Patent application number | Description | Published |
20140268895 | MIXED SEMICONDUCTOR H-BRIDGE POWER CONVERTERS AND METHODS RELATED THERETO - This disclosure provides systems, methods and apparatus for power converters and particularly power converters for wireless power transfer to remote systems such as electric vehicles. In one aspect, the disclosure provides an electronic power supply. The electronic power supply includes at least first and second half-bridge circuitries. The first half-bridge circuitry includes semiconductor material of a first type. The second half-bridge circuitry of the H-bridge includes semiconductor material of a second type. The first semiconductor material type is different from the second semiconductor material type. | 09-18-2014 |
20140320090 | INDUCTION POWER TRANSFER SYSTEM WITH COUPLING AND REACTANCE SELECTION - A power receiver is configured to supply current to a load and to be wirelessly operatively coupled to a power transmitter and includes a plurality of inductive elements. The power receiver further includes a circuit operatively coupled to the plurality of inductive elements and is configured to be selectively switched among a plurality of coupling states. The circuit is further configured to be selectively switched such that each inductive element has a reactance state of a plurality of reactance states. The power receiver further includes a controller configured to select the coupling state and to select the reactance state of each inductive element based on one or more signals indicative of one or more operating parameters of at least one of the power receiver and the power transmitter. | 10-30-2014 |
20140327391 | VEHICLE CHARGING PAD HAVING REDUCED THICKNESS - This disclosure provides systems, methods and apparatus for charging pads for use with wireless power systems. In one aspect a vehicle charging pad having a reduced thickness is provided. A charging pad may include multiple wire coils and a ferrite block backing. By forming a longitudinally extending slot in the ferrite block, a portion of the wires extending from the coils can be routed through the slot in the ferrite block to decrease the overall thickness of the charging pad. | 11-06-2014 |
20140340027 | SYSTEMS, METHODS, AND APPARATUS RELATED TO ELECTRIC VEHICLE WIRED AND WIRELESS CHARGING - One aspect provides an apparatus configured to receive wireless charging power and wired charging power. The apparatus includes a first rectifier configured to receive wired charging power and to provide a first rectified output. The apparatus further includes a second rectifier configured to receive wireless charging power and to provide a second rectified output. The apparatus further includes a power-factor correction (PFC) module configured to receive the first and second rectified outputs, and further configured to provide a power-factor corrected output. The apparatus further includes an isolated DC-DC converter configured to receive the power-factor corrected output and to provide an isolated DC output. The apparatus further includes and a battery configured to receive the isolated DC output. | 11-20-2014 |
20150061578 | SYSTEM AND METHOD FOR ALIGNMENT AND COMPATIBILITY DETECTION FOR A WIRELESS POWER TRANSFER SYSTEM - Systems, methods, and apparatuses for receiving charging power wirelessly are described herein. One implementation may include an apparatus for receiving charging power wirelessly from a charging transmitter having a transmit coil. The apparatus comprises a receiver communication circuit, coupled to a receive coil and to a load. The receiver communication circuit is configured to receive information associated with at least one characteristic of the charging transmitter. The apparatus further comprises a sensor circuit configured to measure a value of a short circuit current or an open circuit voltage associated with the receive coil. The apparatus further comprises a controller configured to compare the value of the short circuit current or the open circuit voltage to a threshold charging parameter set at a level that provides charging power sufficient to charge the load. The controller may be further configured to initiate receiving the charging power from the charging transmitter when the short circuit current or the open circuit voltage associated with the receive coil is greater than or equal to the threshold charging parameter. | 03-05-2015 |
20150077046 | SYSTEMS AND METHODS FOR BI-STATE IMPEDANCE CONVERSION IN WIRELESS POWER TRANSFER - One aspect provides a wireless power transmitter. The wireless power transmitter includes a transmit antenna configured to generate a field for wireless transmit power in both a first and second configuration. The wireless power transmitter further includes a first capacitor. The wireless power transmitter further includes at least one switch configured to selectively connect the first capacitor in one of the first and second configuration. The first capacitor can be in series with the transmit antenna in the first configuration and in parallel with the transmit antenna in the second configuration. | 03-19-2015 |
20150202970 | SYSTEMS AND METHODS FOR ELECTRIC VEHICLE INDUCTION COIL ALIGNMENT - Systems and methods in accordance with particular embodiments provide for alignment of an electric vehicle induction coil with a base system induction coil through a determination of the phase of a base system induction coil current signal. In certain embodiments, an electric vehicle induction coil that receives a transmission signal can be determined to be in greater alignment with a base system induction coil that transmits the transmission signal as the phases of the current signals at the base system induction coil and the electric vehicle induction coil converge. One embodiment includes a method of receiving wireless power, including detecting a transmission signal in a wireless power transmission, the transmission signal comprising periodic variations between a first frequency and a second frequency. The method further includes determining a phase of a base system induction coil signal based on the detected transmission signal. | 07-23-2015 |
20150270739 | SYSTEM AND METHOD FOR FREQUENCY PROTECTION IN WIRELESS CHARGING - This disclosure provides systems, methods, and apparatuses for controlling wireless charging between a first entity and a second entity. For example, the apparatus may include a receiver communication circuit of the first entity configured to receive a current from a second entity via electromagnetic induction during the charging or alignment with the second entity. The apparatus may include a frequency measurement circuit configured to determine an operating frequency of the received current or a voltage induced by the electromagnetic induction. The apparatus may include a controller configured to compare the operating frequency to a threshold and adjust an operation of the charging or the alignment based on the comparison. | 09-24-2015 |