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Witricity Corporation patents


Recent patent applications related to Witricity Corporation. Witricity Corporation is listed as an Agent/Assignee. Note: Witricity Corporation may have other listings under different names/spellings. We're not affiliated with Witricity Corporation, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "W" | Witricity Corporation-related inventors


Wireless energy transfer resonator thermal management

Described herein are improved configurations for a wireless power transfer. Described are methods and designs to reduce and manage heating and heat dissipation in resonator structures. ... Witricity Corporation

Resonator arrays for wireless energy transfer

Described herein are improved configurations for an apparatus that may include a plurality of resonators electrically interconnected and arranged in an array to form a composite resonator for wireless power transfer, each one of the plurality of resonators may include a block of a magnetic material having a conductor wire wrapped around a cross section thereof to form at least one loop enclosing an area substantially equal to the cross section, wherein the plurality of resonators are may be oriented so that a dipole moment of each one of the plurality of resonators is aligned with a dipole moment of each other one of the plurality of resonators.. . ... Witricity Corporation

Vehicle charger network

A computing device can receive first information indicative of an availability of multiple chargers and can receive a request for a list of available chargers from a vehicle operator. A hierarchical list of available chargers is created based on the first information and at least one operator preference, and information indicative of an operator selection of at least one charger from the hierarchical list is received by the computing device.. ... Witricity Corporation

Impedance tuning

The disclosure features wireless power transfer systems that include a power transmitting apparatus configured to wirelessly transmit power, a power receiving apparatus connected to an electrical load and configured to receive power from the power transmitting apparatus, and a controller connected to the power transmitting apparatus and configured to receive information about a phase difference between output voltage and current waveforms in a power source of the power transmitting apparatus, and to adjust a frequency of the transmitted power based on the measured phase difference.. . ... Witricity Corporation

Wireless power transfer systems with shaped magnetic components

In a first aspect, the disclosure features apparatuses for wireless power transfer, the apparatuses including a coil formed of a conductive material. The coil includes a plurality of loops, where the plurality of loops defines an internal region of the coil that extends along a coil axis. ... Witricity Corporation

Mitigating false detection of foreign objects in wireless power systems

Methods and systems are provided for mitigating false detection of a foreign or living objects positioned near a wireless power system configured to transmit power to a load of a vehicle. Methods and systems can monitor a foreign or living object detection (fod or lod) signal of a fod or lod system, the fod or lod system coupled to the wireless power system. ... Witricity Corporation

Wireless power systems having interleaved rectifiers

A wireless power receiver is coupled to an impedance matching network, the impedance matching network having a first node and a second node. Coupled to the first node is a first branch having a first positive reactance and a second branch having a first negative reactance, wherein an absolute value of the first positive reactance is different from an absolute value of the first negative reactance, and coupled to the second node is a third branch having a second positive reactance and a fourth branch having a second negative reactance, wherein an absolute value of the second positive reactance is different from an absolute value of the second negative reactance.. ... Witricity Corporation

Relative position determination and vehicle guidance in wireless power transfer systems

The disclosure features systems and methods that include generating a set of nm voltage values using one or more magnetic field detectors, where each voltage value is related in magnitude to an amplitude of a magnetic field between a wireless power source and a wireless power receiver mounted to a vehicle, classifying the set of nm voltage values into one of two classes, where each of the two classes represents a different spatial region defining a range of positions of the wireless power receiver relative to a position of the wireless power source, and transmitting a signal including output information to a processor or display interface, the output information featuring information about the one class into which the set of voltage values was classified.. . ... Witricity Corporation

Tunable wireless power architectures

Described herein are improved configurations for a wireless power transfer. The parameters of components of the wireless energy transfer system are adjusted to control the power delivered to the load at the device. ... Witricity Corporation

Inductor system having shared material for flux cancellation

Methods and apparatus for flux cancellation includes first and second inductors, wherein the first inductor is configured for coupling to a first energy source and the second inductor is configured for coupling to a second energy source. A layer of magnetic material is disposed between the first and second inductors, wherein the first and second inductors are configured such that, when driven with an oscillating current, magnetic flux generated by the first inductor is substantially canceled by magnetic flux generated by the second inductor in the layer of magnetic material.. ... Witricity Corporation

Diode conduction sensor

Methods and apparatus for a body diode conduction sensor configured for coupling to a switching element. In embodiments, the sensor comprises first and second voltage divider networks coupled to a voltage source and a diode coupled to the switching element and to the first voltage divider network, wherein the diode is conductive at times corresponding to body diode conduction of the switching element decreasing the dc average voltage at the output node of the first voltage divider network. ... Witricity Corporation

Controllers for wireless power systems having safety functionality

Methods and apparatus controlling a wireless power transmitter by applying a first low-side driver signal to a first channel in a first pair of channels and applying a first high-side driver signal to a second channel in first pair of channels, wherein each driver signal has a state that is “active” or “inactive” and drives a transistor gate of a switching element. The state of each driver signal on each channel can be monitored to detect an error condition to prevent damaging current flow condition to the switching elements. ... Witricity Corporation

