Abstract: An apparatus in which electric power is generated for an electrical load from differentials in electric field strengths within a vicinity of powerlines includes: a plurality of electrodes separated and electrically insulated from one another for enabling differentials in voltage resulting from differentials in electric field strength experienced there at; and electrical components electrically connected therewith and configurable to establish one or more electric circuits whereby voltage differentials cause a current to flow through the established electric circuit for powering the electrical load.

Abstract: A vehicle power supply system mounted on a vehicle is provided. The vehicle power supply system includes a main battery, a power converting apparatus configured to convert DC power of the main battery into AC power, a switch configured to switch a state between energization and cutoff between the main battery and the power converting apparatus, a first DC-DC converter connected to a power supply wiring between the switch and the power converting apparatus, and a second DC-DC converter connected to a power supply wiring between the switch and the main battery. The first DC-DC converter and the second DC-DC converter are mounted at positions distant from each other in the vehicle.

Abstract: In some examples, an apparatus is to adjust charge termination voltage. The apparatus includes a controller to adjust a charge termination voltage of a charger of a rechargeable energy storage device based on a comparison of a first threshold level with the voltage of the rechargeable energy storage device during peak load. The charge termination voltage is a voltage at which the rechargeable energy storage device has capacity to support peak load of a system. The controller is to adjust the charge termination voltage based on a comparison of a second threshold level with an end voltage of the rechargeable energy storage device after peak load.

Abstract: An improved “3-in-1” BESS that performs three functions: (1) improving the transient stability in a hybrid AC/DC microgrid (HMG) system during any fault; (2) improving power quality in the HMG during any sudden load change; and (3) mitigating power and frequency fluctuations due to variations in wind speed and solar irradiance in the HMG. The same control and structural design is used for all three functions, and the improved BESS thus is adaptive to the changing operating situations within the HMG, and eliminates the requirement for a number of higher cost auxiliary control devices. The control structure of the improved BESS is simple, so it is easier and cheaper to manufacture, and can be easily implemented in practice, and retro-fit into existing HMGs.

Abstract: An objective of the present invention is to provide a power supply system which enables stabilization of power supply voltages of multiple areas and/or redundancy to be achieved with low costs. A power supply system includes a main battery for providing power and a sub-battery which is separate from the main battery and provides power. The power supply system further includes switching boxes in first to fourth areas as a plurality of power supply areas configured to be supplied with power from the main battery and sub-battery, the switching boxes switching on/off states of power supplies into the first to fourth areas from the main battery and from the sub-battery. Furthermore, the power supply system includes a control section for switching control of the on/off states for the switching boxes.

Abstract: An active-clamped isolated SEPIC DC-DC power converter (ACISC) to convert a DC voltage to supply a variety of DC loads. The single-ended primary-inductor converter (SEPIC) of the ACISC may be configured to perform both buck and boost converter functions. The ACISC of this disclosure may be configured to operate over a wide input voltage range to provide an output voltage for DC electronic loads supplied by the power converter. In the example of an automobile, a back-up twelve volt battery may output voltages to the ACISC over a wide voltage range, e.g., nine volts to eighteen volts. The wide input voltage range of the ACISC may be desirable when used as the converter for a back-up battery supply. The circuitry arrangement and component selection of the ACISC of this disclosure cause the power converter to operate in resonant DCM mode in the megahertz (MHz) frequency range.

Abstract: A power generating system comprised of a hydrogen fuel cell and rechargeable battery connected together in series to be used as a load following system without the use of a DC-DC converter. The hydrogen fuel cell's cathode air compressor is driven off of the output of this power generation system. This is made possible by the following innovations: A novel way to wire the systems in series with the use of switches and bypass diodes, a method to limit the system output voltage so that we do not exceed the maximum voltage of downstream components, and an isolated DC-DC converter to charge the rechargeable battery with the hydrogen fuel cell.

Abstract: An electrified vehicle and associated inverter configured for powering two different types of external loads include first and second phase/line legs combined with a first neutral leg coupled to a vehicle chassis, and a second floating neutral leg that is not coupled to the vehicle chassis. The first/second phase legs and first neutral leg are coupled to a first receptacle configured to receive a corresponding plug to power a first load, such as a power tool or accessory. The first/second phase legs and the second neutral leg are coupled to a second receptacle configured to receive a corresponding plug to power a second load, such as a home or building having an earth grounding electrode. The inverter may include an isolation transformer between the loads and the traction battery, and/or may be configured to provide single phase, split-phase, or three-phase power for either or both of the neutral connections.

Abstract: A method for automatically reducing the power consumed by devices from a power source having a limited amount of power. The method includes determining with a control system which of the devices is consuming the power. The method further includes identifying a candidate device among the devices to tentatively control to reduce the power consumed by the candidate device. The method further includes accessing a power control model, where the power control model includes pairings of the candidate device with complementary devices among the devices, and where the devices in each of the pairings consume the power in a related pattern. The method further includes controlling the candidate device to reduce the power consumed thereby only when each of the complementary devices in each of the pairings in the power control model are determined to be in a non-power consuming state.

