# US 2014/0191568 A1 · System and method for powering or charging multiple receivers wirelessly with a power transmitter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0191568 A1 - Document ID: US20140191568A1 - Status: Published application - Kind: A1 - Application number: 13/830,161 - Filed: 2013-03-14 - Published: 2014-07-10 - Earliest claimed: 2013-01-04 - Assignees: Mojo Mobility, Inc. - Inventors: Afshin Partovi - Web page: https://patentgrep.com/patent/US20140191568A1 ## CPC - H01F 38/14: Inductive couplings - H02J 7/02: for charging batteries from AC mains by converters - H02J 7/933: {the cycle being controlled or terminated in response to electric parameters} - H02J 50/12: of the resonant type - H02J 50/40: using two or more transmitting or receiving devices (H02J50/50 takes precedence) - H02J 50/60: responsive to the presence of foreign objects, e.g. detection of living beings - H02J 50/70: involving the reduction of electric, magnetic or electromagnetic leakage fields - H02J 50/80: involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices - H02J 50/90: involving detection or optimisation of position, e.g. alignment - H02M 3/01: {Resonant DC/DC converters} - H02M 3/33515: {with digital control} - H02M 3/33571: {Half-bridge at primary side of an isolation transformer} - H02M 3/33576: {having at least one active switching element at the secondary side of an isolation transformer} - H02M 1/0058: {by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero (using an auxiliary actively switched resonant commutation circuit connected to an intermediate DC voltage or between two push-pull branches of an inverter bridge H02M7/4811; in resonant inverters H02M7/4815; in inverters operating from a resonant DC source H02M7/4826)} - H02M 1/0064: {Magnetic structures combining different functions, e.g. storage, filtering or transformation} - H02M 1/007: {Plural converter units in cascade (push-pull DC/DC converters with pre-regulator H02M3/3374; DC-AC converters following a DC-DC stage including a high frequency transformer H02M7/4807; DC-AC converters following a DC-DC conversion stage generating periodically varying voltages H02M7/4826)} - Y02T 90/12: Electric charging stations - 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 - 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) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A system and method for powering or charging multiple receivers wirelessly with a power transmitter. In accordance with an embodiment, to enable ease of use, it is desirable that the receiver can be placed on a larger surface area charger without the need for specific alignment of the position of the receiver; that the system can be used to charge or power multiple devices of similar or different power and voltage requirements or operating with different wireless charging protocols on or near the same surface; and that a degree of freedom is provided with respect to vertical distance (away from the surface of the charger) between the charger and the receivers. Such features enable improved functionality with devices, vehicles, or other products, including, for example, charging of electric vehicles (EV), and trains. ## Claims ### Claim 1 A system for powering or charging multiple receivers wirelessly with a power transmitter comprising: a base unit having one or more transmitter coils; and one or more components within the base unit and/or a mobile device to be charged by the base unit, including a degree of positioning freedom, and support for different voltages, wireless power protocols, and/or power levels, for powering or charging multiple receivers wirelessly. ### Claim 2 (depends on 1) The system of claim 1, wherein the components for use in powering the multiple receivers from the same charger include a coil and/or magnetic material and/or structure system that allows position free multi-charging, including one or more magnetic resonance or loosely coupled systems, flux guide structures, Magnetic Coupling, Magnetic Aperture coil and/or other coil and/or magnetic material and structures. ### Claim 3 (depends on 1) The system of claim 1, wherein the components for use in powering the multiple receivers from the same charger include a receiver having an output regulator stage with a large acceptable operating input voltage range. ### Claim 4 (depends on 1) The system of claim 1, wherein the components for use in powering the multiple receivers from the same charger operate a communication method that allows multiple receivers to communicate with a single charger and avoid message collision. ### Claim 5 (depends on 4) The system of claim 4, wherein, to avoid message collisions, each receiver is configured to send messages at time intervals which are random or different from other receivers, such that if a collision occurs with a particular message, the charger can ignore that particular message, or reset the communication. ### Claim 6 (depends on 1) The system of claim 1, wherein the system uses a control algorithm for power transfer to the multiple receivers, which attempts to keep all of the receivers operating simultaneously such