1090 results about "Wireless power transfer" patented technology

Methods, systems, and devices for wireless communications are described. For instance, a first wireless device may transmit, to a second wireless device, a first signal for probing an energy state of the second wireless device. The first wireless device may monitor for a second, backscattered signal indicating the energy state of the second wireless device and may transmit, to the second wireless device, an indication of resources for harvesting energy based on monitoring for the second, backscattered signal. The first wireless device may transmit, to the second wireless device and over the resources, a third signal distinct from the first signal and associated with harvesting energy.

The invention discloses a wireless power transmission coil optimization method and a related system, which can realize automation of coil structure parameters and multi-target global optimization by acquiring a coil geometric parameter space, constructing a comprehensive optimization function and performing iterative search in the coil geometric parameter space. The problems that in traditional design, the number of simulation iterations is large, design efficiency is low, local optimum is prone to occurring, and multiple performance indexes are difficult to balance are effectively solved, coil design efficiency and precision are remarkably improved, and dependence on artificial experience is reduced. Therefore, the number of manual intervention and simulation is remarkably reduced, the coil design efficiency is improved, and the prototype development period of the WPT system is shortened. Besides, iterative search is carried out in the parameter space, so that the whole design space can be effectively explored, a locally optimal solution trap can be jumped out, and a globally optimal or approximately globally optimal coil structure parameter combination can be obtained more possibly.

The invention provides a method for extracting equivalent parameters of a cavity resonant wireless power transmission system. The method comprises the following steps: S1, acquiring system input impedance spectrum data; s2, taking the input impedance spectrum data of the system as input, and utilizing a trained LSTM regression model to obtain a preliminary predicted value of an equivalent parameter of the system; s3, based on the preliminary prediction value of the equivalent parameters of the system, performing regression fitting by adopting a nonlinear fitting algorithm to obtain an accurate value of the equivalent parameters of the system; the system equivalent parameters comprise cavity internal resistance and cavity equivalent inductance of the resonant cavity and a mutual inductance value between the coil and the resonant cavity. The method has the advantages that equivalent parameters of the cavity resonant wireless power transmission system in all current mainstream modes can be effectively extracted; the NLS algorithm is prevented from convergence failure or falling into local optimum due to the fact that an initial value seriously deviates from a real value, and the fitting precision and stability are extremely high.

A device for transmission of wireless power according to an embodiment of the present specification comprises: a power conversion circuit for transmitting the wireless power to a wireless power receiving device; and a communication / control circuit for communicating with the wireless power receiving device and controlling the wireless power, wherein the communication / control circuit transmits a response to a reception data packet received from the wireless power receiving device or a transmission data packet transmitted to the wireless power receiving device on the basis of a timeout period, and the timeout period is changed according to a communication speed between the communication / control circuit and the wireless power receiving device.

The invention discloses a laser wireless energy transfer dynamic MPPT control method based on an RL-PSO hybrid algorithm and a reconfigurable array system, and aims to solve the problems of power oscillation and mismatch loss caused by light spot offset of a photovoltaic array under laser dynamic irradiation. According to the method, reinforcement learning (RL) and particle swarm optimization (PSO) are fused, dynamic parameters such as the light spot moving speed and irradiance are sensed in real time through the RL, the inertia weight and learning factors of the PSO are adjusted in a self-adaptive mode, and collaborative optimization of global search and local tracking is achieved. According to the system level, a reconfigurable photovoltaic array is designed, and according to data of a light spot position sensor, battery series-parallel topology is dynamically adjusted through a switch matrix, and current matching is optimized. According to the method, double-loop control is adopted, wherein an outer-layer RL decision module dynamically switches PSO working modes according to the environment, and an inner-layer PSO module optimizes the working voltage. The system efficiency in a dynamic scene can be improved by 15%-30%, mismatch loss is reduced by 40% or above, and the method is suitable for unsteady-state energy supply scenes such as unmanned aerial vehicles and mobile robots.

A coil assembly for wireless electrical power transmission includes a plurality of external connecting terminals, a power feeding coil, a resonant capacitor electrically connecting with the power feeding coil, and busbars each of which electrically connects between the external connecting terminals.

A method for estimating friendly metal losses associated with wireless power transfer from a wireless power transmitter to a wireless power receiver can include obtaining an indication of received power including rectifier voltage and rectifier current of the wireless power receiver and computing a friendly metal power loss based on the indication of rectifier voltage and rectifier current of the wireless power receiver and one or more coefficients corresponding to a baseline wireless power transmission between the wireless power transmitter and the wireless power receiver. The rectifier voltage can be a rectifier output voltage, and the rectifier current can be a rectifier output current. Computing the friendly metal power loss can use an equation having a formPl⁢o⁢s⁢s=a·IT⁢X2+b·Irect2+c·Vrect2,where b is a coefficient relating to the rectifier current, c is a coefficient relating to the rectifier voltage, a is a coefficient relating to transmitter current ITX.

