Abstract: Provided is a transmission coil which can inhibit reduction in transmission efficiency during underwater non-contact electric power transmission. A transmission coil configured to transmit electric power in water includes an annular electric wire through which an alternating current flows, and a first cover which includes non-conductive resin or non-magnetic resin and seals a periphery of the electric wire. The electric wire transmits the electric power via a magnetic field generated by flowing of the alternating current.

Abstract: A battery management device for preventing a battery from being damaged by a low voltage includes a storage configured to store a first protection voltage and a second protection voltage corresponding to a protection mode of the battery; a voltage detector configured to detect a voltage of the battery; a controller configured to confirm the detected voltage, to enter the protection mode when the detected voltage of the battery is the first protection voltage, to check a time point when the detected voltage of the battery is the second protection voltage, and to release the protection mode when a predetermined time elapses from the time point.

Abstract: A method and apparatus for power converter current control. In one embodiment, the method comprises controlling an instantaneous current generated by a power converter such that that power converter appears, from the perspective of an AC line coupled to the power converter, as a virtual AC voltage source in series with a virtual impedance.

Abstract: An electrical system includes a battery, sensors, and a controller. The sensors output measured signals indicative of an actual state of the battery, including respective actual voltage, current, and temperature signals for each battery cell. The controller, in conducting a method, generates an estimated state of the battery, including a predicted voltage of the battery, doing so responsive to the signals using an open-circuit voltage and an output of an empirical model. An operating state of the electrical system is controlled using the estimated state. The empirical model includes low-pass/band-pass filters and a high-pass filter each with a different time-constant, the time-constants being spread over a time-constant range. Each low-pass/band-pass filter branches through a basis function(s) whose output(s) are multiplied by a respective resistance value to generate higher-frequency voltage transients. The controller sums the open-circuit voltage and voltage transients to derive the predicted voltage.

Abstract: A circuit body for a vehicle is wired on a vehicle body of the vehicle for performing supply of electric power to an electrical component and communication of various communication signals with the electrical component. The circuit body includes: a plurality of control boxes separately disposed on the circuit body and capable of controlling input and output of at least one of the electric power and the communication signal; a trunk line harness connecting one of the plurality of control boxes and another of the plurality of control boxes; and a branch line harness connecting the control box and the electrical component. The trunk line harness includes a power line for transmitting electric power and a communication line for transmitting communication signals in a separated state. An end portion of the power line and an end portion of the communication line are connected to the control box.

Abstract: A power supply system includes a first circuit, a second circuit and a voltage controller. The first circuit includes a first power supply line connected to each of a first load, a power supply source, and a first battery. The second circuit includes a second power supply line connected to a second load and a second battery connected to the second power supply line. The voltage controller includes a DC-DC converter connected between the first power supply line and the second power supply line. The second load is able to perform a function that substitutes for at least part of a function that the first load performs. The voltage controller includes a converter control unit configured to control the DC-DC converter such that an output voltage higher than or equal to a voltage of the second battery is output to the second power supply line.

Abstract: An electronic circuit module is provided. The electronic circuit module prevents damage by efficiently detecting an overcurrent in the electronic circuit module using an SiC MOSFET. The electronic circuit module includes an input unit that is configured to input a reference voltage and a switching unit that is configured to output a first voltage based on a current flow. A converter is configured to output a second voltage based on the first voltage and the reference voltage. An output unit is configured to compare a magnitude of the reference voltage with a magnitude of the second voltage to output a feedback signal when the second voltage is greater than the reference voltage.

Abstract: A contactless charging apparatus and method for contactless charging are disclosed. In one embodiment of the contactless charging apparatus, a primary electromagnetic structure and a secondary electromagnetic structure are disposed in an opposing relationship with primary wedges of the primary electromagnetic structure facing secondary wedges of the secondary electromagnetic structure with a non-magnetic gap therebetween. Coils may be positioned in spaces defined by circumferentially slotted areas between the primary and the secondary concentric cores. A non-resonance circuit is formed between the primary electromagnetic structure and the secondary electromagnetic structure to provide a contactless electrical energy transmission from the primary electromagnetic structure to the secondary electromagnetic structure with the use of a time-varying electromagnetic field.

Abstract: A foreign object detection device includes a processor, a detecting circuit assembly connected to the processor, a coil connected to the detecting circuit assembly, a signal generator connected to the processor and the detecting circuit assembly, and a coil configuring circuit connected to the processor and the coil. The processor outputs a control signal to the coil configuring circuit so as to control the coil configuring circuit to generate a switch signal for enabling the coil to switch to one of a closed mode and an open mode, and controls the signal generator to transmit a test signal to the coil via the detecting circuit assembly when the coil is in the open mode.

Abstract: A method for performing building power management includes interfacing a power manager with an upstream controller to obtain a demand response event signal; receiving and parsing the demand response event signal; determining a power target based on a payload, and demand response begin and end times specified in the demand response event signal; evaluating whether an average power exceeds or falls below a limit; determining whether a shed action or a restore action is required; determining which variable and fixed electrical loads are to be maintained, shed or restored; interfacing the power manager with a building automation system (BAS); providing the BAS with a load control signal instructing that selected variable and fixed electrical loads are to be shed or restored; and selectively maintaining, shedding or restoring the selected variable and fixed electrical loads responsive to the load control signal.

