#WiTricity Corporation

Foreign Object Detection Using Combined Inductive and Thermal Sensing

A method for detecting a foreign metal object near an inductive wireless power transfer system is based on combined inductive sensing and thermal sensing. A sensing system senses the object based on a…

DRIVE·Aug 3·1 min read

Foreign Object Detection Using Hybrid Inductive and Capacitive Sensing

In aspects, techniques for detecting and discriminating foreign objects near an inductive wireless power transfer system is disclosed. The method is based on hybrid inductive and capacitive sensing. T…

DRIVE·Aug 3·2 min read

Foreign Object Detection Using Heat Sensitive Material and Inductive Sensing

In certain aspects, an enclosure for a wireless power transfer pad is disclosed. The enclosure includes a cover shell configured to be positioned over a portion of the wireless power transfer pad conf…

DRIVE·Jun 15·1 min read

G01V3/104 WiTricity Corporation

Foreign Object Detection Circuit Using Mutual Impedance Sensing

The present disclosure describes techniques for detecting foreign objects. In some aspects, an apparatus for detecting objects is provided. The apparatus includes a plurality of sense circuits, each o…

DRIVE·Mar 30·1 min read

Foreign Object Detection Circuit

The present disclosure describes techniques for detecting foreign objects. In some aspects, an apparatus for detecting objects is provided. The apparatus includes a plurality of sense circuits, each o…

DRIVE·Mar 30·1 min read

G01V3/104 WiTricity Corporation

ACTIVE RECTIFICATION IN WIRELESS POWER SYSTEMS

Disclosed herein are methods and systems for controlling an active rectifier of a wireless power receiver. The exemplary methods can include determining a reference value of a current into the rectifi…

DRIVE·Mar 16·1 min read

H02M1/126 WiTricity Corporation

Active Harmonics Cancellation

Systems and methods are described for active harmonics cancellation. A wireless charging apparatus includes a wireless-power transfer circuit comprising a wireless-power transfer coil configured to ge…

DRIVE·Jan 12·1 min read

Circuit for Object Detection and Vehicle Position Determination

A multi-purpose detection circuit for object detection and vehicle position determination is described. For example, the circuit is configurable for detecting foreign metallic objects, living objects,…

DRIVE·Jan 5·1 min read

G01V3/088 WiTricity Corporation

Fault Detection and Monitoring Methods for Safe Operation of a WEVC System

A wireless electric vehicle charging system comprises base-side equipment for generating a magnetic field and vehicle-side equipment for receiving energy via the magnetic field to supply power to a ve…

DRIVE·Dec 1·1 min read

H02J50/10 WiTricity Corporation

SYSTEMS, METHODS, AND APPARATUS FOR DETECTING FERROMAGNETIC FOREIGN OBJECTS IN A PREDETERMINED SPACE

An apparatus for detecting a presence of an object includes an inductive sensing coil that is configurable to generate a magnetic field. The inductive sensing coil is configured to have an electrical …

DRIVE·Oct 13·1 min read

G01V3/10 WiTricity Corporation

BIDIRECTIONAL OPERATION OF WIRELESS POWER SYSTEMS

Described herein are active rectification methods and systems for a rectifier of a wireless power system. Exemplary methods can include detecting, by a zero-crossing detector, one or more zero-crossin…

DRIVE·Sep 8·1 min read

Wire-Wound Structures for Electromagnetic Sensing of Objects

This disclosure provides an apparatus for detecting a presence of an object in a predetermined area of an inductive wireless power transfer system. The apparatus comprises a first wire-wound structure…

DRIVE·Jul 28·1 min read

B60L53/126 WiTricity Corporation

WIRELESS POWER ANTENNA ALIGNMENT ADJUSTMENT SYSTEM FOR VEHICLES

Exemplary embodiments are directed to wireless charging and wireless power alignment of wireless power antennas associated with a vehicle. A wireless power charging apparatus includes an antenna inclu…

DRIVE·May 12·1 min read

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 devi…

DRIVE·Apr 21·1 min read

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 devi…

DRIVE·Apr 21·1 min read

SYSTEMS AND METHODS FOR LOW POWER EXCITATION IN HIGH POWER WIRELESS POWER SYSTEMS

Disclosed herein are systems and methods for low power excitation of wireless power transmitters configured to transmit high power. The exemplary systems and methods include disabling a power factor c…

DRIVE·Apr 14·1 min read

SYSTEMS AND METHODS FOR LOW POWER EXCITATION IN HIGH POWER WIRELESS POWER SYSTEMS

Disclosed herein are systems and methods for low power excitation of wireless power transmitters configured to transmit high power. The exemplary systems and methods include disabling a power factor c…

