# US 2021/0241967 A1 · Inductor mounting apparatus and method of use thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0241967 A1 - Document ID: US20210241967A1 - Status: Published application - Kind: A1 - Application number: 17/235,799 - Filed: 2021-04-20 - Published: 2021-08-05 - Earliest claimed: 2007-04-05 - Assignees: CTM Magnetics, Inc. - Inventors: Corey Jones; Steve Schiffer; Grant A. MacLennan; Hans Wennerstrom - Web page: https://patentgrep.com/patent/US20210241967A1 ## CPC - H01F 27/2895: {Windings disposed upon ring cores} - H01F 27/085: {Cooling by ambient air} - H01F 27/10: Liquid cooling - H01F 27/255: made from particles (H01F27/26 takes precedence) - H01F 27/266: {Fastening or mounting the core on casing or support (on coil H01F27/30)} - H01F 27/2823: {Wires (H01F27/2866 takes precedence)} - H01F 27/2876: {Cooling (cooling transformers and inductances in general H01F27/08)} - H01F 27/306: {Fastening or mounting coils or windings on core, casing or other support} - H01F 27/324: {Insulation between coil and core, between different winding sections, around the coil; Other insulation structures} - H01F 37/00: Fixed inductances not covered by group H01F17/00 - H01F 41/0206: {Manufacturing of magnetic cores by mechanical means (magnetic cores per se H01F27/24)} - H02M 1/126: {using passive filters} - H02M 1/44: Circuits or arrangements for compensating for electromagnetic interference in converters or inverters - H01F 1/24: the particles being insulated - H01F 27/06: Mounting, supporting, or suspending transformers, reactors, or choke coils {not being of the signal type} - H01F 27/08: Cooling (heat-transfer elements F28F); Ventilating (structural details of casings H01F27/02) - H01G 4/38: Multiple capacitors, i.e. structural combinations of fixed capacitors - H01G 4/40: Structural combinations of fixed capacitors with other electric elements, the structure mainly consisting of a capacitor, e.g. RC combinations - H02M 1/123: {Suppression of common mode voltage or current} - H05K 3/301: {by means of a mounting structure (H05K3/325 takes precedence)} - H05K 9/0032: {having multiple parts, e.g. frames mating with lids} - Y02B 70/10: Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes - 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) - H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract The invention comprises a method for fastening an inductor, comprising an aperture therethrough, to a mounting surface with a set of at least two mechanical straps and a strap force of ten to one hundred pounds of force per strap, the step of fastening further comprising the step of: passing at least a first portion of each of a first and second mechanical strap of the set of mechanical straps through the aperture and on opposing sides of the aperture, the first portion comprising a non-conductive material, where the inductor winding is fabricated during installation and/or the inductor is a component of a harmonic filter magnetically isolating and filtering individual phases of three phase power. ## Claims ### Claim 1 A method for mounting an inductor, comprising the steps of: fastening an inductor, comprising an aperture therethrough, to a mounting surface with a set of at least two mechanical straps and a strap force of ten to one hundred pounds of force, said step of fastening further comprising the step of: passing at least a first portion of a first mechanical strap of said set of mechanical straps through said aperture, said first portion comprising a non-conductive material. ### Claim 2 (depends on 1) The method of claim 1, said step of fastening further comprising the step of: passing at least a second portion of a second mechanical strap, of said set of mechanical straps, through said aperture, said first portion of said first mechanical strap, a center of said aperture, and said portion of said second mechanical strap forming an angle of greater than eighty degrees. ### Claim 3 (depends on 2) The method of claim 2, further comprising the step of: applying said strap force to each of said first mechanical strap and said second mechanical strap. ### Claim 4 (depends on 3) The method of claim 3, said step of fastening further comprising the step of: strapping a face of said inductor to said mounting surface. ### Claim 5 (depends on 1) The method of claim 1, said step of fastening further comprising the step of: forming an attachment between said inductor and said mounting plate with at least one of: a bolt; a pultruded strap; a fiber reinforced plastic; and a fiberglass-reinforced thermoset polyester resin. ### Claim 6 (depends on 1) The method of claim 1, further comprising the steps of: mounting a first set of at least three inductors to a first mounting rack in a cabinet, wherein first apertures of said first set of at least three inductors, form a first triangle on said first rack, said first set of at least three inductors comprising said inductor; mounting a second set of at least three inductors to a second mounting rack in said