# US 2019/0319600 A1 · Matching Networks, Inductors, and Coupled-Inductor Capacitive Wireless Power Transfer Circuit and Related Techniques > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0319600 A1 - Document ID: US20190319600A1 - Status: Published application - Kind: A1 - Application number: 16/357,291 - Filed: 2019-03-18 - Published: 2019-10-17 - Earliest claimed: 2018-03-16 - Assignees: The Regents of the University of Colorado - Applicants: The Regents of the University of Colorado, a body - Inventors: Khurram Afridi; Brandon Regensburger; Sreyam Sinha; Ashish Kumar - Web page: https://patentgrep.com/patent/US20190319600A1 ## CPC - H03H 7/38: Impedance-matching networks - B60L 5/005: {without mechanical contact between the collector and the power supply line} - B60L 5/42: for collecting current from individual contact pieces connected to the power supply line - B60L 53/12: Inductive energy transfer - B60L 53/32: {by charging in short intervals along the itinerary, e.g. during short stops} - H01F 27/2823: {Wires (H01F27/2866 takes precedence)} - H02J 50/05: using capacitive coupling - H01F 27/2847: {Sheets; Strips (H01F27/2866 takes precedence)} - H01F 27/2895: {Windings disposed upon ring cores} - H03H 7/09: Filters comprising mutual inductance - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors - Y02T 90/14: Plug-in electric vehicles - H03H: IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (waveguides, resonators, lines or other devices of the waveguide type H01P) - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract In one implementation, a matching network is provided comprising a pair of input terminals; a pair of output terminals; and at least two reactive components disposed between the pair of input terminals and the pair of output terminals. At least one of the reactive components comprises a coupled-inductor. In various implementations, the second reactive component can be a capacitor, and the capacitor can be at least partially realized using the parasitic capacitances of the environment. The matching network may be disposed in a capacitive wireless power transfer (WPT) system. In other implementations, inductors and coupled-inductors are further provided. In some implementations, for example, an inductor, such as but not limited to a coupled-inductor, may comprise a toroidal or semi-toroidal core comprising foil wire interleaved without notches. ## Claims ### Claim 1 A matching network comprising: a pair of input terminals; a pair of output terminals; at least two reactive components disposed between the pair of input terminals and the pair of output terminals, wherein one of the reactive components comprises a coupled-inductor. ### Claim 2 (depends on 1) The matching network of claim 1, wherein the second reactive component is a capacitor. ### Claim 3 (depends on 2) The matching network of claim 2, wherein the capacitor is at least partially realized using the parasitic capacitances of the environment. ### Claim 4 (depends on 1) The matching network of claim 1, wherein the matching network is disposed in a capacitive wireless power transfer (WPT) system. ### Claim 5 (depends on 4) The matching network of claim 4, wherein the coupled-inductor comprises flat wire. ### Claim 6 (depends on 1) The matching network of claim 1, wherein the coupled-inductor comprises flat wire. ### Claim 7 (depends on 1) The matching network of claim 1, wherein the coupled-inductor comprises two or more parallel windings. ### Claim 8 (depends on 2) The matching network of claim 2, wherein the coupled-inductor comprises two or more parallel windings. ### Claim 9 (depends on 1) The matching network of claim 1, wherein the coupled-inductor is wound on a semi-toroid core with interleaved-foil wire. ### Claim 10 (depends on 4) The matching network of claim 4, wherein the coupled-inductor is wound on a semi-toroid core with interleaved-foil wire. ### Claim 11 (depends on 1) The matching network of claim 1, wherein the coupled-inductor is wound on a toroid core with interleaved-foil wire. ### Claim 12 (depends on 4) The matching network of claim 4, wherein the coupled-inductor is wound on a toroid core with interleaved-foil wire. ### Claim 13 (depends on 1) The matching network of claim 1, wherein the matching network comprises a multi-stage matching network utilizing coupled inductors. ### Claim 14 (depends on 13) The matching network of claim 13, wherein the coupled inductors are coupled in-between the multiple stages of the matching network. ### Claim 15 A capacitive wireless power transfer (WPT) system adapted for providing wireless power transfer between a power source and a vehicle, the system comprising: a wireless power transfer circuit comprising two pairs of capacitive plates adapted to be coupled for capacitive wireless power transfer, wherein a first pair of the capacitive plates are disposed embedded in a roadway and a second pair of the capacitive plates are disposed in the vehicle chassis. ### Claim 16 (depends on 15) The capacitive wireless power transfer (WPT) system of claim 15, wherein power electronics on the source side are disposed to a side of the road and inductance of a wire that connects the source side power electronics to first pair of capacitive plates is used as part of a matching network. ### Claim 17 An inductor comprising a toroidal or semi-toroidal core comprising foil wire interleaved without notches. ### Claim 18 (depends on 17) The inductor of claim 17, wherein the inductor comprises a coupled inductor.