# US 8,569,994 B2 · Charging device, system, and method of supplying power to at least one load > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,569,994 B2 - Document ID: US8569994B2 - Status: Granted - Kind: B2 - Application number: 13/048,708 - Filed: 2011-03-15 - Published: 2012-03-01 - Granted: 2013-10-29 - Earliest claimed: 2011-03-15 - Assignees: General Electric Company - Applicants: John James Dougherty - Inventors: John James Dougherty - Web page: https://patentgrep.com/patent/US8569994B2 ## CPC - H02J 7/865: {Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence)} - B60L 53/14: Conductive energy transfer - B60L 53/66: Data transfer between charging stations and vehicles - B60L 58/40: for controlling a combination of batteries and fuel cells - H02J 3/18: Arrangements for adjusting, eliminating or compensating reactive power in networks - H02J 7/04: Regulation of charging current or voltage - H02J 7/947: {in response to integrated charge or discharge current} - 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 90/12: Electric charging stations - Y02T 90/14: Plug-in electric vehicles - Y02T 90/16: Information or communication technologies improving the operation of electric vehicles - Y02T 90/40: Application of hydrogen technology to transportation, e.g. using fuel cells - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A charging device includes a power conditioning device configured to be coupled to an electric power source by an electrical distribution bus. The power conditioning device is further configured to receive alternating current (AC) volt-amperes from the electric power source, convert a first amount of the AC volt-amperes received into direct current (DC) power, and supply the DC power to at least one load. The charging device also includes a controller coupled to the power conditioning device. The controller is configured to determine a second amount of volt-amperes that the charging device has a capacity to supply in addition to the DC power supplied, and control the power conditioning device to supply volt-amperes reactive to the electrical distribution bus using at least a portion of the second amount of volt-amperes. ## Claims ### Claim 1 A charging device comprising: a power conditioning device configured to be coupled to a three phase electric power source by an electrical distribution bus, said power conditioning device further configured to receive alternating current (AC) volt-amperes from the three phase electric power source, said power conditioning device having a volt-amperes capacity; and a controller coupled to said power conditioning device, said controller configured to: determine, using a d-q-n transformation, a first amount of the volt-amperes capacity to be converted to direct current (DC) power by said power conditioning device; control said power conditioning device to convert the first amount of the volt-amperes capacity to DC power and to supply the DC power to at least one load when the first amount is greater than zero; determine, using a d-q-n transformation, a second amount of the volt-amperes capacity, wherein the second amount is a difference between the volt-amperes capacity and the first amount; and control said power conditioning device to supply volt-amperes reactive to the electrical distribution bus using at least a portion of the second amount of the volt-amperes capacity when the second amount is greater than zero. ### Claim 2 (depends on 1) A charging device in accordance with claim 1, wherein the at least one load is a power storage device of an electric vehicle, said power conditioning device is configured to supply DC power to the power storage device in an amount requested by the electric vehicle. ### Claim 3 (depends on 1) A charging device in accordance with claim 1, wherein said controller is configured to determine the second amount of the volt-amperes capacity by subtracting the amount of DC power supplied from the volt-amperes. ### Claim 4 (depends on 1) A charging device in accordance with claim 1, wherein said controller is configured to determine an amount of volt-amperes reactive required by at least one electrical device coupled to the electrical distribution bus. ### Claim 5 (depends on 4) A charging device in accordance with claim 4, wherein said controller is configured to control said power conditioning device to use at least a portion of the second amount of the volt-amperes capacity to supply volt-amperes reactive to the electrical distribution bus to compensate for the volt-amperes reactive required. ### Claim 6 (depends on 4) A charging device in accordance with claim 4, wherein said controller is configured to control said power conditioning device to supply volt-amperes reactive to the electrical distribution bus at an amount equal to the lesser of the second amount of the volt-amperes capacity and the amount of volt-amperes reactive required. ### Claim 7 (depends on 1) A charging device in accordance with claim 1, wherein said power conditioning device comprises a plurality of switching devices configured to convert AC volt-amperes to DC power and to supply volt-amperes reactive to the electrical distribution bus. ### Claim 8 A system for supplying power to at least one load, said system comprising: a power measurement device configured to