Patent application number | Description | Published |
20130229061 | INDUCTIVE POWER TRANSFER SYSTEM PRIMARY TRACK TOPOLOGIES - A multiphase IPT primary track conductor arrangement comprising a first phase conductor and a second phase conductor, the conductors being arranged substantially in a plane and so as to overlap each other and being arranged such that there is substantially balanced mutual coupling between the phase conductors. | 09-05-2013 |
20130270921 | INDUCTIVE POWER TRANSFER APPARATUS - An IPT system magnetic flux pad includes two substantially planar coils ( | 10-17-2013 |
20130285463 | INDUCTIVE POWER RECEIVER APPARATUS - A magnetic flux pad (BPP) is provided for receiving magnetic flux. The pad may be used with an inductive power transfer system, and comprises a magnetically permeable core ( | 10-31-2013 |
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 |
20150298559 | BASE DISTRIBUTION NETWORK FOR DYNAMIC WIRELESS CHARGING - Dynamic systems may require a large number of coils (charging pads) which may be installed into the roadway to wirelessly provide power to electric vehicles as they are traveling along the roadway. The current in each of these coils may need to be turned on and off as a vehicle drives over the coils in order to efficiently utilize power and properly convey power to the passing vehicles. The supply network behind these coils may need to be capable of managing the individual coils with minimal infrastructure and cost as well as be capable of distributing the required power from the power grid to these pads efficiently and safely. The supply network may include charging coils, switches, local controllers, and distribution circuitry within a modular element, which may receive power from external sources and may be controlled by a central controller. | 10-22-2015 |
20150298560 | BASE MAGNETICS AND SEQUENCE DESIGN FOR DYNAMIC SYSTEMS - Dynamic wireless charging systems may involve coordinating multiple charging base pads to provide coordinated, continuous power transfers to a moving receiver along the distance in which the dynamic wireless charging system is installed. The layout and design of the charging base pads, the current flow through the charging base pads, and the sequencing of charging base pad activation and current flow implemented may dramatically affect the power transfers and practicality of such dynamic systems. The sequencing and control of these coils may need to be capable of managing the individual coils with minimal infrastructure as well as be capable of distributing the required power from the power grid to these pads efficiently and safely, and may comprise charging base pads, controllers to control the power flow to, activation of, and current flow direction within the base pads. | 10-22-2015 |
20150298561 | BASE ARRAY NETWORK DESIGN FOR MULTIPLE VEHICLE PADS - Dynamic wireless charging systems may involve coordinating multiple charging base pads to provide coordinated, continuous power transfers to a moving receiver along the distance in which the dynamic wireless charging system is installed. These dynamic systems may require a large number of coils (base pads) which may be components in base array networks (BAN modules). The BAN modules may provide for simplified installation and system design wherein the BAN modules may be preassembled and self-contained, drop-in-place units. The layout and design of the BAN modules may be such that they may contain charging base pads, local controllers, distribution circuitry, and switching controls. The sizing of the BAN modules may dramatically affect the usability and practicality of such dynamic systems. The sizing of the BAN modules may be dependent upon the pitch between vehicle pads on electric vehicles and base pad pitch within the BAN modules. | 10-22-2015 |
20150303714 | DEVICES, SYSTEMS, AND METHOD FOR POWER CONTROL OF DYNAMIC ELECTRIC VEHICLE CHARGING SYSTEMS - Systems, methods, and apparatus are disclosed for wirelessly charging an electric vehicle. In one aspect, a method of wirelessly charging an electric vehicle is provided. The method includes, obtaining a request from the electric vehicle for a level of charging power to be delivered from a power transmitter to the electric vehicle via a charging field. The method further includes controlling a current or voltage of the power transmitter based on a power efficiency factor and the requested level of charging power. | 10-22-2015 |
20160028240 | INDUCTIVE POWER TRANSFER APPARATUS - A magnetic flux pad for receiving or generating magnetic flux. The pad includes two pole areas ( | 01-28-2016 |
20160068070 | METHODS AND APPARATUS FOR TUNING AND CONTROLLING DOUBLE COUPLE INDUCTIVE POWER TRANSFER SYSTEMS - An apparatus for transmitting charging power wirelessly to a vehicle is provided. The apparatus comprises a first coupler having a first reactance at an operating frequency and configured to wirelessly receive power from a power source, the first coupler wound on a ferromagnetic core. The apparatus comprises a first capacitor having a second reactance at the operating frequency and electrically connected in series with the first coupler, the second reactance having a magnitude equal to a magnitude of the first reactance. The apparatus comprises a second capacitor electrically connected in parallel across the first coupler and the first capacitor. The apparatus comprises a first base coupler configured to be electrically connected in parallel across the second capacitor via a first switch. A magnitude of a peak voltage across the second capacitor is proportional to a magnitude of a peak voltage induced in the first coupler at the operating frequency. | 03-10-2016 |
20160072299 | SYSTEM AND METHOD FOR REACTIVE POWER CONTROL IN DYNAMIC INDUCTIVE POWER TRANSFER SYSTEMS - Systems and methods for dynamically tuning reactive power in an inductive power transfer system are disclosed. The system comprises a first plurality of coils operably coupled to a respective ferromagnetic material, configured to receive wireless power via the ferromagnetic material from a power source. The system further comprises a plurality of switches configured to selectively control power received by certain of the first plurality of coils. The system further comprises a second plurality of coils configured to receive current from respective ones of the first plurality of coils and deliver wireless power to a wireless power receiver. The system further comprises at least one control unit configured to selectively activate the switches. The switches may be set to provide power from the power source to a portion of the plurality of the second coils or selectively increase or decrease the reactive power load of the power source. | 03-10-2016 |
20160126746 | SYSTEMS, METHODS, AND APPARATUS FOR INTEGRATED TUNING CAPACITORS IN CHARGING COIL STRUCTURE - Systems, methods, and apparatus are disclosed for power transfer including a plurality of coil structures located over a ferrite element, the plurality of coil structures configured to generate a high flux region and a low flux region, the low flux region being located between the plurality of coil structures, and a tuning capacitance located directly over the ferrite element in the low flux region. | 05-05-2016 |