A bearing assembly includes an annular carrier, an outer ring disposed within the carrier, the outer ring having an outer raceway and a transmitter coil spaced axially from the outer raceway. The transmitter coil is electrically connectable with a battery and is configured to generate an electromagnetic field when current flows through the transmitter coil. An inner ring is disposable about a rotor shaft and has an inner raceway and a receiver coil spaced axially from the inner raceway so as to be located proximal to and inductively coupled with the transmitter coil such that electric current is generated within the receiver coil when current flows through the transmitter coil. The receiver coil is connected to electromagnetic coils of a motor rotor such that electric current flows from receiver coil to the coils. A plurality of rolling elements are disposed between rotatably couple the outer ring with the inner ring.

A method for operating a wireless transmission system includes (i) receiving, as input, direct current (DC) power from a power and data connector that comprises a power input and a bi-directional data connector, (ii) generating a driving signal for driving an antenna of the wireless power transmission system, (iii) generating alternating current (AC) wireless signals based on the input DC power and the driving signal, (iv) propagate AC wireless power signals that are based on the AC wireless signals via the antenna, (v) couple with a wireless receiver system via the AC wireless power signals, (vi) receiving data associated with a peripheral device by decoding in-band data signals from the AC wireless power signals that are encoded by the wireless receiver system, and (vii) providing the data associated with the peripheral device to a client device operatively associated with the wireless transmission system, via the bi-directional data connector.

A wireless power transfer system includes a power transmission device and a power reception device that is wirelessly supplied with power from the power transmission device. The power reception device includes a secondary side resonance circuit, a magnetic flux generation circuit, and a secondary side detection circuit. The power transmission device transitions from a standby state to a power transmission state in which a power transmission current is supplied to a primary side coil when a primary side detection circuit detects an increase in magnetic flux, generated by the magnetic flux generation circuit, linking the primary side coil. The magnetic flux generation circuit adjusts the generated magnetic flux based on a detected value of the secondary side detection circuit.

A bearing assembly includes an outer ring connectable with a housing, the outer ring having an outer ring raceway and a transmitting coil axially spaced from the outer ring raceway. The transmitting coil can be electrically connected to a battery and is configured to generate an electromagnetic field when a current flows therethrough. The inner ring can be arranged around a rotating shaft of the rotor and is provided with an inner ring raceway and a receiving coil which is spaced from the inner ring raceway in the axial direction. And the receiving coil is close to the transmitting coil and is in induction connection with the transmitting coil, so that current is generated in the receiving coil when the current flows through the transmitting coil. The receiving coil is connected with an electromagnetic coil of the motor rotor, so that current flows to the electromagnetic coil from the receiving coil. A plurality of rolling bodies are disposed between the outer ring raceway and the inner ring raceway to rotatably connect the outer ring and the inner ring together.

The present disclosure relates to a method for transmitting a response message in a wireless power transmission system, the method being performed by a data stream responder, wherein the data stream responder enters a power transfer phase related to transferring or receiving wireless power, and transmits a response message to a data stream initiator in the power transfer phase. The response message is transmitted within a first time out period. A value of the first time out period is configured on the basis of an ADT packet of 1 byte, a time interval related to a DSR packet, and a communication error.

A wireless charger device can support multiple different receiver devices having different wireless charging specifications. The wireless charger device can house two wireless power transmitter coils having different dimensions and arranged coaxially with each other. A first coil can have a size and shape compatible with a portable device such as a smart phone while the second coil can have a size and shape compatible with a smaller device such as a smart watch. The first coil and the second coil can deliver power through the same charging surface, or the first coil can deliver power through a first charging surface while the second coil can deliver power through a second charging surface opposite the first charging surface.

A power transmitter for wireless power transfer includes a control and communications unit, a vehicular power input regulator, an inverter circuit, at least one coil, a shielding, a housing, and a removable front plate. The housing is configured to house, at least in part, one or more of the control and communications unit, the invertor circuit, the at least one coil, the shielding, or combinations thereof. The removable front plate is configured to mechanically connect to the housing, the removable front plate including at least one magnet, the at least one magnet configured to attract a receiver magnet when a power receiver is proximate to the removable front plate.