Abstract: Systems and methods for power start up in a multi-unit power distribution network contemplate selectively disconnecting and reconnecting a remote subunit from a power conductor in a power distribution network at a relatively low frequency while providing short current pulses (at a low duty cycle) with enough energy transfer to power conditioning elements within the remote subunit during a start-up sequence. Once the power conditioning elements are properly charged, the remote subunit may change frequencies of the disconnecting and reconnecting so as to synchronize such disconnections to an expected frequency at the power source. Circuitry at the power source may measure activity on the power conductors regardless of frequency to detect an unwanted load on the power conductors (e.g., a human contacting the power conductors).

Abstract: A method for controlling a renewable energy generator, the renewable energy generator being connected to a Point of Interconnection of an external power grid by a connecting network, wherein the connecting network has an associated impedance level. The method comprising: monitoring at least one parameter of the connecting network and the voltage level at the Point of Interconnection; generating, during normal operating conditions, at least one current injection profile based upon the at least one measured parameter and a predetermined injection profile; and operating the renewable energy generator, during a grid fault, to output current according to the at least one current injection profile, so as to achieve a current set point at the Point of Interconnection.

Abstract: A convenient electronic circuit in which a switch is able to be switched through electric power obtained by weak radio waves is provided.

Abstract: A converter and a circuit device including the converter are disclosed. The converter includes an inductor including a first end and a second end, and a switching circuit connected to the inductor. The switching circuit includes a first switch to control a connection between the first end and a battery connected to the converter, a second switch to control a connection between the second end and a current output end configured to output a current generated through the inductor from the battery, a third switch to control a connection between the second end and a voltage output end configured to output a voltage generated from the battery, and a fourth switch to control a connection between the second end and a voltage input end configured to receive a voltage to charge the battery.

Abstract: A system includes at least one antenna and a controller. The controller is configured to identify a phase of a first signal received by the at least one antenna from a wireless device. The controller is configured to determine transmission settings for the at least one antenna based on the identified phase. The controller is configured to generate, according to the transmission settings, a second signal for focusing on a wireless device. A method includes identifying a phase of a first signal received by a first transceiver from a second transceiver. The method includes determining transmission settings for the first transceiver based on the identified phase. The method includes generating, according to the transmission settings, a second signal for focusing on the second transceiver. Embodiments improve the power efficiency of wireless signal transmission.

Abstract: A power transmission apparatus includes a first switching element having a first and a second terminal, a first capacitor connected between the first terminal and the second terminal of the first switching element, and a power transmission inductor connected to the first switching element on a direct-current (DC) basis and configured to wirelessly transmit alternating-current (AC) power.

Abstract: Safety power disconnection for remote power distribution in power distribution systems is disclosed. The power distribution system includes one or more power distribution circuits each configured to remotely distribute power from a power source over current carrying power conductors to remote units to provide power for remote unit operations. A remote unit is configured to decouple power from the power conductors thereby disconnecting the load of the remote unit from the power distribution system. A current measurement circuit in the power distribution system measures current flowing on the power conductors and provides a current measurement to the controller circuit. The controller circuit is configured to disconnect the power source from the power conductors for safety reasons in response to detecting a current from the power source in excess of a threshold current level indicating a load.

Abstract: Described herein are active rectification methods and systems for a rectifier of a wireless power system. Exemplary methods can include detecting, by a zero-crossing detector, one or more zero-crossings of a current at an input of the rectifier and determining a first delay time based on at least one wireless power system parameter and the zero-crossings. The methods can include generating first and second control signals for first and second switches of the rectifier, respectively, based on the first delay time; inserting a first dead time between the first control signal and the second control signal; and providing the first and second control signals to the first and second switches, respectively.

Abstract: An action timer start switch, a breech block with an integral action timer start switch and a system for measuring internal ballistic data in a test weapon system are described herein. The action timer start switch includes a through-hammer adjustable contact having a first contact element and a contact switch supported on the breech block having a second contact element. The first contact element is adjustable for contacting the second contact element when the hammer is a position to generating a primer strike. The first contact element may be set by simply positioning the breech block in the in-battery position with the hammer in the ignition position and moving the adjustable contact relative to the contact switch through the breech of the universal receiver.

Abstract: A wireless power feed system with high transfer efficiency of electric power is disclosed. The wireless power feed system includes a power feeding device and a power receiving device, wherein the power feeding device includes a first electromagnetic coupling coil that is connected to an AC power source via a directional coupler; a first resonant coil; a switch connected to the opposite ends of the first resonant coil; a control circuit which conducts switching on/off of the switch based on a parameter of an amplitude of a reflective wave detected by the directional coupler; and an analog-digital converter provided between the first electromagnetic coupling coil and the control circuit; and the power receiving device includes a second resonant coil; and a second electromagnetic coupling coil, and wherein the first electromagnetic coupling coil is provided between the first resonant coil and the second resonant coil.

Abstract: The disclosure provides a charging device and a method for positioning an electronic device. The method includes: in response to determining that a positioning request signal from an electronic device is received, enabling multiple antennas; controlling each antenna to receive a first radio frequency signal broadcast by the electronic device, and determining an arrival angle of the first radio frequency signal and a distance between the electronic device and the charging device based on the first radio frequency signal received by each antenna; and determining a relative position between the charging device and the electronic device based on the arrival angle and distance.