Abstract: The present invention relates to a device and a method for transmitting or receiving data in a wireless power transmission system. The present specification discloses a wireless power reception device comprising: a power pickup unit configured to receive, from a wireless power transmission device, wireless power generated on the basis of magnetic coupling in a power transmission phase; and a communication/control unit configured to receive, from the wireless power transmission device, information on a first buffer size indicating the size of a first buffer for receiving a data transmission stream. As the buffer size for exchanging the data transmission stream between the wireless power transmission device and reception device becomes clear, wireless power transmission and communication can proceed smoothly.

Abstract: A power supply apparatus (such as an air conditioner) may have a power saving function. A first power supply unit may be connected to an AC power supply and a first communication unit may be connected to the first power supply unit and to a communication line. A connector may be connected to the first communication unit and the communication line. A first controller may be connected to the first communication unit and the connector. A second communication unit may have one side connected to the communication line and the other side connected to the AC power supply. A second power supply unit may be connected to the AC power supply. A wakeup voltage generator may be connected to the communication line and the second power supply unit to generate a voltage. A second controller may be connected to the second communication unit and the wakeup voltage generator.

Abstract: There are provided a power supply system for a diesel multiple-unit train, a diesel multiple-unit train including the power supply system, and a traction control method for a diesel multiple-unit train. The power supply system includes: a diesel power pack, a traction inverter connected to a traction motor, and an auxiliary inverter connected to a train load. The power supply system further includes a direct current chopper and a supercapacitor. A high-voltage side of the direct current chopper is connected to the diesel power pack, and a low-voltage side of the direct current chopper is connected to the supercapacitor. The supercapacitor is connected to the traction inverter and the train load.

Abstract: In various embodiments, a power transmitting device includes a wireless power generator configured to generate a wireless power signal. A transmit resonator is configured to transmit the wireless power signal via a transmit magnetic field to a power receiving unit. The transmit resonator includes a transmit coil configured to generate that transmit magnetic field in response to the wireless power signal. At least one variable magnetic element is configured to adjust at least one property of the transmit coil by varying a reluctance of the at least one variable magnetic element in response to at least one control signal. A processing device is configured to generate the at least one control signal to select the reluctance corresponding to the at least one property of the transmit coil.

Abstract: Techniques for static tuning retro-directive wireless power transmission systems are described herein. The techniques described herein include systems, methods and software for establishing a static tuning mode for a retro-directive wireless power transmission system. The static tuning mode can generate an extended stable power sphere that facilitates accurate RF and other measurements. Additionally, techniques are provided for characterizing the wireless power delivery paths.

Abstract: A method for displaying time information in an electronic device in a low power state is provided. The method includes transferring a power-off command and a reboot command to the electronic device if a power level of a battery is equal to or less than a first level, setting a power-off flag in a boot loader, entering into a power-off state, and displaying, on a display, current time related information for a predetermined time under the control of the boot loader if a specific event occurs in the power-off state.

Abstract: A bus architecture for supplying power to loads in a datacenter includes a first DC bus including a first bus conductor and a first plurality of source/load groups. Each of the first plurality of source/load groups includes a first power source and a first plurality of loads, wherein at least one of the first plurality of loads includes a server rack. The first power source in each of the first plurality of source/load groups is sized to supply power to the first plurality of loads for the corresponding one of the first plurality of source/load groups. The first power source in each of the first plurality of source/load groups is also sized to provide excess capacity to be shared by the first plurality of loads corresponding to other ones of the first plurality of source/load groups.

Abstract: Provided is an integrated circuit package which complementarily switches on/off a MOS transistor Q1 (first switch) and MOS transistor Q2 (second switch) in accordance with an output voltage Vout, and which externally outputs a pulse signal having a fixed on-duty D during a step-up/step-down mode. The integrated circuit package has a determination unit 61 for determining the impedance of an external component connected to an external pin P5 that outputs the pulse signal to the exterior during the step-up/step-down mode, and determining whether the external component is a third switch on the basis of the impedance determination result.

Abstract: The power distribution device includes a power regulating device and a first auxiliary power distribution component. The power regulating device has a first output end connected to an AC power grid and a second output end. The first auxiliary power distribution component has a first movable end electrically connected to a load, a first fixed end electrically connected to the AC power grid and a second fixed end electrically connected to the second output end, and a ground line of the second fixed end is grounded. When the AC power grid is normal, the first movable end is connected to the first fixed end, such that the AC power grid supplies power to the load. And when the AC power grid is abnormal, the first movable end is connected to the second fixed end, such that the power regulating device supplies power to the load through the second output end.

Abstract: An on-vehicle circuit unit includes a first conductor that is a power supply line, a second conductor that is a ground line a dielectric that is disposed between the first conductor and the second conductor.