A power transmitter (101) provides power to a power receiver (105) via an inductive power transfer signal which is also used by the power receiver (105) for communication by load modulation. The power receiver (105) comprises a transmitter (509) arranged to transmit symbols in accordance with a first or second communication mode where the first mode modulates data symbols by a chip sequence from a set of sequences and the second communication mode does not. The power receiver (105) may transmit data symbols requesting a power transfer signal variation using a chip sequence from the set. A detector (515) may detect if the variation occurs, and if so a selector (513) selects the first communication mode and otherwise it selects the second communication mode. The approach may allow selection of an appropriate communication mode without requiring data to be transmitted from the power transmitter. The approach may provide improved backwards compatibility.

Presented herein are systems and methods of modifying vehicle operations to charge electrical components. A computing system having one or more processors coupled with at least one memory is configured to detect a charge pad along a route of a vehicle. The vehicle may have a charge panel configured to accept electrical power from the charge pad to provide to one or more electrical components in the vehicle. The computing system is configured to modify, in accordance with at least one of the plurality of characteristics of the charge pad and the plurality of operational parameters of the vehicle, at least one operation of the vehicle to receive the electrical power from the charge pad.

A kitchen appliance is disclosed includes a first electrical component, a second electrical component, and a wireless power receiver system. The wireless power receiver system includes a first receiver antenna configured to couple with a first transmission antenna and receive virtual AC power signals from the first transmission antenna. A second receiver antenna is configured to couple with a second transmission antenna and receive virtual DC power signals from the second transmitter antenna. A first receiver power conditioning system is configured to receive the virtual AC power signals, convert the virtual AC power signals to AC received power signals, and provide the AC received power signals to power the first electrical component. The second receiver power conditioning system configured to receive the virtual DC power signals, convert the virtual DC power signals to DC received power signals, and provide the DC received power signals to power the second electrical component.

A stationary induction charging device configured to inductively interact with a mobile induction charging device of a motor vehicle during a charging operation for wireless power transmission includes a positioning device configured to generate a positioning signal for positioning the mobile induction charging device to the stationary induction charging device. The stationary induction charging device further includes an activation interface configured to at least partially activate or deactivate the positioning device upon receiving a corresponding signal from a triggering device.

A wireless power transfer and docking station and methods are provided for wirelessly charging or powering a portable device and automatically connecting to external peripheral devices. The station comprises at least one wireless-power transmitter for transmitting power and identification-related information, and at least one wireless-power receiver, connected to the portable device, for exchanging the power and the identification-related information to the portable device. The methods comprise pairing the at least one wireless-power transmitter with the at least one wireless-power receiver when the portable device is placed in a charging zone of the at least one wireless-power transmitter, exchanging the identification-related information for automatically and wirelessly connecting to the external peripheral devices, and attempting connecting to the external peripheral devices.

An enrollment assistance device comprising a carrier with a first surface portion for a user device, and a second surface portion for a contactless smartcard; a first wireless power transfer arrangement supported by the carrier and arranged in the first surface portion of the carrier; a second wireless power transfer arrangement supported by the carrier and arranged in the second surface portion of the carrier; and a conductor arrangement supported by the carrier and conductively connecting the first wireless power transfer arrangement and the second wireless power transfer arrangement.

A method of operating a wireless transmission system includes (i) initiating a discovery mode for the wireless transmission system, (ii) determining if at least one other system is couplable with the wireless transmission system during the discovery mode, (iii) if at least one other system is couplable with the wireless transmission system during the discovery mode, operating in a power transfer mode, (iv) during the power transfer mode, determining if a load associated with the at least one other system is in an end-of-charge state, and (v) if the load associated with the at least one other system is in the end-of-charge state, operating in an end-of-charge mode.

A wireless power transmission system includes an input stabilization system, a controller, an amplifier, and an antenna. The input power stabilization system includes a proportional integral (PI) controller and is configured to receive an input power from an external power source and generate a stabilized direct current (DC) power based on a desired input power. The controller is configured to generate a driving signal for alternating current (AC) wireless signals, the AC wireless signals including wireless power signals. The amplifier is configured to (i) receive the stabilized DC power and antenna driving signals, (ii) invert the stabilized DC power based on the driving signals to generate alternating current (AC) wireless signals. The antenna is configured to transmit the AC wireless signals when driven by the amplifier.

The present disclosure provides a method for receiving wireless power by a wireless power receiver in a wireless power transmission system and a device using same, the method comprising: in a negotiation phase, transmitting request information to a wireless power transmitter and establishing a power transfer contract with the wireless power transmitter on the basis of the request information; and in a power transfer phase, receiving the wireless power from the wireless power transmitter on the basis of the power transfer contract, wherein the request information comprises information related to the number of cycles of FSK, the wireless power receiver receives data information from the wireless power transmitter through the FSK based on the information related to the number of cycles, and the wireless power receiver decodes the FSK in an interval changing according to the number of cycles.

