39results about How to "Efficient power transfer" patented technology

A wireless power system that may align a portable electronic device with an inductive wireless power supply. The induction coils used for transferring power wirelessly may be used as DC electromagnets to align the portable electronic device with the inductive wireless power supply. A DC current may be supplied to the primary coil and to the secondary coil to generate DC electromagnetic fields and attractive force between the primary and secondary coils. This attractive force may be used for alignment.

Methods and systems are provided for controlling a power transfer rate in to and/or out of a vehicle energy storage device to affect a current state of charge of the energy storage device. The vehicle may be on a mission comprising a plurality of future power transfer opportunities. In one example, the method comprises adjusting the power transfer rate based on an estimated duration of a future power transfer opportunity. Further, the method may include, if the estimated duration of the future power transfer opportunity is different from a predetermined threshold, changing the power transfer rate at the future power transfer opportunity. The method allows the operating life of the energy storage device to be extended.

Systems and methods are described for controlling a power transfer rate in to and/or out of an energy storage device on-board a vehicle, such as a locomotive, during a power transfer opportunity. In one example, the method includes adjusting the power transfer rate based on a predetermination of a duration of the power transfer opportunity to match a duration of power transfer to the duration of the opportunity and achieve a specified state of charge.

A flap support structure for an aircraft wing having a trailing edge flap, the flap support structure comprising: a flap support beam including an aerodynamic fairing; and a drive unit including a universal support structure which rotatably receives a drive shaft connected to a drive arm for moving the trailing edge flap, wherein the universal support structure also forms part of the flap support beam and supports the aerodynamic fairing.

A contactless power transfer system is proposed. The power transfer system comprises a field-focusing element comprising a dielectric material. The dielectric material comprises a composition that is selected from the family of (Ba,Sr)TiO₃ or CaCu₃Ti₄O₁₂. The compositions of the (Ba, Sr)TiO₃ include the materials such as Ca_1-x-yBa_xSr_yTi_1-zCr_zO_3-δN_p, wherein 0<x<1; 0<y<1; 0≦z≦0.01; 0≦δ≦1; and 0≦p≦1. The compositions of the CaCu₃Ti₄O₁₂ include the materials such as Ca_1-x-yBa_xSr_y(Ca_1-zCu_z)Cu₂Ti_4-δAl_δO_12-0.5δ, wherein 0≦x<0.5; 0≦y<0.5; 0≦z<1; and 0≦δ≦0.1.

In a wireless power transfer system, a resonant circuit is formed on the secondary coil side, phase information of a resonant current flowing in the resonant circuit is detected, and, based on this phase information, a driving frequency is determined so that the current phase of a driving current flowing in a primary coil slightly delays from the voltage phase, thereby driving the primary coil. A Q valued determined based on a leakage inductance of the secondary coil, a capacitance of a resonant capacitor, and an equivalent load resistance is set to a value greater than or equal to a value determined by Q=2/k² (k is a coupling coefficient).

A wireless power transfer system comprises a power transmitter (101) arranged to wirelessly power a power receiver (103) via an inductive signal. The power transmitter (101) comprises a variable resonance circuit for generating the inductive signal in response to a drive signal. The resonance circuit has a variable resonance frequency and comprises a transmitter coil (121) arranged to generate the inductive signal. A driver (707) generates the drive signal for the variable resonance circuit and a modulator (711) amplitude modulates the inductive signal by varying the variable resonance frequency in response to data values for transmission to the power receiver (105). The power receiver (105) comprises a demodulator (1105) for demodulating amplitude modulation of the inductive signal and a first power extractor (1113) for extracting power from the inductive signal and for powering at least part of the power receiver. The inductive signal may be provided in addition to a higher power main power transfer signal.

A wireless power transmitter (101)) comprises a resonance circuit (201) comprises a transmitter inductor (103) for generating a power transfer signal for wirelessly transferring power to the power receiver (105). A driver (203) generates a drive signal for the resonance circuit (201) and a resonance modification circuit (505) aligns the resonance frequency of the resonance circuit (201) with the drive frequency of the drive signal by slowing a state change for resonance circuit (201) for a fractional time interval of cycles of the drive signal. A load estimator (509) generates a load estimate reflecting an equivalent load resistor for the transmitter inductor (103) reflecting the loading of the power transfer signal. A drive frequency adapter (511) then adapts the drive frequency in response to the load estimate. The invention may in particular improve load modulation communication quality.

The embodiment of the invention provides a method and system for conducting power supply control on intelligent home systems in a community micro grid. The method mainly includes the steps that a community power supply controller receives household electricity consumption information sent by home power supply control devices in the intelligent home systems, wherein the household electricity consumption information includes electricity loads of all electric equipment, power generation states of a power generation device and electric energy amount information stored in electric energy storage and transmission devices; the community power supply controller judges whether the power consumption states of the intelligent home systems are idle or not and sends an electric output control instruction to the home power supply control device after determining the power generation state of the power generation device to be normal; the home power supply control device informs the intelligent home systems to transmit stored redundant electric power to the community power supply controller after receiving the electric output control instruction. According to the method and system for conducting power supply control on the intelligent home systems in the community micro grid, an effective electric power transmission function and an effective power supply control function can be achieved in the multiple intelligent home systems in the distributed type micro grid.

A bicycle 10 providing increased power transfer and improved aerodynamic characteristics. The bicycle includes a seat assembly 70 that supports the anterior pelvic region so the rider extends forwardly over the bicycle instead of in an upright position. The bicycle also includes a rear mounted drive assembly 80 to increase the power transfer from the rider.

The technology provides for a wireless charger. The wireless charger may have a transmitter antenna array, one or more detectors, one or more sensors, and one or more processors. For instance, the processors may determine, based on signals from the detectors, that one or more receiver antennas are located within a near-field range of the transmitter antenna array. The processors may then control the transmitter antenna array to focus electromagnetic waves on a first receiver antenna of the one or more receiver antennas, and control the transmitter antenna array to transmit power to the first receiver antenna. In some instances, the processors may further determine, based on signals from the sensors, that a person is located within the near-field range of the transmitter antenna array. Based on this determination, the processors may control the transmitter antenna array to stop transmitting power to the first receiver antenna.

The invention discloses a community distributed power grid operation and transaction settlement method based on a block chain, and the method comprises more than two user household power supply control devices, the user household power supply control devices are connected through wires, and each user household power supply control device is connected to a power grid in parallel. The user householdpower supply control device comprises photovoltaic power generation equipment, electric energy storage and transmission equipment and a microcomputer controller, and real-time settlement is adopted for transactions performed with a power grid. For transactions performed with a user, time-phased settlement is employed. According to the invention, functions of effectively buying electricity and selling electricity, transmitting electric energy and controlling power supply of a plurality of user household power supply control devices in the distributed grid-connected microgrid can be realized.

An energy harvesting circuit is provided that consists of two parallel paths, each comprising a transformer, full wave rectifier, and capacitor. An ultra-low-power microcontroller operates a double-position double-throw switch, which switches the capacitors from charging from the input, to providing energy to the output.