Abstract: A direct current (DC) power combiner operable to interconnect multiple interconnected photovoltaic strings is disclosed. The DC power combiner may include a device adapted for disconnecting at least one photovoltaic string from the multiple interconnected photovoltaic strings, each photovoltaic string connectible by a first and second DC power line. The device may include a differential current sensor adapted to measure differential current by comparing respective currents in the first and second DC power lines. A first switch is connected in series with the first DC power line. A control module is operatively attached to the differential current sensor and the first switch. The control module may be operable to open the first switch when the differential current sensor measures the differential current to be greater than a maximum allowed current differential, thereby disconnecting the photovoltaic string from the interconnected photovoltaic strings.

Abstract: Mobile medical clinic vehicles are disclosed. An enclosure is connected to a chassis and accommodates medical equipment items for patients and healthcare providers to utilize. One or more electrical components receive electrical power output from a generator, when operated, and provide a first output at a first voltage to a first subset of the medical equipment items and a second output at a second voltage to a second subset of the medical equipment items.

Abstract: A riding lawn mower comprising, a pair of rear drive wheels, a pair of front wheels, a deck positioned between the pair of front wheels and the pair of rear drive wheels, a rotatable cutting blade, and multiple battery packs removably coupled to the riding lawn mower and structured to provide power to the riding lawn mower, each battery pack graspable and removable by a user, wherein the multiple battery packs sequentially provide power to the riding lawn mower.

Abstract: An on-board charging (OBC) device for an electric vehicle includes a mains input including a power factor correction (PFC) converter, a mains-side direct current-to-alternating current (DC/AC) converter, a transformer having a mains-side coil and a battery-side coil, a battery-side alternating current-to-direct current (AC/DC) converter, a battery connector and one or more bypass switches configured to galvanically connecting the mains-side converter to the battery-side converter when closed. The transformer is configured to be magnetically coupled to a transmitter (TX) pad of an external wireless power transmitter (WPT), such that power is received by the mains-side coil and the battery side coil. When the bypass switches are closed, and the transformer is magnetically coupled to a WPT, power is sent to the battery connector through both the battery-side converter and the mains-side converter.

Abstract: The present disclosure provides a photovoltaic (PV) disconnect device used in an electrical system. The PV disconnect device includes a relay component electrically coupled to a feed circuit of a backup PV power generation system and a connector port electrically coupled to an energy control system. The PV disconnect device includes a sensor circuit to measure at least one of a voltage, a current, and a current frequency of the feed circuit of the backup PV power generation system. The PV disconnect device includes a controller operatively coupled to the relay component, the sensor circuit, and the connector port. The controller receives and processes the voltage, the current, and the current frequency measurements. The controller selectively actuates the relay component based on the processed voltage, current, and current frequency measurements.

Abstract: A power source system includes a plurality of output circuits electrically connected to a plurality of second coils on a second side of a transformer unit, and a selection circuit to which power is supplied from the plurality of output circuits. Each of the plurality of output circuits is electrically connected to each of the plurality of second coils on the second side, and outputs DC power to the selection circuit based on AC power of the second coil on the second side. The selection circuit selects a supply destination of the power from a first conductive path and a second conductive path.

Abstract: Systems, methods, and articles for a portable power case are disclosed. The portable power case is comprised of at least one battery and at least one PCB. The portable power case has at least two access ports and at least one USB port. The portable power case is operable to supply power to an amplifier, a radio, a wearable battery, a mobile phone, and a tablet. The portable power case is operable to be charged using solar panels, vehicle batteries, AC adapters, non-rechargeable batteries, and generators. The portable power case provides for modularity that allows the user to disassemble and selectively remove the batteries installed within the portable power case housing.

Abstract: Generally disclosed herein is a power system architecture for controlling self-healing operations for N number of feeder units. The power system architecture may restore power automatically to all feeder units when a loss of power occurs by reconfiguring the status of feeder unit breakers. The power system architecture may also reconfigure and restore power automatically by opening and closing feeder unit breakers when a loss of source returns. The power system architecture may further reconfigure and restore power automatically for as many feeder units as possible under abnormal conditions such as fault scenarios, breaker failures, operation failures, and relay failures.

Abstract: A reserve power supply system for providing a supplemental source of electrical power to a main power source. The system includes a backup battery and a switch that can be controlled to couple the backup battery to the main power source when reserve power is needed. The system also includes a sensor to detect when the backup battery should be engaged and a system control unit.

Abstract: The present disclosure discloses a distributed capacitance energy absorption verification device, which belongs to the field of direct-current high-voltage surge suppression. The distributed capacitance energy absorption verification device mainly includes a direct-current high-voltage generator, a high-voltage switch, a high-voltage capacitor bank, an isolation transformer, an energy absorption device, a high-voltage sphere gap short-circuit switch and other components. The high-voltage capacitor bank is used for simulating a distributed capacitance, and the high-voltage sphere gap short-circuit switch is used for simulating a short-circuit fault of a direct-current high-voltage system, thereby implementing performance verification of the energy absorption device.