A wireless power system has electronic devices that mate with each other to transfer wireless power. Each device may have a wireless power coil. Alignment magnets may be used to magnetically attach devices to each other so that the coils in the devices are aligned with respect to each other for wireless power transfer. The system may include first, second, and third devices. The first and third devices may have fixed alignment magnets with poles of opposite magnetic polarity that allow the first and third devices to be attached to each other so that their coils are aligned. The second device may have a reconfigurable alignment magnet that is operable in a first mode in which the second device is magnetically attached to the first device and a second mode in which the second device is magnetically attached to the third device.

A waveguide to transmission line coupler is provided. The waveguide can be capable of guiding electromagnetic energy and can have a plurality of coupling sets along the waveguide. The coupling set can include a non-resonant coupling aperture capable of coupling said electromagnetic energy from the waveguide to at least one output transmission line and a tuning element in the waveguide proximate to said non-resonant coupling aperture thereto, capable of tuning out residual shunt susceptance corresponding to the electromagnetic energy coupled by said non-resonant coupling aperture.

Systems and methods are provided for managing temperature inside a wireless power transfer (WPT) system for an electric vehicle. A thermal management system of a WPT system uses one or more of a passive cooling method, a semi-active cooling method, and an active cooling method to manage an internal temperature of the WPT system during a charging session. Improvements in thermal management allow for longer duration of charging sessions and higher power charging sessions without the need to suspend charging for cooling. In addition, several different methods of camouflaging and implementing a thermal management system in a public space are also provided.

This disclosure provides an X-ray imaging device and its power distribution unit and wireless power transmission device. The power distribution unit includes: a first rectifier circuit, a charging circuit, an energy storage module, and a first inverter circuit; the input terminals of both the first rectifier circuit and the charging circuit are connected to the external power grid; the output terminal of the first rectifier circuit is connected to the input terminal of the first inverter circuit, and the output terminal of the first inverter circuit is connected to the wireless power transmission device of the X-ray imaging device; the output terminal of the charging circuit is connected to one end of the energy storage module, and the other end of the energy storage module is connected to the input terminal of the first inverter circuit. In this disclosure, the power supply from the power grid and the power supply from the energy storage module are in parallel, which can reduce the imaging device's demand on the power grid capacity. Since the charging circuit only participates in the charging process of the energy storage module and does not participate in the discharging process of the energy storage module, it can realize simultaneous charging and discharging of the energy storage module, and there are no excessive requirements on the power level of the charging circuit, which can reduce the cost of the charging circuit.

Detecting an alignment accessory in a wireless power transfer (WPT) system and initiating a more robust WPT profile in response thereto can include detecting presence or absence of the alignment accessory using one or more sensors; and, responsive to the presence of the alignment accessory, enabling more robust WPT profile flag; or, responsive to the absence of the alignment accessory disabling the more robust WPT profile flag. Detecting alignment between a wireless power transmitter (PTx) and a wireless power receiver (PRx) and initiating more robust WPT profile in response thereto can include detecting alignment of the PTx and PRx; and responsive to the alignment being within a predetermined level, enabling more the robust WPT profile; or responsive to the alignment being greater than the predetermined level, disabling more robust WPT profile. The more robust WPT profile can be a magnetic power profile (MPP) from a Wireless Power Consortium Qi standard.

A device can include a wireless power transfer coil configured to be magnetically coupled to a wireless power transfer coil of a complementary device, wireless power transfer circuitry, a processing and communications system, and a wireless communications coil coupled to the processing and communications system, the communications coil comprising one or more windings configured to be magnetically coupled to a vertical communications coil of the complementary device to allow communications between the processing and communications system and the complementary device, wherein the one or more windings of the communications coil are disposed in at least one plane parallel to the plane of the vertical communications coil.

Methods and systems for dynamic wireless power transfer to charge an electric vehicle (EV) in motion are provided. The method can include: transmitting wireless power from a plurality of main transmitter coils; transmitting wireless power from a assisted coil disposed between each pair of adjacent main transmitter coils; receiving the wireless power at a receiver coil when the electric vehicle is charged in motion; providing a primary compensation network coupled to the main transmitter coils and the assisted coils; and compensating for reactive power at a secondary side by a secondary compensation network coupled to the receiver coil. Dimensions and positions of the assisted coils and parameters of the compensation network are configured to maintain a substantially constant mutual inductance profile between the transmitter coils and the receiver coil when the electric vehicle is charged in motion, thereby reducing power pulsation and providing a stable output voltage to the battery of the EV.