that the range of each particular receiver's voltage at its output stage regulator input is within the acceptable operating range for that particular receiver. ### Claim 7 (depends on 1) The system of claim 1, wherein the system includes components for use in powering the multiple receivers from the same charger, including support for one or more of the following features: standby and initial set up/ping or identification of receivers; changes to number of receivers due to introduction or removal of a receiver during operation; handling of changes to power requirement of one or more receivers due to movement of the receiver in an X, Y, or Z direction or change in their load; end of charge at one or more receivers; foreign object or metal detection; and/or over temperature and/or other fault handling in the system. ### Claim 8 (depends on 1) The system of claim 1, wherein the system includes a combination of physical power layer (PPL), physical communication and control layer (PCCL), command and control layer (CCL), and user application layer (UAL) components, for use in powering or charging the multiple receivers wirelessly. ### Claim 9 (depends on 8) The system of claim 8, wherein the PPL comprises the mobile device, coil, magnetic and other hardware components, systems and specifications in the base unit transmitter, or chargers and receivers that allow power to be transmitted from one or more transmitters to one or more receivers. ### Claim 10 (depends on 8) The system of claim 8, wherein the PCCL comprises components, hardware, systems and specifications that allow device identification, communication and control of the WPT, and components used to detect and interrupt power flow, such as interlock switches, temperature or magnetic field detectors, and charging flags. ### Claim 11 (depends on 8) The system of claim 8, wherein the CCL comprises a firmware and/or software and associated protocols and specifications in transmitters and/or chargers and receivers that control the charger and receiver operations and allow detection and/or identification of the receivers, control of power transmission, power regulation, end of charge actions and/or handling of any extraordinary or fault conditions. ### Claim 12 (depends on 8) The system of claim 8, wherein the UAL comprises physical, software and hardware connections, communications, control, protocols and specifications for connectivity and display or execution of additional functionality between transmitters or chargers and/or receivers and devices, systems, environments or vehicles where they are integrated or attached to. ### Claim 13 (depends on 1) The system of claim 1, wherein the base unit uses a saturable magnetic layer placed above the charger coil area to shield the charger magnetic layer from the surrounding area for use with a Magnetic Aperture (MA) or Magnetic Coupling (MC) receiver. ### Claim 14 (depends on 1) The system of claim 1, wherein the base unit uses a magnetic layer that extends beyond the physical dimensions of the base unit coil or coils on the side opposing the receiver or receivers and provides a flux return path to allow better guiding of the electromagnetic power flux and some degree of positioning freedom and efficient power transfer to one or more receivers. ### Claim 15 (depends on 1) The system of claim 1, wherein the receiver or receivers use magnetic layer(s) that extends beyond the physical dimensions of the receiver coil or coils on the side opposing the base unit and provide a flux return path to allow some degree of positioning freedom and efficient power transfer from the base unit to one or more receivers. ### Claim 16 (depends on 1) The system of claim 1, wherein the base unit is provided within an automobile, train, bus or other vehicle, for use in charging or powering one or more mobile devices each having receivers, within the vehicle. ### Claim 17 (depends on 1) The system of claim 1, wherein the receiver is incorporated within or otherwise coupled to an electric train, bus, automobile or other vehicle, and the base unit is used to charge the electric train, bus, automobile or other vehicle. ### Claim 18 A method for powering or charging multiple receivers wirelessly with a power transmitter comprising: providing a system including a base unit having one or more transmitter coils; and providing one or more components within the base unit and/or a mobile device to be charged by the base unit, including a degree of positioning freedom, and support for different voltages, wireless power protocols, and/or power levels, for powering or charging multiple receivers wirelessly. ### Claim 19 (depends on 18) The method of claim 18, wherein the components for use in powering the multiple receivers from the same charger include a coil and appropriate magnetic material and structure system that allows position free multi-charging, including one or more magnetic resonance or loosely coupled systems, flux guide structures, Magnetic Coupling, Magnetic Aperture coil and/or other magnetic material and structures. ### Claim 20 (depends on 18) The method of claim 18, wherein the components for use in