DRIVE·Mar 31·1 min read

Extended Foreign Object Detection Signal Processing

Systems and methods are described for extended foreign object detection (FOD) signal processing. In aspects, an oscillator reset is implemented in a FOD system to mitigate the effects of intermodulati…

DRIVE·Mar 17·1 min read

G05F1/625 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…

DRIVE·Mar 17·1 min read

Extended Foreign Object Detection Signal Processing

Systems and methods are described for extended foreign object detection (FOD) signal processing. In aspects, an oscillator reset is implemented in a FOD system to mitigate the effects of intermodulati…

DRIVE·Mar 17·1 min read

Extended-Range Positioning System Based on Foreign-Object Detection

Systems and methods are described for an extended-range positioning system based on foreign-object detection (FOD). In particular, a power-transfer apparatus is disclosed that includes a coil and a fo…

DRIVE·Feb 10·1 min read

SYSTEMS, METHODS, AND APPARATUS FOR DETECTION OF METAL OBJECTS IN A PREDETERMINED SPACE

This disclosure provides systems, methods and apparatus for detecting foreign objects. In one aspect an apparatus for detecting a presence of an object is provided. The apparatus includes a resonant c…

DRIVE·Nov 18·2 min read

H02M7/217 WiTricity Corporation

ACTIVE RECTIFICATION IN WIRELESS POWER SYSTEMS

Disclosed herein are active rectifiers for wireless power receivers. The exemplary active rectifier can include a first diode coupled between a first input of the rectifier and an output of the rectif…

DRIVE·Sep 23·1 min read

PROTECTION AND CONTROL OF WIRELESS POWER SYSTEMS

One general aspect includes methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for fault protection of a bidirectional wireless power transfer system. T…

DRIVE·Sep 23·1 min read

PROTECTION AND CONTROL OF WIRELESS POWER SYSTEMS

Methods, systems, and devices for protecting a wireless power transfer system. One aspect features a sensor network for a wireless power transfer system. The sensor network includes a differential vol…

DRIVE·Sep 23·1 min read

B60L53/65 WiTricity Corporation

Fault Detection and Monitoring Methods for Safe Operation of a WEVC System

A wireless electric vehicle charging system comprises base-side equipment for generating a magnetic field and vehicle-side equipment for receiving energy via the magnetic field to supply power to a ve…

DRIVE·Aug 26·1 min read

SYSTEMS AND METHODS FOR AUXILIARY POWER DROPOUT PROTECTION

The disclosure features circuits and methods for protecting transistors of a wireless power receiver, which can be controlled by gate drivers powered by an auxiliary power source. The circuit can incl…

DRIVE·Jul 29·2 min read

H02H7/125 WiTricity Corporation

TUNABLE REACTANCE CIRCUITS FOR WIRELESS POWER SYSTEMS

Disclosed herein are tunable reactance circuits configured to present a tunable or variable capacitive reactance when energized. The circuits can include a switch configured to be controlled by a gate…

DRIVE·Jul 29·1 min read

H03H11/02 WiTricity Corporation

GATE DRIVER IMPLEMENTATIONS FOR SAFE WIRELESS POWER SYSTEM OPERATION

The disclosure features systems and methods for protecting transistors of a wireless power receiver. Systems can include a gate driver configured provide a control signal to control switching of the t…

DRIVE·Jul 29·1 min read

H02H7/20 WiTricity Corporation

Foreign Object Detection Circuit Using Mutual Impedance Sensing

The present disclosure describes techniques for detecting foreign objects. In some aspects, an apparatus for detecting objects is provided. The apparatus includes a plurality of sense circuits, each o…

DRIVE·Jul 29·1 min read

G01V3/104 WiTricity Corporation

Hybrid Foreign-Object Detection and Positioning System

An apparatus is disclosed for a hybrid foreign-object detection and position system. In an example aspect, a foreign object detection (FOD) system of the base power-transfer system detects a passive b…

DRIVE·Jun 24·1 min read

WIRELESS POWER TRANSFER SYSTEMS FOR SURFACES

The disclosure features wireless energy transfer sources that include at least two source resonators and a power source, where: each of the at least two source resonators has a nominal impedance when …

DRIVE·Jun 3·1 min read

FOREING OBJECT DETECTION USING HEAT SENSITIVE MATERIAL AND INDUCTIVE SENSING

In certain aspects, an enclosure for a wireless power transfer pad is disclosed. The enclosure includes a cover shell configured to be positioned over a portion of the wireless power transfer pad conf…

DRIVE·May 13·1 min read