# US 2015/0091520 A1 · Electrically powered vehicle and method of charging an electrical energy storage device of an electrically powered vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2015/0091520 A1 - Document ID: US20150091520A1 - Status: Published application - Kind: A1 - Application number: 14/499,477 - Filed: 2014-09-29 - Published: 2015-04-02 - Earliest claimed: 2013-09-27 - Assignees: Siemens Aktiengesellschaft - Applicants: Siemens Aktiengesellschaft - Inventors: MANUEL BLUM; THOMAS KOMMA; MIRJAM MANTEL; MONIKA POEBL - Web page: https://patentgrep.com/patent/US20150091520A1 ## CPC - B60L 50/52: characterised by DC-motors - B60L 53/12: Inductive energy transfer - B60L 53/122: Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil - B60L 53/36: by positioning the vehicle - B60L 53/51: Photovoltaic means - B60L 53/53: Batteries - B60L 53/54: Fuel cells - B60L 2210/30: AC to DC converters - 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 10/72: Electric energy management in electromobility - Y02T 90/12: Electric charging stations - Y02T 90/14: Plug-in electric vehicles - 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 An electrically powered vehicle has a drive apparatus which includes an electric machine and an electrical energy storage device connected to the electric machine. A charging device is connected to the electrical energy storage device for the wireless transfer of energy by way of an alternating magnetic field. For that purpose, the charging device has an electronic coil which interacts with the alternating magnetic field. The electronic coil is connected to an adjustable compensating circuit. ## Claims ### Claim 1 An electrically powered vehicle (30), comprising: a drive apparatus having an electric machine and an electrical energy storage device connected to said electric machine; a charging device connected to said electrical energy storage device for a wireless transfer of energy by way of an alternating magnetic field, said charging device having an electronic coil configured to interact with the alternating magnetic field; and a settable compensating circuit connected to said electronic coil. ### Claim 2 (depends on 1) The vehicle according to claim 1, wherein said compensating circuit comprises an adjustable capacitor connected in series or in parallel with said electronic coil. ### Claim 3 (depends on 1) The vehicle according to claim 1, wherein said compensating circuit comprises an adjustable first capacitor connected to form with said electronic coil a series circuit, and an adjustable second capacitor connected in parallel with said series circuit formed of said electronic coil and said first capacitor. ### Claim 4 (depends on 1) The vehicle according to claim 1, which comprises a control device for setting said compensating circuit in dependence on one or both of a power level transferred by way of the alternating magnetic field and an efficiency level of the energy transfer. ### Claim 5 A method of operating a charging device of an electrically powered vehicle, the vehicle having a drive apparatus with an electric machine and an electrical energy storage device connected to the electric machine, the method comprising: receiving with the charging device energy from an alternating magnetic field by way of an electronic coil disposed to interact with the alternating magnetic field and to feed the energy to the electrical energy storage device in the form of electrical energy; setting the charging device with a settable compensating circuit connected to the electronic coil by the following steps: setting a power transferred to the charging device by the alternating magnetic field by adjusting a first adjustable capacitor of the compensating circuit connected in series with the electronic coil; and setting an efficiency level in relation to a power transferred by adjusting a second adjustable capacitor of the compensating circuit connected in parallel with a series connection formed of the electronic coil and the first capacitor. ### Claim 6 (depends on 5) The method according to claim 5, which comprises alternately repeating the step of setting the power and the step of setting the efficiency level. ### Claim 7 (depends on 6) The method according to claim 6, which comprises continuing repeating the setting steps until a maximum value for the efficiency level is reached or a pre-determined comparison value for the transferred power is reached. ### Claim 8 (depends on 5) A computer program product, comprising a non-transitory program for a computer unit of a charging device, wherein the program comprises non-transitory program code segments of a program for carrying out the method according to claim 5 when the program is carried out by the computer unit. ### Claim 9 (depends on 8) The computer program product according to claim 8, wherein the computer program product comprises a computer-readable medium on which the program code segments are stored in non-transitory form. ### Claim 10 (depends on 8) The computer program product according to claim 8, wherein the program is loadable directly into an internal memory of the computer unit.