Abstract: A constant-current controller that supplies a constant-current to a solenoid driver for use with an electromechanical device. The controller comprises a PCB containing a constant-current control circuit. The circuit comprises a GaNFET primary switch and a secondary switch. The PCB is integrated with and made a part of the solenoid driver. A standard electromechanical device may be converted to a constant-current controlled electromechanical device by exchanging the solenoid driver.

Abstract: A transformer system is provided that includes four magnetically coupled coils having fixed spacing geometry. The four magnetically coupled coils include a drive coil that produces magnetic fields and a load coil. A first resonant coil is magnetically coupled to the drive coil producing energy that is stored by the first resonant coil. A second resonant coil is magnetically coupled to the first resonant coil to propagate the energy stored in the first resonant coil to the second resonant coil without using a magnetic core. The second resonant coil is then magnetically coupled to the load coil where the energy is transferred to the load coil.

Abstract: Various embodiments of a wireless connector system are described. The system has a transmitter module and a receiver module that are configured to wirelessly transmit electrical energy and/or data via near field magnetic coupling. The wireless connector system is designed to increase the amount of wirelessly transmitted electrical power over a greater separation distance. The system is configured with various sensing circuits that alert the system to the presence of the receiver module to begin transfer of electrical power as well as undesirable objects and increased temperature that could interfere with the operation of the system. The wireless connector system is a relatively small foot print that is designed to be surface mounted.

Abstract: A fault ride-through circuit with a variable frequency transformer (VFT) and a control method thereof are provided, and the control method comprises: pretreating acquired voltages of grids, a voltage of a stator interface and a voltage of a rotor interface to obtain a rotor voltage DC component and a rotor voltage DC component; testing and treating a voltage frequency of a first grid and a voltage frequency of a second grid; carrying out a reference voltage calculation for a stator voltage DC component, a rotor voltage DC component, the voltage frequencies of the first grid and the second grid to obtain a positive voltage reference value of the first PWM convertor and the second PWM convertor; and processing the voltage reference values to obtain the switch signals for controlling the first PWM convertor and the second PWM convertor.

Abstract: A power system and a power method for a power system that includes a first power source operatively connected to an input of a first power device. The power system also includes a switch unit having a first input operatively connected to the output of the first power device. The power system further includes a second power source operatively connected to a second input of a second power device. A second output of the second power device connects to a second input of the switch unit, wherein a third output of the switch unit provides an output parameter responsive to at least one of the output of the first power device and the second output of the second power device.

Abstract: Various embodiments of a wireless connector system are described. The system has a transmitter module and a receiver module that are configured to wirelessly transmit electrical energy and/or data via near field magnetic coupling. The wireless connector system is designed to increase the amount of wirelessly transmitted electrical power over a greater separation distance. The system is configured with various sensing circuits that alert the system to the presence of the receiver module to begin transfer of electrical power as well as undesirable objects and increased temperature that could interfere with the operation of the system. The wireless connector system is a relatively small foot print that is designed to be surface mounted.

Abstract: A power-transmitter-unit includes a power-transmitting-coil for wirelessly providing power to a power-receiver-unit, and a resonant-capacitor connected to the power-transmitting-coil, such that together they define an LC circuit. The LC circuit includes a first-end and a second-end. A controller defines a foreign-object-detection-mode of operation, wherein, in the foreign-object-detection-mode of operation, the first-end of the LC circuit is connected to the second-end of the LC circuit such that the LC circuit is short-circuited and defines a closed-LC-circuit, and the controller is configured to receive a coil-current-signal that is representative of the current through the closed-LC-circuit.

Abstract: Various embodiments of a wireless connector system are described. The system has a transmitter module and a receiver module that are configured to wirelessly transmit electrical energy and/or data via near field magnetic coupling. The wireless connector system is designed to increase the amount of wirelessly transmitted electrical power over a greater separation distance. The system is configured with various sensing circuits that alert the system to the presence of the receiver module to begin transfer of electrical power as well as undesirable objects and increased temperature that could interfere with the operation of the system. The wireless connector system is a relatively small foot print that is designed to be surface mounted.

Abstract: A system and method for supplying uninterruptible power includes a housing, a power supply input connected to a solar panel as a power supply, a main network input, a powered device output, an alternative power supply as a plurality of batteries, and a control module. The power supply input includes a controller and power distribution unit to manage the solar panel. The main network input and control module are also modified to include an adapter, a power management processor, and a network management processor. There can be a panel irradiance sensor on the solar panel and connected to the power management processor. The system can be located at a remote location with only the solar panel connected to the power supply input.

Abstract: A DC circuit breaker includes: a mechanical switch provided on an electrical path through which a direct current flows; and a semiconductor switch connected in parallel with the mechanical switch. The mechanical switch includes a gas disconnector and a vacuum circuit breaker connected in series. Normally, the direct current flows through the mechanical switch. When interrupting the direct current, the vacuum circuit breaker is made nonconductive to allow the direct current to be commutated to the semiconductor switch, and subsequently the gas disconnector and the semiconductor switch are made nonconductive. A vacuum circuit breaker having a low withstand voltage can be used.