# US 11,309,123 B2 · Fully integrated inversely weakly coupled power inductor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,309,123 B2 - Document ID: US11309123B2 - Status: Granted - Kind: B2 - Application number: 17/115,883 - Filed: 2020-12-09 - Published: 2021-07-08 - Granted: 2022-04-19 - Earliest claimed: 2020-01-07 - Assignees: Schneider Electric It Corporation - Applicants: Schneider Electric It Corporation - Inventors: Robert Pasterczyk; Eric Lucien Brun - Web page: https://patentgrep.com/patent/US11309123B2 ## CPC - H01F 27/306: {Fastening or mounting coils or windings on core, casing or other support} - H01F 27/38: Auxiliary core members; Auxiliary coils or windings - H01F 27/06: Mounting, supporting, or suspending transformers, reactors, or choke coils {not being of the signal type} - H01F 27/385: {for reducing harmonics} - H01F 38/023: {of inductances} - H02M 1/0043: {Converters switched with a phase shift, i.e. interleaved (non-isolated DC/DC converters H02M3/1586)} - H02M 1/126: {using passive filters} - H02M 1/14: Arrangements for reducing ripples from DC input or output - H02M 1/44: Circuits or arrangements for compensating for electromagnetic interference in converters or inverters - H02M 7/003: {Constructional details, e.g. physical layout, assembly, wiring or busbar connections} - H02M 7/493: the static converters being arranged for operation in parallel - H02M 7/53871: {with automatic control of output voltage or current} - H01F 2038/026: {non-linear inductive arrangements for converters, e.g. with additional windings} - H02M 1/0064: {Magnetic structures combining different functions, e.g. storage, filtering or transformation} - H02M 1/0074: {Plural converter units whose inputs are connected in series} - H02M 7/487: Neutral point clamped inverters - H03H 7/427: {Common-mode filters (H02J3/01 and H02M1/126 takes precedence)} - 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) - H03H: IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (waveguides, resonators, lines or other devices of the waveguide type H01P) ## Abstract A filter assembly includes a first self-inductance core, a second self-inductance core, a coupled inductor core, and a first plurality of inductor coil windings. Each of the first plurality of inductor coil windings has a series of first turns in a vertically stacked relation around the first self-inductance core, and a series of second turns in a vertically stacked relation around the first self-inductance core and the coupled inductor core. The filter assembly further includes a second plurality of inductor coil windings. Each of the second plurality of inductor coil windings has a series of first turns in a vertically stacked relation around the second self-inductance core, and a series of second turns in a vertically stacked relation around the second self-inductance core and the coupled inductor core. ## Claims ### Claim 1 A filter assembly comprising: a first self-inductance core; a second self-inductance core; a coupled inductor core; a first plurality of inductor coil windings, each of the first plurality of inductor coil windings having a series of first turns in a vertically stacked relation around the first self-inductance core, and a series of second turns in a vertically stacked relation around the first self-inductance core and the coupled inductor core; and a second plurality of inductor coil windings, each of the second plurality of inductor coil windings having a series of first turns in a vertically stacked relation around the second self-inductance core, and a series of second turns in a vertically stacked relation around the second self-inductance core and the coupled inductor core, wherein the second turns of each of the first plurality of inductor coil windings are elongated turns and the second turns of each of the second plurality of inductor coil windings are elongated turns, and wherein the second turns of each of the first plurality of inductor coil windings and the second turns of each of the second plurality of inductor coil windings are positioned at a middle of the coil winding. ### Claim 2 (depends on 1) The filter assembly of claim 1, wherein the first self-inductance core, the second self-inductance core, and the coupled inductor core each include three limbs, one limb for each of three phases. ### Claim 3 (depends on 1) The filter assembly of claim 1, wherein the second turns of each of the first plurality of inductor coil windings and the second turns of each of the second plurality of inductor coil windings are every other turn. ### Claim 4 (depends on 1) The filter assembly of claim 1, wherein the first plurality of inductor coil windings is configured to electrically connect to a first inverter at a first terminal to receive an alternating current output from the first inverter and the second plurality of inductor coil windings is configured to electrically connect to a second inverter at a second terminal to receive an alternating current output from the second inverter. ### Claim 5 (depends on 4) The filter assembly of claim 4, wherein the first plurality of inductor coil windings is electrically connected to the second plurality of inductor coil windings at a third terminal configured to provide a combined alternating current from the first and second inverter. ### Claim 6 An inductor coil winding comprising: a first terminal; a series of first circular turns in a vertically stacked relation, the series of first circular turns leading in from the first terminal and having a diameter allowing for an opening within the series of first circular turns; a series of elongated turns in a vertically stacked relation, the series of elongated turns leading in from the