cabinet, wherein second apertures of said second set of at least inductors, form a second triangle on said second rack, said first triangle rotated by at least twenty degrees relative to said second triangle; flowing air, driven by a fan, through said first apertures and said second apertures within said cabinet; and a harmonic circuit comprising said first set of at least three inductors, said second set of at least three inductors, and a delta filter. ### Claim 7 (depends on 6) The method of claim 6, said step of fastening further comprising the step of: applying said strap force to each inductor of said first set of at least three inductors. ### Claim 8 (depends on 1) The method of claim 1, further comprising the step of: fabricating said inductor with a winding comprising a plurality of turn sections first electrically joined to each other during manufacturing. ### Claim 9 (depends on 8) The method of claim 8, said step of fabricating further comprising the step of: first electrically joining a first turn of said winding to a second turn of said winding in a step of winding an inductor core of said inductor. ### Claim 10 (depends on 9) The method of claim 9, further comprising the step of: filtering a three phase power with a harmonic filter, said harmonic filter comprising: a delta circuit comprising: a first leg connecting a first apex to a second apex, a second leg connecting said second apex to a third apex, and a third leg connecting said third apex to said first apex; and a first capacitor and a second capacitor wired in parallel within said first leg of said delta circuit, said inductor electrically positioned between an input of a first phase of the three phase power and said first apex. ### Claim 11 (depends on 1) The method of claim 1 further comprising the step of: magnetically isolating individual phases of three-phase power with a harmonic filter, said harmonic filter comprising said inductor. ### Claim 12 (depends on 11) The method of claim 11, further comprising the step of: alternatingly connecting and disconnecting a delta circuit of said harmonic filter from the three phase power by alternatingly closing and opening at least two contactors within said delta circuit. ### Claim 13 (depends on 12) The method of claim 12, further comprising the steps of: filtering the three phase power with said harmonic filter, said harmonic filter comprising: a delta circuit comprising: a first leg connecting a first apex to a second apex, a second leg connecting said second apex to a third apex, and a third leg connecting said third apex to said first apex; a first contactor, in said first leg of said delta circuit, comprising a rating of less than one hundred fifty amperes, said three phase power exceeding four hundred amperes; and a second contactor in said second leg of said delta circuit; and electrically coupling a first phase of the three phase power to said delta circuit via said inductor. ### Claim 14 (depends on 12) The method of claim 12, further comprising the steps of: filtering the three phase power with said harmonic filter, said harmonic filter comprising: a delta circuit comprising: a first leg connecting a first apex to a second apex, a second leg connecting said second apex to a third apex, and a third leg connecting said third apex to said first apex; a first contactor electrically in parallel with a second contactor, in said first leg of said delta circuit, each of said first contactor and said second contactor comprising a rating of less than one hundred amperes, the three phase power exceeding four hundred fifty amperes; and electrically coupling a first phase of the three phase power to said delta circuit via said inductor. ### Claim 15 An apparatus for filtering three-phase power, comprising: a set of mechanical straps, at least a portion of a first member of said mechanical strap comprising a non-conductive material; and an inductor fastened to a mounting surface with said first member of said set of mechanical straps with a strap force of ten to one hundred pounds of force, said non-conductive material passing through an aperture circumferentially surrounded by a core of said inductor. ### Claim 16 (depends on 15) The apparatus of claim 15, said first member comprising at least one of: a non-conductive bolt; a pultruded strap; a fiber reinforced plastic; and a fiberglass-reinforced thermoset polyester resin. ### Claim 17 (depends on 16) The apparatus of claim 16, said set of mechanical straps further comprising: a second member passing through said aperture, said first strap, a center of said aperture, and said second strap forming an angle larger than eighty degrees. ### Claim 18 (depends on 17) The apparatus of claim 17, said core further comprising an axis passing through said aperture that does not contact said inductor and, relative to the axis, said core comprising non-infinite rotational symmetry and at least one of: no rotational symmetry; C2 rotational symmetry; C3 rotational symmetry; and C4 rotational symmetry.