Signaling in wireless power systems

A wireless power system for powering a television includes a source resonator, configured to generate an oscillating magnetic field, and at least one television component attached to at least one device resonator, wherein the at least one device resonator is configured to wirelessly receive power from the source resonator via the oscillating magnetic field when the distance between the source resonator and the at least one device resonator is more than 5 cm, and wherein at least one television component draws at least 10 watts of power.. . ... Witricity Corporation

Voltage regulation in wireless power receivers

A wireless power receiver includes one or more tunable capacitors in parallel with an inductor. The wireless power receiver adapted to receive an induced voltage input at the inductor due to a magnetic field generated by a wireless power transmitter. ... Witricity Corporation

11/09/17 / #20170324351

Methods and apparatus for voltage regulation

Methods and apparatus provide compensation for impedance changes in a network energized by an amplifier, such as a class e amplifier. In embodiments, bus voltage amplifier fundamental ac output voltage can be used to generate a feedback signal for adjusting impedance of one or more components in the network. ... Witricity Corporation

10/05/17 / #20170288466

Wireless powered television

A wireless power system for powering a television includes a source resonator, configured to generate an oscillating magnetic field, and at least one television component attached to at least one device resonator, wherein the at least one device resonator is configured to wirelessly receive power from the source resonator via the oscillating magnetic field when the distance between the source resonator and the at least one device resonator is more than 5 cm, and wherein at least one television component draws at least 10 watts of power.. . ... Witricity Corporation

09/14/17 / #20170263374

Wireless energy transfer using repeater resonators

Described herein are improved configurations for a device for wireless power transfer that includes a conductor forming at least one loop of a high-q resonator, a capacitive part electrically coupled to the conductor, and a power and control circuit electrically coupled to the conductor, the power and control circuit providing two or more modes of operation and the power and control circuit selecting how the high-q resonator receives and generates an oscillating magnetic field.. . ... Witricity Corporation

09/07/17 / #20170256991

Cross-connection detection in wireless power transmission systems

Methods and apparatus to detect a cross-connect situation in a wireless power transfer system having one or more power receiving units (prus) and one or more power transmitting units (ptus). The ptu can perturb a transmit coil signal and look for expected correlation on wirelessly connected pru to determine the presence of absence of a cross-connect condition.. ... Witricity Corporation

08/10/17 / #20170229917

Pwm capacitor control

Methods, systems, and devices for controlling a variable capacitor. One aspect features a variable capacitance device that includes a capacitor, a first transistor, a second transistor, and control circuitry. ... Witricity Corporation

08/03/17 / #20170222484

Controlling wireless power transfer systems

Methods, systems, and devices for operating wireless power transfer systems. One aspect features a wireless energy transfer system that includes a transmitter, and a receiver. ... Witricity Corporation

08/03/17 / #20170217325

Controlling wireless power transfer systems

Methods, systems, and devices for operating wireless power transfer systems. One aspect features a wireless energy transfer system that includes a transmitter, and a receiver. ... Witricity Corporation

07/13/17 / #20170201129

Wireless powered television

A wireless power system for powering a television includes a source resonator, configured to generate an oscillating magnetic field, and at least one television component attached to at least one device resonator, wherein the at least one device resonator is configured to wirelessly receive power from the source resonator via the oscillating magnetic field when the distance between the source resonator and the at least one device resonator is more than 5 cm, and wherein at least one television component draws at least 10 watts of power.. . ... Witricity Corporation

06/22/17 / #20170179764

Radiative wireless power transmission

A wireless power transmission system (100) includes a conductive waveguide (110) at least partially filled with a dielectric material (115), the waveguide extending along a first direction (e.g., z-axis) from a first end (111a) to an opposing end (111b) thereof, the waveguide having a bottom face (112), a top face (114) and a pair of side faces (116a, 116b) that together form a substantially rectangular cross-section of the waveguide, the top face having a plurality of slots (118) oriented substantially orthogonal to the first direction and distributed between the first end and the opposing end, the slots separated from each other by a first distance (l1) measured along the first direction. In one illustrative embodiment, the waveguide includes a plurality of barriers (120) interleaved with the plurality of slots, the barriers separated from each other by the first distance, each of the barriers extending between the top and bottom faces and having a barrier cross-section with an area smaller than an area of the waveguide cross-section and an input port (130) coupled with the first end of the waveguide, the input port configured to receive an input waveform (101) to be guided by the waveguide.. ... Witricity Corporation

05/18/17 / #20170141622

Foreign object detection in wireless energy transfer systems

The disclosure features wireless energy transfer systems that include a plurality of sensors coupled to a controller, wherein the controller is configured to: obtain a system calibration state including a set of basis vectors derived from a first set of electrical signals generated by the plurality of sensors with no foreign object debris in proximity to the system; measure a second set of electrical signals from the sensors; calculate a projection of the second set of electrical signals onto the set of basis vectors; calculate a detection signal based on the projection; determine whether foreign object debris is present in proximity to the system by comparing the calculated detection signal to a detection threshold value; and adjust the system calibration state based on the presence or absence of foreign object debris in proximity to the system to generate an updated system calibration state.. . ... Witricity Corporation

