Abstract: A dual-source facility power system includes a first electrical interface configured to receive DC power from at least one photovoltaic panel; a second electrical interface configured to receive AC power from an electric utility grid; a third electrical interface configured to deliver AC power to one or more branch circuits or appliances; and a controller. The controller is configured to monitor characteristics of AC power received from the electric utility grid. When one or more such characteristics fail to meet one or more predetermined specifications, the controller is further configured to disconnect the second electrical interface; deliver, to one or more branch circuits or appliances, AC power derived from DC power received from the at least one photovoltaic panel; and individually monitor AC current delivered to one or more of the branch circuits or appliances.

Abstract: A power conversion apparatus includes a hermetic housing, a power semiconductor module, and dry gas. The hermetic housing includes a gas inlet valve and a gas outlet valve. The power semiconductor module is arranged in an internal space in the hermetic housing. The internal space in the hermetic housing is filled with dry gas.

Abstract: Electric vehicle supply equipment includes at least first and second connectors, and a controller. The controller, responsive to detecting the first and second connectors are engaged with first and second vehicles respectively, synchronizes electric power from the first and second vehicles and supplies the electric power to an entity other than the first and second vehicles.

Abstract: A rapid shutdown system and a method for controlling the rapid shutdown system are provided. A disturbance is applied to a direct-current side of an inverter in the rapid shutdown system only when the inverter does not meet a starting condition, i.e., before the inverter starts. Once meeting the starting condition, the inverter normally operates. A shutdown device in the rapid shutdown system determines its state by determining whether the electrical signal at its output end meets the preset condition, and switches itself on or off in response to its determination.

Abstract: A power reception device includes: a power reception coil that receives power transmitted from a power transmission coil in a non-contact manner; and a control device that executes a short-circuit mode in which a plurality of switching elements provided between the power reception coil and a load are caused to perform switching operations to short-circuit between output terminals of the power reception coil. Further, when a phase of a current and a phase of a voltage in the power reception device are deviated from each other, the control device sets switching timings of the switching elements to the short-circuit mode in a manner that the phase of the voltage is shifted in a direction in which a power factor of power supplied to the load is deteriorated.

Abstract: A battery assembly including a housing sized to be replaceably installed within a battery assembly compartment of an electric vehicle. Where a plurality of battery modules are disposed within the housing. The battery assembly includes a battery module charging assembly electrically coupled with a negative module terminal and a positive module terminal of each of the plurality of battery modules and disposed within the battery assembly housing. The battery module charging assembly includes a power supply plug configured to deliver electrical energy from the plurality of battery modules to the electric vehicle, a power charging port configured to be coupled with and receive electrical energy from a power source for charging the plurality of battery modules. The charging assembly further includes control circuitry configured to control charging operations of the battery assembly and a switch configured to connect the plurality of battery modules in parallel or series.

Abstract: A multiple energy source management system for an integrated hydrogen-electric engine is disclosed, the system includes a first and a second energy source providing energy to the integrated hydrogen-electric engine. A pre-charge load to provide an energy demand to a selected energy source. A sensor monitoring a power output from the first and/or second energy source. A relay to switch between the first and second energy sources. A computer system to receive an output energy of the first energy source, determine if the output energy is below a threshold value, switch the relay from the first state to the third state for a predetermined period of time, based on the determination, pre-charge the second energy source by the pre-charge load; and switch the relay to the second state after the predetermined period of time.

Abstract: A power transmitting apparatus measures a Q factor of a power transmitting unit that performs wireless power transfer to a power receiving apparatus, and determines presence/absence of an object different from the power receiving apparatus based on the Q factor. The power transmitting apparatus obtains a first index value regarding a predetermined physical amount different from the Q factor after measurement of the Q factor, obtains a second index value regarding the predetermined physical amount before wireless power transfer to the power receiving apparatus starts after the it is determined in the above determination that an object different from the power receiving apparatus does not exist; and determines presence/absence of an object different from the power receiving apparatus based on the first index value and the second index value.

Abstract: An example system includes a motor/generator selectively coupled to a drive line of a vehicle, and configured to selectively modulate power transfer between an electrical load and the drive line; a battery pack; a DC/DC converter electrically interposed between the motor/generator and the electrical load, and between the battery pack and the electrical load; a covering tray positioned over a plurality of batteries of the battery pack, the covering tray comprising a connectivity layer that has a charging circuit allowing each of the plurality of batteries to be discharged individually; a plurality of battery microcontrollers, each of the plurality of battery microcontrollers associated with a corresponding one of a plurality of batteries of the battery pack; and a primary DC/DC controller configured to command operations of the DC/DC converter; wherein the plurality of battery microcontrollers are operationally coupled to the primary DC/DC controller.

Abstract: The present invention relates to an apparatus and method for extending solar photovoltaic system's strings size and stabilizing their DC-Bus voltage at any desired constant level up to the maximum level permitted by the local electric code (LEC), This will maximize the energy production of a multi module solar string power generation system, comprising; an Injection Circuit (IC), connected to a DC-Bus and to a primary substring of solar panels, wherein the IC is also connected to an extension substring with at least one solar panel. The IC lifts up and regulates the voltage of the connected primary substring and the extension substring to a desired stabilized constant level at the input of the solar inverter.

