# US 2018/0025838 A1 · Inductor, in particular for magnetically coupled energy transfer, as well as method for operating an inductor of this type > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0025838 A1 - Document ID: US20180025838A1 - Status: Published application - Kind: A1 - Application number: 15/548,972 - Filed: 2016-02-01 - Published: 2018-01-25 - Earliest claimed: 2015-02-05 - Assignees: Würth Elektronik eiSos GmbH & Co. KG - Applicants: Würth Elektronik eiSos GmbH & Co. KG - Inventors: Cem SOM - Web page: https://patentgrep.com/patent/US20180025838A1 ## CPC - H01F 38/14: Inductive couplings - H01F 27/24: Magnetic cores - H01F 27/28: Coils; Windings; Conductive connections - H01F 27/346: {Preventing or reducing leakage fields (using magnetic shields H01F27/36; using auxiliary windings H01F27/38)} - H02J 50/10: using inductive coupling - H05B 6/062: {for cooking plates or the like} - H05B 6/1254: {using conductive pieces to direct the induced magnetic field} - H05B 6/1272: {with more than one coil or coil segment per heating zone} - H05B 2206/022: Special supports for the induction coils - Y02B 40/00: Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract An inductor, in particular for magnetically coupled energy transfer, includes a coil carrier on which a first coil and a second coil are arranged. The second coil has an outer diameter D2 that is greater than an outer diameter D1 of the first coil. A magnetic core surrounds a longitudinal center axis of the first coil. The first coil is operated with a first operating frequency in a first power range, whereas the second coil is operated independently of the first coil with a second operating frequency in a second power range. As a result applications can be run in a simple and flexible manner in a low-power range and in a high-power range. ## Claims ### Claim 1 An inductor, comprising: a coil carriers; a first coil arranged on the coil carrier for energy transfer in a first power range, the first coil having a first outer diameters; a second coil arranged on the coil carrier for energy transfer in a second power range, the second coil having a second outer diameter, wherein the second outer diameter is larger than the first outer diameters; a magnetic core surrounding a longitudinal center axis of the first coil. ### Claim 2 (depends on 1) An inductor as claimed in claim 1, further comprising a control unit that is designed such that the first coil and the second coil are operated independently of one another. ### Claim 3 (depends on 1) An inductor as claimed in claim 1, further comprising a control unit that is designed such that the first coil is operated with a first operating frequency the first operating frequency being greater than or equal to 100 kHZ and less than or equal to 220 kHz. ### Claim 4 (depends on 1) An inductor as claimed in claim 1, further comprising a control unit that is designed such that the second coil is operated with a second operating frequency the second operating frequency being greater than or equal to 40 kHz and less than or equal to 250 kHz. ### Claim 5 (depends on 1) An inductor as claimed in claim 1, further comprising a third coil arranged on the coil carrier, the third coil having an outer diameter that is greater than the second outer diameter. ### Claim 6 (depends on 1) An inductor as claimed in claim 1, wherein the magnetic core is designed in one piece. ### Claim 7 (depends on 1) An inductor as claimed in claim 1, wherein the magnetic core is composed of a plurality of core elements. ### Claim 8 (depends on 1) An inductor as claimed in claim 1, wherein the magnetic core surrounds the first coil. ### Claim 9 (depends on 1) An inductor as claimed in claim 1, wherein at least one of the magnetic core, the first coil and the second coil are arranged on a first face of the coil carrier. ### Claim 10 (depends on 1) An inductor as claimed in claim 1, further comprising a plurality of magnetic rods that are arranged radially to the longitudinal center axis of the first coil. ### Claim 11 (depends on 1) An inductor as claimed in claim 1, wherein a plurality of magnetic rods are arranged on a second face of the coil carrier. ### Claim 12 (depends on 10) An inductor as claimed in claim 10, wherein the magnetic rods extend into a receptacle region of at least one of the second coil and a third coil. ### Claim 13 (depends on 1) An inductor as claimed in claim 1, wherein the coil carrier has a plurality of apertures for cooling at least one of the second coil and a third coil. ### Claim 14 (depends on 1) An inductor as claimed in claim 1, wherein at least one of the first coil and the second coil is spiral in design. ### Claim 15 A method for the operation of an inductor, the method comprising the steps of: providing an inductor with a first coil and a second coil and a magnetic core that surrounds a longitudinal center axis of the first coil; operating the first coil with a first operating frequency in a first power range; and operating the second coil independently of the first coil with a second operating frequency in a second power range. ### Claim 16 (depends on 8) An inductor as claimed in claim 8, wherein the magnetic core is arranged between the first coil and the second coil.