05/11/17 / #20170133886

Wireless powered television

A wireless power system for powering a television includes a source resonator, configured to generate an oscillating magnetic field, and at least one television component attached to at least one device resonator, wherein the at least one device resonator is configured to wirelessly receive power from the source resonator via the oscillating magnetic field when the distance between the source resonator and the at least one device resonator is more than 5 cm, and wherein at least one television component draws at least 10 watts of power.. . ... Witricity Corporation

05/04/17 / #20170126069

Controllers for wireless power systems

The disclosure features high-resolution pulse-width modulation (hrpwm) controllers that can include a first channel having a first coarse_on register and a first coarse_off register and a counter configured to determine a repetition rate for the first channel. When a coarse_on value of the first coarse_on register and the counter are equal, the first channel can be set “active” and when a coarse_off value of the first coarse_off register and the counter are equal, the first channel can be set “inactive”. ... Witricity Corporation

04/27/17 / #20170118549

Wirelessly powered audio devices

Techniques herein provide wireless energy transfer to audio devices such as headphones, headsets, hearing aids, and the like. Audio devices are integrated with a device resonator. ... Witricity Corporation

04/27/17 / #20170117751

Dynamic tuning in wireless energy transfer systems

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for dynamically tuning circuit elements. One aspect includes a variable capacitance device. ... Witricity Corporation

04/20/17 / #20170111029

Phase and amplitude detection in wireless energy transfer systems

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for detecting characteristics of an input signal. One aspect includes a first finite input response (fir) filter, a second fir filter, and a controller coupled with the first and second fir filters. ... Witricity Corporation

04/06/17 / #20170098149

Rfid tag and transponder detection in wireless energy transfer systems

The disclosure features wireless power transmitters configured to detect a radio frequency identification (rfid) tag, the transmitters including a transmitter resonator, a transmitter impedance matching network coupled to the transmitter resonator, an amplifier coupled to the transmitter impedance matching network, a detection subsystem connected to the transmitter resonator, and a controller coupled to the amplifier and to the detection subsystem and configured so that during operation of the transmitter, the controller is configured to control the transmitter resonator, the amplifier, and the impedance matching network to cycle the transmitter between a power transmission mode and a rfid tag detection mode.. . ... Witricity Corporation

03/09/17 / #20170066335

Reconfigurable control architectures and algorithms for electric vehicle wireless energy transfer systems

A control architecture for electric vehicle wireless power transmission systems that may be segmented so that certain essential and/or standardized control circuits, programs, algorithms, and the like, are permanent to the system and so that other non-essential and/or augmentable control circuits, programs, algorithms, and the like, may be reconfigurable and/or customizable by a user of the system. The control architecture may be distributed to various components of the wireless power system so that a combination of local or low-level controls operating at relatively high-speed can protect critical functionality of the system while higher-level and relatively lower speed control loops can be used to control other local and system-wide functionality.. ... Witricity Corporation

02/23/17 / #20170054319

Wireless energy transfer for implantable devices

Wireless energy transfer apparatus include, in at least one aspect, a device resonator configured to supply power for a load by receiving wirelessly transferred power from a source resonator; a temperature sensor positioned to measure a temperature of a component of the apparatus; a tunable component coupled to the device resonator to adjust a resonant frequency of the device resonator, an effective impedance the device resonator, or both; and control circuitry configured to, in response to detecting a temperature condition using the temperature sensor, (i) tune the tunable component to adjust the resonant frequency of the device resonator, the effective impedance of the device resonator, or both, and (ii) signal the source resonator regarding the temperature condition to cause an adjustment of a resonant frequency of the source resonator, a power output of the source resonator, or both.. . ... Witricity Corporation

02/23/17 / #20170053737

Integrated resonator-shield structures

Described herein are configurations for an integrated resonator-shield structure for wireless power transfer. In embodiments a conductor shield is used to shield the resonator from perturbing objects. ... Witricity Corporation

02/16/17 / #20170047785

Wireless power enabled enclosures for mobile devices

The disclosure features mobile electronic devices configured to be wirelessly charged, the devices featuring a receiver resonator configured to capture oscillating magnetic flux, the receiver resonator including: a conductive material layer defining an aperture and a slit extending from the aperture to an outer edge of the conductive material layer, where the conductive material layer forms a back cover of the mobile electronic device, and an inductor having first and second conductor traces, the first trace coupled to a first portion of the conductive material layer adjacent to a first side of the slit and the second trace coupled to a second portion of the conductive material layer adjacent to a second side of the slit.. . ... Witricity Corporation

01/26/17 / #20170025904

Foreign object detection in wireless energy transfer systems

The disclosure features apparatus, methods, and systems for wireless power transfer that include a power source featuring at least one resonator, a power receiver featuring at least one resonator, a first detector featuring one or more loops of conductive material and configured to generate an electrical signal based on a magnetic field between the power source and the power receiver, a second detector featuring conductive material, and control electronics coupled to the first and second detectors, where during operation, the control electronics are configured to measure the electrical signal of the first detector and compare the measured electrical signal of the first detector to baseline electrical information for the first detector to determine information about whether debris is positioned between the power source and the power receiver.. . ... Witricity Corporation








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