powering the multiple receivers from the same charger includes a receiver having an output regulator stage with a large acceptable operating input voltage range. ### Claim 21 (depends on 18) The method of claim 18, wherein the components for use in powering the multiple receivers from the same charger operate a communication method that allows multiple receivers to communicate with a single charger and avoid message collision. ### Claim 22 (depends on 21) The method of claim 21, wherein, to avoid message collisions, each receiver is configured to send messages at time intervals which are random or different from other receivers, such that if a collision occurs with a particular message, the charger can ignore that particular message, or reset the communication. ### Claim 23 (depends on 18) The method of claim 18, wherein the system uses a control algorithm for power transfer to the multiple receivers, which attempts to keep all of the receivers operating simultaneously such that the range of each particular receiver's voltage at its output stage regulator input is within the acceptable operating range for that particular receiver. ### Claim 24 (depends on 18) The method of claim 18, wherein the system includes components for use in powering the multiple receivers from the same charger, including support for one or more of the following features: standby and initial set up/ping or identification of receivers; changes to number of receivers due to introduction or removal of a receiver during operation; handling of changes to power requirement of one or more receivers due to movement of the receiver in an X, Y, or Z direction or change in their load; end of charge at one or more receivers; foreign object or metal detection; and/or over temperature and/or other fault handling in the system. ### Claim 25 (depends on 18) The method of claim 18, wherein the system includes a combination of physical power layer (PPL), physical communication and control layer (PCCL), command and control layer (CCL), and user application layer (UAL) components, for use in powering or charging the multiple receivers wirelessly. ### Claim 26 (depends on 25) The method of claim 25, wherein the PPL comprises the mobile device, coil, magnetic and other hardware components, systems and specifications in the base unit transmitter, or chargers and receivers that allow power to be transmitted from one or more transmitters to one or more receivers. ### Claim 27 (depends on 25) The method of claim 25, wherein the PCCL comprises components, hardware, systems and specifications that allow device identification, communication and control of the WPT, and components used to detect and interrupt power flow, such as interlock switches, temperature or magnetic field detectors, and charging flags. ### Claim 28 (depends on 25) The method of claim 25, wherein the CCL comprises a firmware and/or software and associated protocols and specifications in transmitters and/or chargers and receivers that control the charger and receiver operations and allow detection and/or identification of the receivers, control of power transmission, power regulation, end of charge actions and/or handling of any extraordinary or fault conditions. ### Claim 29 (depends on 25) The method of claim 25, wherein the UAL comprises physical, software and hardware connections, communications, control, protocols and specifications for connectivity and display or execution of additional functionality between transmitters or chargers and/or receivers and devices, systems, environments or vehicles where they are integrated or attached to. ### Claim 30 (depends on 25) The method of claim 25, wherein the base unit uses a saturable magnetic layer placed above the charger coil area to shield the charger magnetic layer from the surrounding area for use with a Magnetic Aperture (MA) or Magnetic Coupling (MC) receiver. ### Claim 31 (depends on 18) The method of claim 18, wherein the base unit uses a magnetic layer that extends beyond the physical dimensions of the base unit coil or coils on the side opposing the receiver or receivers and provides a flux return path to allow better guiding of the electromagnetic power flux and some degree of positioning freedom and efficient power transfer to one or more receivers. ### Claim 32 (depends on 18) The method of claim 18, wherein the receiver or receivers use magnetic layer(s) that extends beyond the physical dimensions of the receiver coil or coils on the side opposing the base unit and provide a flux return path to allow some degree of positioning freedom and efficient power transfer from the base unit to one or more receivers. ### Claim 33 (depends on 18) The method of claim 18, wherein the base unit is provided within an automobile, train, bus or other vehicle, for use in charging or powering one or more mobile devices each having receivers, within the vehicle. ### Claim 34 (depends on 18) The method of claim 18, wherein the receiver is incorporated within or otherwise coupled to an electric train, bus, automobile or other vehicle, and the base unit is used to charge the electric train, bus, automobile or other vehicle.