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.

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 Ca1-x-yBaxSryTi1-zCrzO3-δNp, 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 Ca1-x-yBaxSry(Ca1-zCuz)Cu2Ti4-δAlδO12-0.5δ, wherein 0≦x<0.5; 0≦y<0.5; 0≦z<1; and 0≦δ≦0.1.

Methods and apparatus for controlling power in a polar modulation transmitter. An exemplary polar modulation transmitter includes a radio frequency power amplifier (RF PA), a phase path having circuitry operable to generate a constant amplitude phase modulated signal, and an amplitude path including an envelope modulator circuit having first and second envelope modulation paths. The RF phase modulated signal is applied to an RF input of the RF PA, while an envelope modulated power supply signal generated by a selected one of the first and second envelope modulation paths is coupled to a power supply input of the RF PA. The second envelope modulation path is selected during times when the power required by the RF PA is below some predetermined power level. During times when the RF PA requires power above the predetermined power level, the first envelope modulation path is selected.

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 multi-channel separation mechanism assembly for a lottery or other ticket dispensing machine includes a separate detachable feed mechanism associated with each separate feed channel, such that the feed mechanism for a single channel can be removed and replaced without replacing the entire assembly. Each such detachable feed mechanism includes a compact transmission wherein drive is efficiently transferred from a vertically-oriented feed motor to horizontally-oriented feed rollers. Each feed channel is additionally equipped with a bidirectional mechanical flag which triggers an optical sensor to detect presence of a ticket strip in the channel while still allowing appropriate reverse motion of the ticket strip within the associated channel.

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.

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 thermal barrier for a wireless power transfer system comprises a first surface area (807) for coupling to a power receiver (111) to be powered by a first electromagnetic signal and a second surface area (805) for coupling to a power transmitter (101) providing a second electromagnetic signal. The thermal barrier (801) further comprises a power repeater (803) with a resonance circuit including an inductor and a capacitor. The power repeater (803) is arranged to generate the first electromagnetic signal by concentrating energy of the second electromagnetic signal towards the first surface area (807). The thermal barrier may provide thermal protection of the power transmitter (101) without unacceptable impact on the power transfer operation.

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.

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.

The invention provides an ultra wide band bridge based on a thick film manufacturing technology. The ultra wide band bridge comprises a thick film circuit substrate, a coaxial cable, a magnetic core and a capacitor. The ultra wide band bridge is externally provided with three mutually connected ports P1, P2 and P3, wherein the port P1 and the port P3 are two radio frequency ports connected to a resistor power distribution circuit and the port P2 is connected to the unbalanced end of a Balun. When signals are transmitted in a non-inverting mode, the port P1 serves as an input port, and after resistor power distribution, partial power is coupled to the port P3 to be output and partial power is directly output through the port P2. When the signals are transmitted in an inverting mode, the port P2 serves as the input port, the signals are converted by the Balun from being unbalanced to being balanced, two routes of signals which are equal in amplitude and opposite in phase are obtained at the balanced end, the two routes of signals are offset at the port P3 through power distribution circuits respectively, signal isolation is achieved for the port P3, and partial power is directly output through the port P1. By the adoption of the ultra wide band bridge based on the thick film manufacturing technology, the applicable frequency of the directional bridge based on the Balun and the resistor power distribution circuit can be improved to be in a millimeter wave band, a larger working bandwidth can be realized, and the ultra wide band bridge is simple in structure and convenient to integrate.

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.

A mobile terminal may include a plurality of antennas to receive radio waves, a receiver circuit to receive power of the radio waves received by the plurality of antennas using a diversity technique, and a charging unit to charge a rechargeable battery coupled to the mobile terminal by the power of the radio waves received by the receiver circuit.

Dual frequency control of first and second pairs of switches of a buck-boost regulator with pass through band is disclosed. In buck and boost modes respectively a first pair of the switches is operated at high frequency and a second pair of the switches is operated at low frequency. In pass through mode, both pairs of switches are operated at low frequency. Dual frequency control and operation of the pairs of switches enables current sharing between positive and negative power leads in buck, boost and pass-through modes.

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.

A thermal barrier for a wireless power transfer system comprises a first surface area (807) for coupling to a power receiver (111) to be powered by a first electromagnetic signal and a second surface area (805) for coupling to a power transmitter (101) providing a second electromagnetic signal. The thermal barrier (801) further comprises a power repeater (803) with a resonance circuit including an inductor and a capacitor. The power repeater (803) is arranged to generate the first electromagnetic signal by concentrating energy of the second electromagnetic signal towards the first surface area (807). The thermal barrier may provide thermal protection of the power transmitter (101) without unacceptable impact on the power transfer operation.

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.

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.