Abstract: A wireless power transmitter including a power conversion unit configured to transmit wireless power generated based on magnetic coupling in a power transfer phase and a control unit configured to receive, from the wireless power receiver operating at a first operating point, a first received power packet of the first operating point and a second received power packet of the first operating point based on the first received power packet of the first operating point and the second received power packet of the first operating point and configured to receive a first received power packet of the second operating point and a second received power packet of the second operating point related to power calibration and construct a second power calibration curve based on the first received power packet of the second operating point and the second received power packet of the second operating point.

Abstract: A power control device for controlling a power supply system, the power control device including a DCDC converter for supplying power of a battery to a load, and an alternator connected in parallel with a DCDC converter for supplying generated power to the load, the power control device including: a monitoring unit for monitoring a current output from DCDC converter to the load; and a control unit for controlling an operation of DCDC converter and the alternator, wherein the control unit controls the alternator to generate electric power when an output current of DCDC converter monitored by the monitoring unit is equal to or greater than a first threshold value, and controls the alternator not to generate electric power when an output current of DCDC converter monitored by the monitoring unit is equal to or less than a second threshold value, which is smaller than the first threshold value.

Abstract: A radio frequency to direct current (RF-DC) converter for harvesting radio frequency energy includes an antenna circuit, and a plurality of cross-coupled differential-drive (CCDD) rectifier stage. The antenna circuit receives RF signals and outputs a positive signal at a positive RF terminal and outputs a negative signal output at a negative RF terminal. Each CCDD rectifier stage includes a first NMOS transistor, a first PMOS transistor, a second NMOS transistor and a second PMOS transistor. Each CCDD rectifier stage further includes two flying capacitors and two body capacitors. An input terminal is connected to a connection point between a source terminal of the first NMOS transistor and a source terminal of the second NMOS transistor. An output terminal is connected to a connection point between a source terminal of the first PMOS transistor and a source terminal of the second PMOS transistor.

Abstract: Systems, methods, and devices for wireless communication that support mechanisms for signaling resources available for energy harvesting (EH) to a UE in a wireless communication system. In aspects, a base station transmits an indication to an UE of resources (e.g., time and/or frequency resources) available to the UE for EH. The resources may include resources over which uplink transmissions are transmitted from one or more UEs and/or resources over which downlink transmission are transmitted from the base station to the one or more UEs. The base station may include additional information in the indication to the UE. In aspects, the indication from the base station to the UE of the resources available for EH and/or the additional information may enable the EH UE to more efficiently harvest energy from the uplink transmissions from neighboring UEs and/or downlink transmissions from the base station.

Abstract: A process automation system includes a central controller, a four-conductor, multi-drop bus, 1 to 16 1-5 V field devices, and 1 to 16 coupler boxes, each coupler box connecting a respective field device with the bus. The central controller includes a dual-tone, multiple-frequency (DTMF) encoder and each coupler box includes a DTMF decoder. Each coupler box isolates its associated field device's 1-5 V signal from the bus unless the coupler box is addressed by the central controller via a DTMF signal.

Abstract: Aspects of the disclosure include a system comprising at least one energy-storage-device connection, a first output connection to be coupled to a main power source providing main power, a second output connection to be coupled to at least one load, a first and second power converter coupled to the at least one energy-storage-device connection, and at least one controller coupled to the power converters and being configured to control the system to connect the power converters to the output connections, control the system to disconnect the first power converter from the second output connection responsive to detecting a fault in the main power, control the first power converter to provide power to the first output connection responsive to detecting the fault in the main power, and control the system to disconnect the second power converter from the first output connection responsive to detecting the fault in the main power.

Abstract: Systems and methods for adaptive power converters are provided. In one embodiment, an adaptive power converter comprises: a power converter controller; a switching power conversion circuit comprising an input switch, a low-pass filter, and a non-linear control feedback compensator, the input switch controlled using feedback control from the non-linear control feedback compensator, wherein the non-linear control feedback compensator controls the input switch to regulate an output from the power conversion circuit based on multiple regulation profiles; a measurement estimate and gain module; and a power converter state detection and correction function. The measurement estimate and gain module evaluates power converter state information from the power converter state detection and correction function.

Abstract: Current imbalance may be detected and components reactively moved to correct the current imbalance. The components, such as rectifiers, machines, etc., may be moved from the most loaded phase to the least loaded phase. The imbalance may be detected at one or more power distribution units. Rebalancing may be performed using a model which preserves the number of components per rack, while limiting per-rack phase imbalance and minimizing imbalance among phases. Once the rebalancing has been computed, instructions for moving components according to the rebalancing may be generated.

Abstract: A system for wireless power reception, preferably including one or more: antennas, dynamic impedance matches, RF-DC converters, DC impedance converters, and/or DC power outputs. A method for wireless power reception, preferably including: receiving power wirelessly at an antenna, dynamically adjusting an input impedance of a dynamic impedance match coupled to the antenna, and/or delivering the power to a load.

Abstract: A power supply device for controlling power supply from a power supply source to loads, comprising: a power storage element; a first circuit that connects the power supply source and the power storage element so as to be chargeable; a second circuit that connects the power storage element and the loads so as to be dischargeable; a third circuit that connects the power supply source and the loads so as to be able to supply power; and a control unit that controls the first circuit so as to charge the power storage element with the power of the power supply source when a predetermined signal is detected, and controls the third circuit so as to supply the power of the power supply source to the loads.