Abstract:
A composite metal surface that looks metallic, but permits effective transmission of an electromagnetic field. The composite metal surface can be integrated into various electronic equipment, such as telephones, remote controls, battery doors, keyboards, mice, game controllers, cameras, laptops, inductive power supplies, and essentially any other electronic equipment. The composite metal surface can also be integrated into non-electrically conductive heat sinks, high permeability shielding, and polished metal non-electrically conductive surfaces.
Abstract:
A system and method of controlling inductive power transfer in an inductive power transfer system and a method for designing an inductive power transfer system with power accounting. The method of controlling inductive power transfer including measuring a characteristic of input power, a characteristic of power in the tank circuit, and receiving information from a secondary device. Estimating power consumption based on the measured characteristic of tank circuit power and received information and comparing the measured characteristic of input power, the information from the secondary device, and the estimated power consumption to determine there is an unacceptable power loss. The method for designing an inductive power transfer system with power accounting including changing the distance between a primary side and a secondary side and changing a load of the secondary side. For each distance between the primary side and the secondary side and for each load, measuring a circuit parameter on the primary side in the tank circuit and a circuit parameter on the secondary side during the transfer of contactless energy. The method further including selecting a formula to describe power consumption in the system during the transfer of contactless energy based on coefficients and the circuit parameters, and determining the coefficients using the measured circuit parameters.
Abstract:
The present invention provides a wireless power supply system in which a remote device is provided with different control methodologies depending on one or more factors. One type of wireless power supply can selectively control one or more remote devices according to a first control methodology and another type of wireless power supply can control the remote device according to a second control methodology. In one embodiment, a wireless power supply system is provided for wirelessly powering a display circuit in a product located at a point of display differently than when charging at a point of use, or when the device is in use. In another embodiment, a wireless power supply is programmed to operate a remote device according to a primary control methodology and the remote device is programmed to operate the remote device according to a secondary control methodology where the remote device includes circuitry for enabling the primary control methodology instead of the secondary control methodology.
Abstract:
The present invention provides a wireless power supply system in which a remote device is provided with different control methodologies depending on one or more factors. One type of wireless power supply can selectively control one or more remote devices according to a first control methodology and another type of wireless power supply can control the remote device according to a second control methodology. In one embodiment, a wireless power supply system is provided for wirelessly powering a display circuit in a product located at a point of display differently than when charging at a point of use, or when the device is in use. In another embodiment, a wireless power supply is programmed to operate a remote device according to a primary control methodology and the remote device is programmed to operate the remote device according to a secondary control methodology where the remote device includes circuitry for enabling the primary control methodology instead of the secondary control methodology.
Abstract:
A system and method for mitigating interference between two or more inductive systems. Interference can be mitigated by, in response to an interference causing event, temporarily adjusting operation of one or more of the inductive sub-systems to reduce interference. A controller can receives communication from multiple inductive systems and instruct the systems to operate so as to reduce interference. The inductive systems can coordinate to operate out of phase with respect to one another to reduce interference. Communication from a data transfer inductive system can be mimicked by another inductive system so that both systems transmit the communication. Interference between multiple inductive systems can be mitigated by specific physical positioning of the transmitters of the inductive sub-systems.
Abstract:
An electrical component with conductive material(s) that is suitable for use within the electromagnetic field path of a wireless power transfer system. The electronic component includes conductive materials that are sufficiently thin to absorb no more than an acceptable amount of the electromagnetic field, yet thick enough to remain sufficiently conductive to perform the desired electrical function. In embodiments in which the wireless power supply delivers up to 20 watts of power, the conductive materials are not substantially thicker than about 1/10 the skin depth of the material at the anticipated wireless power frequency. The electrical component may be disposed at any location between the wireless power supply transmitter and the remote device receiver. The present invention permits the use of a wide rang of electrical components in the field path, such as a display, a sensor or a component capable of selectively operating as both.
Abstract:
A system and method for mitigating interference between two or more inductive systems. Interference can be mitigated by, in response to an interference causing event, temporarily adjusting operation of one or more of the inductive sub-systems to reduce interference. A controller can receives communication from multiple inductive systems and instruct the systems to operate so as to reduce interference. The inductive systems can coordinate to operate out of phase with respect to one another to reduce interference. Communication from a data transfer inductive system can be mimicked by another inductive system so that both systems transmit the communication. Interference between multiple inductive systems can be mitigated by specific physical positioning of the transmitters of the inductive sub-systems.
Abstract:
A communication system that uses keyed modulation to encode fixed frequency communications on a variable frequency power transmission signal in which a single communication bit is represented by a plurality of modulations. To provide a fixed communication rate, the number of modulations associated with each bit is dynamic varying as a function of the ratio of the communication frequency to the carrier signal frequency. In one embodiment, the present invention provides dynamic phase-shift-keyed modulation in which communications are generated by toggling a load at a rate that is a fraction of the power transfer frequency. In another embodiment, the present invention provides communication by toggling a load in the communication transmitter at a rate that is phase locked and at a harmonic of the power transfer frequency. In yet another embodiment, the present invention provides frequency-shift-keyed modulation, including, for example, modulation at one of two different frequencies.
Abstract:
Systems and methods are provided for determining an individual's personal correlation factor and, using the personal correlation factor, determining the individual's caloric intake. A method for determining a personal correlation factor includes determining a body composition change over a calibration period, converting the body composition change to an equivalent energy value, and dividing the equivalent energy value by a net caloric value for the same calibration period, wherein the net caloric value includes a caloric expenditure less a caloric intake. A method for determining a subsequent caloric intake includes converting a body composition change to an equivalent energy value, dividing the equivalent energy value by the personal correlation value, and adding to this quotient the individual's caloric expenditure, wherein each step is performed using a processor.
Abstract:
The present invention relates to a wireless power supply system including a remote device capable of both transmitting and receiving power wirelessly. The remote device includes a self-driven synchronous rectifier. The wireless power supply system may also include a wireless power supply configured to enter an OFF state in which no power, or substantially no power, is drawn, and to wake from the OFF state in response to receiving power from a remote device.