component; and two outer air gaps between the cylindrical shell core component and the two outer disc portions, respectively, wherein the separation disc portion is (i) magnetically short circuited with the cylindrical shell core component, or (ii) separated from the cylindrical shell core component by a central air gap narrower than a narrowest air gap of the two outer air gaps such that the first winding and the second winding are magnetically separated. ### Claim 2 (depends on 1) The device of claim 1, wherein the annular core component is formed with the cylindrical drum core component. ### Claim 3 (depends on 1) The device of claim 1, wherein an outer diameter of the separation disc portion of the drum core component is equal to or less than an inner diameter of the cylindrical shell core component at an axial position of the separation disc portion. ### Claim 4 (depends on 3) The device of claim 3, wherein the outer diameter of the separation disc portion is larger than an outer diameter of a smallest one of the two outer disc portions, and wherein the outer diameter of the separation disc portion is larger than an outer diameter of a largest one of the two outer disc portions. ### Claim 5 (depends on 3) The device of claim 3, wherein, at an axial position of the separation disc portion, the cylindrical shell core component comprising an inner surface that includes an inward annular projection. ### Claim 6 (depends on 5) The device of claim 5, wherein an inner diameter of the inward annular projection of the cylindrical shell core component is larger than an outer diameter of a smallest one of the two outer disc portions, and wherein an inner diameter of the inward annular projection of the cylindrical shell core component is larger than an outer diameter of the largest one of the two outer disc portions. ### Claim 7 (depends on 1) The device of claim 1, wherein at least one of the axially spaced circumferential grooves contains two or more windings. ### Claim 8 (depends on 1) The device of claim 1, further comprising at least one separate groove containing one or more windings. ### Claim 9 (depends on 1) The device of claim 1, comprising a first inductive component and a second inductive component operating independently from each other, wherein the first winding corresponds to the first inductive component and the second winding corresponds to the second inductive component. ### Claim 10 (depends on 9) The device of claim 9, wherein the first inductive component is one of an inductor of a power stage, an inductor of a filter stage, an inductor of a resonant stage, a transformer, and a coupled inductor, and wherein the second inductive component comprises at least one of an inductor of a power stage, an inductor of a filter stage, or is an inductor of a resonant stage, a transformer, and a coupled inductor. ### Claim 11 (depends on 1) The device of claim 1, further comprising a switch-mode converter. ### Claim 12 (depends on 11) The device of claim 11, further comprising: a power factor correction (PFC) stage including a first inductor and a DC/DC stage including a second inductor operating independently from the first inductor, wherein the first winding corresponds to the first inductor and the second winding corresponds to the second inductor. ### Claim 13 (depends on 11) The device of claim 11, further comprising: a light emitting diode (LED) driver including the switch-mode converter. ### Claim 14 (depends on 13) The device of claim 13, further comprising: an LED retrofit lamp including the LED driver. ### Claim 15 A device, comprising: a cylindrical magnetic drum core component with a cylindrical outer surface and two axially spaced circumferential grooves in the cylindrical outer surface; a separation disc portion between the at least two circumferential grooves; two outer disc portions adjacent to the two circumferential grooves, respectively, directed away from the separation disc portion; a first electrically conductive winding disposed in a first circumferential groove; a second electrically conductive winding disposed in a second circumferential groove; a cylindrical magnetic shell core component arranged coaxially around the cylindrical magnetic drum core component; an annular core component between the cylindrical magnetic shell core component and the separation disc portion of the cylindrical magnetic drum core component; and two outer air gaps between the cylindrical magnetic shell core component and the two outer disc portions, respectively, wherein the separation disc portion is magnetically short circuited with the cylindrical magnetic shell core component such that the first electrically conductive winding and the second electrically conductive winding are magnetically separated from each other. ### Claim 16 (depends on 15) The device of claim 15, wherein the annular core component is formed to the cylindrical magnetic shell core component or the cylindrical magnetic drum core component. ### Claim 17 (depends on 15) The device of claim 15, comprising a first inductive component and a second inductive component operating independently from each other, wherein the first electrically conductive winding corresponds to the first inductive component and the second electrically conductive winding corresponds to the second inductive component. ### Claim 18 A device, comprising: a cylindrical drum core component with a cylindrical outer surface and at least two axially spaced circumferential grooves in the cylindrical outer surface, the cylindrical drum core component comprising a separation disc portion between the at least two axially spaced circumferential grooves and two outer disc portions at the sides of the at least two axially spaced circumferential grooves, respectively, directed away from the separation disc portion; a first winding disposed in a first axially spaced circumferential groove; a second winding disposed in a second axially spaced circumferential groove; a cylindrical shell core component arranged coaxially around the cylindrical drum core component; an annular core component extending from the cylindrical shell core component or the separation disc portion of the cylindrical drum core component; and two outer air gaps between the cylindrical shell core component and the two outer disc portions, respectively, wherein (i) the separation disc portion is magnetically short circuited with the cylindrical magnetic shell core component such that the first winding and the second winding are magnetically separated from each other, (ii) an inner surface of the cylindrical shell core component is provided with an inward annular projection, and (iii) an inner diameter of the inward annular projection of the cylindrical shell core component is larger than an outer diameter of a smallest one of the two outer disc portions and larger than the outer diameter of a largest one of the two outer disc portions. ### Claim 19 (depends on 18) The device of claim 18, wherein the annular core component is part of the cylindrical shell core component. ### Claim 20 (depends on 18) The device of claim 18, wherein the annular core component is part of the cylindrical drum core component.