measure at least one characteristic of electricity transmitted within an electrical distribution bus; a charging device coupled to said power measurement device, said charging device comprising: a power conditioning device configured to be coupled to a three phase electric power source by the electrical distribution bus, said power conditioning device further configured to receive alternating current (AC) volt-amperes from the three phase electric power source, said power conditioning device having a volt-amperes capacity; and a controller coupled to said power conditioning device, said controller configured to: determine, using a d-q-n transformation, a first amount of the volt-amperes capacity to be converted to direct current (DC) power by said power conditioning device; control said power conditioning device to convert the first amount of the volt-amperes capacity to DC power and to supply the DC power to at least one load when the first amount is greater than zero; determine, using a d-q-n transformation, a second amount of the volt-amperes capacity, wherein the second amount is a difference between the volt-amperes capacity and the first amount; and control said power conditioning device to supply volt-amperes reactive to the electrical distribution bus using at least a portion of the second amount of the volt-amperes capacity when the second amount is greater than zero. ### Claim 9 (depends on 8) A system in accordance with claim 8, wherein the at least one load is a power storage device of an electric vehicle, said power conditioning device is configured to supply DC power to the power storage device in an amount requested by the electric vehicle. ### Claim 10 (depends on 8) A system in accordance with claim 8, wherein said controller is configured to determine the second amount of the volt-amperes capacity by subtracting the amount of DC power supplied from the volt-amperes capacity. ### Claim 11 (depends on 8) A system in accordance with claim 8, wherein said power measurement device is configured to determine an amount of volt-amperes reactive required by at least one electrical device coupled to the electrical distribution bus and transmit data representative of the amount of volt-amperes reactive required to said controller. ### Claim 12 (depends on 11) A system in accordance with claim 11, wherein said controller is configured to control said power conditioning device to use at least a portion of the second amount of the volt-amperes capacity to supply volt-amperes reactive to the electrical distribution bus to compensate for the volt-amperes reactive required. ### Claim 13 (depends on 11) A system in accordance with claim 11, wherein said controller is configured to control said power conditioning device to supply volt-amperes reactive to the electrical distribution bus at an amount equal to the lesser of the second amount of the volt-amperes capacity and the amount of volt-amperes reactive required. ### Claim 14 (depends on 8) A system in accordance with claim 8, wherein said power conditioning device comprises a plurality of switching devices configured to convert AC volt-amperes to DC power and to supply volt-amperes reactive to the electrical distribution bus. ### Claim 15 A method of supplying power to at least one load, said method comprising: receiving alternating current (AC) volt-amperes from a three phase electric power source through an electrical distribution bus; determining, using a d-q-n transformation, a first amount of the AC volt-amperes to be supplied to at least one load; converting the first amount of the AC volt-amperes received into direct current (DC) power when the first amount is greater than zero; supplying the DC power to the at least one load when the first amount is greater than zero; determining, using a d-q-n transformation, a second amount of volt-amperes, wherein the second amount is a difference between a maximum volt-amperes capacity and the first amount; and supplying volt-amperes reactive to the electrical distribution bus using at least a portion of the second amount of volt-amperes when the second amount of volt-amperes is greater than zero. ### Claim 16 (depends on 15) A method in accordance with claim 15, wherein the at least one load is a power storage device of an electric vehicle, said supplying DC power to at least one load comprises supplying DC power to the power storage device in an amount requested by the electric vehicle. ### Claim 17 (depends on 15) A method in accordance with claim 15, wherein said determining the second amount of volt-amperes that is capable of being supplied comprises subtracting the amount of DC power supplied from the maximum volt-amperes capacity. ### Claim 18 (depends on 15) A method in accordance with claim 15, further comprising determining an amount of volt-amperes reactive required by at least one electrical device coupled to the electrical distribution bus. ### Claim 19 (depends on 18) A method in accordance with claim 18, wherein said supplying volt-amperes reactive to the electrical distribution bus using at least a portion of the second amount of volt-amperes comprises supplying volt-amperes reactive to the electrical distribution bus at an amount equal to the lesser of the second amount of volt-amperes and the amount of volt-amperes reactive required.