series of first circular turns and having a length greater than the diameter of the series of circular turns, and allowing for an opening within the series of elongated turns; a series of second circular turns in a vertical stacked relation, the series of second circular turns leading in from the series of elongated turns and having a diameter allowing for an opening within the series of second circular turns, the openings of the first and second circular turns being aligned with one another; and a second terminal, the second terminal leading out form the series of second circular turns. ### Claim 7 (depends on 6) The inductor coil winding of claim 6, wherein the series of first circular turns and the series of second circular turns provide main inductance. ### Claim 8 (depends on 7) The inductor coil winding of claim 7, wherein the series of elongated turns provides coupled inductance. ### Claim 9 (depends on 8) The inductor coil winding of claim 8, wherein the first terminal is an input terminal electrically connected to an output of an inverter to receive current from the inverter. ### Claim 10 (depends on 6) The inductor coil winding of claim 6, further comprising a self-inductance core in the opening within the series of first circular turns and the series of second circular turns and a coupled core in the opening within the series of elongated turns, the coupled core being configured to provide a magnetic coupling to another inductor coil winding. ### Claim 11 (depends on 6) The inductor coil winding of claim 6, wherein the series of elongated turns are located at a middle of the inductor coil winding. ### Claim 12 (depends on 11) The inductor coil winding of claim 11, wherein the series of elongated turns is achieved by every other turn. ### Claim 13 A method of assembling a filter assembly, the method comprising: interleaving a first inductor coil winding with a second inductor coil winding, each of the first and second inductor coil windings including a first terminal, a series of first circular turns in a vertically stacked relation, the series of first circular turns leading in from the first terminal and having a diameter allowing for an opening within the series of first circular turns, a series of elongated turns in a vertically stacked relation, the series of elongated turns leading in from the series of first circular turns and having a length greater than the diameter of the series of circular turns, and allowing for an opening within the series of elongated turns, a series of second circular turns in a vertical stacked relation, the series of second circular turns leading in from the series of elongated turns and having a diameter for allowing an opening within the series of second circular turns, the openings of the first and second circular turns being aligned with one another, and a second terminal, the second terminal leading out form the series of second circular turns; positioning a first self-inductance core in first and second openings of the first inductor coil winding; positioning a second self-inductance core in the first and second openings of the second inductor coil winding; and positioning a coupled inductor core in the opening within the series of elongated turns. ### Claim 14 A filter assembly comprising: a first self-inductance core; a second self-inductance core; a coupled inductor core; a first inductor coil winding having a series of first turns in a vertically stacked relation around the first self-inductance core and a series of second turns in a vertically stacked relation around the first self-inductance core and the coupled inductor core, the first inductor coil winding being wound in a first direction; a second inductor coil winding having a series of first turns in a vertically stacked relation around the second self-inductance core and a series of second turns in a vertically stacked relation around the second self-inductance core and the coupled inductor core, the second inductor coil winding being wound in a second direction, which is opposite the first direction; and a third inductor coil winding having a series of first turns in a vertically stacked relation around the first self-inductance core and a series of second turns in a vertically stacked relation around the first self-inductance core and the coupled inductor core, the third inductor coil winding being wound in a first direction, wherein the second inductor coil is positioned between the first inductor coil and the third inductor coil. ### Claim 15 (depends on 14) The filter assembly of claim 14, wherein the first self-inductance core, the second self-inductance core, and the coupled inductor core each include three limbs, one limb for each of three phases. ### Claim 16 (depends on 14) The filter assembly of claim 14, wherein the second turns of first inductor coil winding are elongated turns and the second turns of the second inductor coil winding are elongated turns. ### Claim 17 (depends on 16) The filter assembly of claim 16, wherein the second turns of the first inductor coil winding and the second turns of the second inductor coil winding are positioned at a middle of the coil winding, and the second turns of the first inductor coil winding and the second turns of the second inductor coil winding are every other turn. ### Claim 18 (depends on 14) The filter assembly of claim 14, wherein the first inductor coil winding is configured to electrically connect to a first inverter at a first terminal to receive an alternating current output from the first inverter and the second inductor coil winding is configured to electrically connect to a second inverter at a second terminal to receive an alternating current output from the second inverter.