Abstract: An electrically powered vehicle system including a battery, the terminals of which supply positive and negative power rails, and including a bulk capacitor located in series with a switching device, and being electrically connected between the power rails. A heater having a heating resistance is connected in series with a heater switch, and is electrically connected between the power rails. A link is electrically connected between a point between the bulk capacitor and the switching device to a point between heating resistance and the heater switch.

Abstract: The technology provides for a magnetic sensing device. The device includes a magnetic sensor configured to generate a first output triggered by a first polarity and a second output triggered by a second polarity. The device includes a first magnet, a second magnet, and a third magnet. The device may be configured such that, when the second magnet is not within a predetermined distance from the first magnet, a magnetic field from the first magnet having the first polarity causes the first output and the second output to have a first set of values. The device may be configured such that, when the second magnet is within the predetermined distance from the first magnet, a magnetic field from the third magnet having the second polarity causes the first output and the second output to have a second set of values.

Abstract: A DC power distribution system includes a plurality of power sources and a DC power distribution bus having a plurality of DC bus sections. At least one power source is coupled to each of the DC bus sections. One or more power switching assemblies couple one of the DC bus sections to another. The power switching assembly has first and second terminals, the first terminal being electrically coupled to a first bus section and the second terminal being electrically coupled to a second bus section. First and second semiconductor devices are electrically coupled between the first and second terminal to control current flow between the first terminal and the second terminal. At least one power switching assembly further includes a pair of current limiters coupled between the first and second semiconductor devices and an energy store is coupled to that power switching assembly between the pair of current limiters.

Abstract: A management device manages a second power storage device that reinforces a first power storage device for supplying electricity to loads in the vehicle. A power supply unit of the management device steps down a voltage supplied from the first power storage device. A control unit uses, as a power supply voltage, the voltage generated by the power supply unit and monitors the state of the second power storage device to control the charging and discharging of the second power storage device. A switch electrically connects or disconnects the second power storage device to or from the power supply unit. The switch is turned on when an ignition is in an on-state, and is turned off when the ignition is in an off-state.

Abstract: A single-control series resonance circuit, a wireless power supply transmitter, a switch circuit and a full-bridge transmitting circuit, wherein the single-control series resonance circuit comprises: a switching tube, a resonance transmitting coil and a resonance capacitor. One end of the resonance transmitting coil is connected to one end of the resonance capacitor, the other end of the resonance transmitting coil is connected to the positive pole of a power supply, and the other end of the resonance capacitor is grounded. A first end of the switching tube is connected to one end of the resonance capacitor, and a second end of the switching tube is connected to the other end of the resonance capacitor. The circuit of the single-control series resonance circuit is very simple, the costs are low, and the EMC characteristics are good.

Abstract: A multilevel inverter includes an inner DC source group circuit that generates a plurality of voltage levels, and an outer DC source group circuit that generates a substantially sinusoidal output voltage. The substantially sinusoidal output voltage is generated using, at least in part, the plurality of voltage levels generated by the inner DC source group circuit. An H-bridge circuit supplies the substantially sinusoidal output voltage at alternating polarities to a load.

Abstract: A wireless power transmission device for a vehicle is provided. The wireless power transmission device according to an exemplary embodiment of the present invention comprises: a wireless power transmission module comprising at least one flat coil for transmitting wireless power and a magnetic field shielding sheet arranged on one surface of the flat coil; a heat radiating case for radiating heat generated by a heat source, with the wireless power transmission module being coupled to one side thereof and at least one circuit board for driving the wireless power transmission module being embedded therein; a heat radiating coating layer applied to the outer surface of the heat radiating case; and a cover detachably coupled to the heat-radiating case. The wireless power transmission device for the vehicle described above may be installed or embedded within a vehicle for using in charging the main battery of a portable terminal.

Abstract: A wireless power transfer (“WPT”) pad apparatus includes a ferrite structure and four windings adjacent to the ferrite structure. A horizontal surface of the ferrite structure is adjacent to each of the four windings and each of the four windings are wound in a horizontal pattern that is planar to the horizontal surface. The four windings are arranged in a two-by-two square pattern in a north-south-north-south polarity arrangement.

Abstract: A multilevel inverter includes an inner DC source group circuit that generates a plurality of voltage levels, and an outer DC source group circuit that generates a substantially sinusoidal output voltage. The substantially sinusoidal output voltage is generated using, at least in part, the plurality of voltage levels generated by the inner DC source group circuit. An H-bridge circuit supplies the substantially sinusoidal output voltage at alternating polarities to a load.

Abstract: An arrangement (100) is disclosed, comprising an electrical pulse generating module (10) configured to generate at least one electrical pulse, and a transformer (20) electrically connected to the electrical pulse generating module (10). The electrical pulse generating module (10) comprises an electrical energy storage module (40) that can be charged or discharged, and a switch unit (50) controllably switchable between at least a conducting state and a non-conducting state. When the switch unit (50) is switched into the non-conducting state, a power supply (30) charges the electrical energy storage module (40) by way of a charging current. When the switch unit (50) is switched into the conducting state, the electrical energy storage module (40) is discharged to create an electrical pulse to be received by the transformer (20).