Abstract: This application relates to the field of communications technologies, and discloses a backup power supply control method, to obtain target power supplying duration of a battery, and determine average power consumption of a communication station (101) within a time period corresponding to the target power supplying duration. Further, a state of charge of the battery is obtained, and actual power supplying duration for the battery to supply power to the communication station (101) is determined based on the state of charge of the battery and the average power consumption. Therefore, an operation mode of a communication device in the communication station (101) may be adjusted, to reduce the average power consumption of the communication station (101) within the time period corresponding to the target power supplying duration.

Abstract: A battery swapping station includes an emergency power generation function capable of, when the supply of power to a battery swapping station (BSS) for charging a swappable battery is interrupted due to power failure or system error, enabling the BSS system to be operated without interruption.

Abstract: An electrically-driven fracturing system, which includes a main power generation device, a first auxiliary power generation device, a switch device, and an electrically-driven fracturing device; the electrically-driven fracturing device includes a fracturing motor and a fracturing auxiliary device; a rated generation power of the main power generation device is greater than that of the first auxiliary power generation device, a rated output voltage of the main power generation device is greater than that of the first auxiliary power generation device, the input end of the high-voltage switch group is connected to the main power generation device, the output end of the high-voltage switch group is connected to the fracturing motor, the input end of the low-voltage switch group is connected to the first auxiliary power generation device, and the output end of the low-voltage switch group is connected to the fracturing auxiliary device.

Abstract: A method and system of controlling a single load by one of two available power sources. More particularly, the wiring and use of a relay to control a power feed to a packaged terminal unit, that provides both heating and cooling to an individual housing unit, from one of two power sources based upon a heating or cooling thermostat mode of operation. The relay is wired and configured so that when the thermostat is in one mode of operation, a primary side of the relay is open, or not complete, the normally-closed contacts are energized, and the packaged terminal unit is powered by one of the first and the second power source; and when the thermostat is in a second mode of operation, the primary side of the relay is triggered, the normally-open contacts are energized, and the packaged terminal unit ingle is powered by the other power source.

Abstract: An uninterruptible power supply includes an input configured to be coupled to a renewable power source and an energy storage component configured to receive and store energy and to provide stored power. Power circuitry is configured to receive the renewable power and the stored power and provide output power to a load. A controller coupled to the power circuitry determines whether an amount of available renewable power exceeds the output power level provided to the load and, if so, provides excess power from the renewable power to the stored energy component.

Abstract: An electrical energy storage system for an aircraft, comprising at least one electrical energy storage unit with power supply lines and an energy source that is configured to store electrical energy and to supply electrical power at a predetermined voltage range via the power supply lines, wherein the at least one electrical energy storage unit comprises a power switching unit that is adapted to operate in an associated supply mode for supplying electrical power from the energy source via the power supply lines, and to operate in an associated disconnect mode for disconnecting the energy source from the power supply lines.

Abstract: Described herein are devices, systems, and methods for wireless power transfer utilizing a midfield source and implant. In one variation, a midfield source may be realized by a patterned metal plate composed of one of more subwavelength structures. These midfield sources may manipulate evanescent fields outside a material (e.g., tissue) to excite and control propagating fields inside the material (e.g., tissue) and thereby generate spatially confined and adaptive energy transport in the material (e.g., tissue). The energy may be received by an implanted device, which may be configured for one or more functions such as stimulation, sensing, or drug delivery.

Abstract: A high frequency, high efficiency, near field wireless charging system and interface for battery-powered wearable devices are provided. A number of various magnetic core, multi-winding transmitter coil, receiver coil configurations may be used with the transmitter coils generating a charge voltage at the receiver coils through magnetic flux. In some configurations, a buck-boost assisted transmitter, or a buck-boost split between transmitter and receiver charging system may be used. In other configurations, a switch-cap boost block on the transmitter side may be used to increase efficiency. In yet other configurations, a dual path charging system (e.g., for smart glass temples) or a dual transmitter—single receiver charging system with buck-boost or switch-cap blocks may be used. The transmitter-receiver pair configurations may also be used to charge a battery module to be inserted into a wearable device.

Abstract: The present invention relates to a system for electrical energy storage. More specifically, the system comprises an energy storage retrofitted to an existing photovoltaic system. The present invention further relates to a method for control such a system for electrical energy storage.

Abstract: Provided is a power transmission device that has a simple structure and suppresses magnetic field leakage from a power transmission coil while suppressing excessive increase in the outer shape and the weight of the power transmission device. A power transmission device 1 includes: a power transmission portion 2 including a power transmission coil 20 and a housing 3 made of metal and having a peripheral wall 30 surrounding the power transmission portion 2. A shielding portion 5 protruding inward of the peripheral wall 30 is integrated with, of the peripheral wall 30, a top end 30t located on a power reception coil 90 placement side.