Abstract: An electric vehicle (EV) charging system includes a plurality of electrical vehicle supply equipment (EVSE) units, a plurality of associated EV charging stations, electrical power distribution wires or cables for distributing electrical power from the plurality of EVSE units to the plurality of EV charging stations, and an EVSE communications bus. Each EVSE unit includes a microcontroller unit (MCU) and a solid-state switch that control whether electrical current is able to flow to an associated EV charging station and connected plug-in EV (PEV) load. The MCUs communicate over the EVSE communications bus and, as PEVs charge, plug into, and unplug from the plurality of EV charging stations, reallocate or reapportion an available supply current among the plurality of EVSE units while also dynamically adjusting one or more circuit protection attributes also provided by the EVSE units.

Abstract: An arrangement is for compensating voltage drops in a power supply network. The arrangement includes at least one first converter system and a second converter system. The intermediate circuits thereof are coupled, and the first converter system is connected to a first distribution and the second converter system is connected to a second distribution.

Abstract: A contactor control system includes a switching member, a high voltage load, a high voltage energy storage, a bi-directional DC/DC-converter operatively connected to the switching member, a high-voltage capacitor operatively connected to the high-voltage load, and a low voltage energy storage operatively connected to the bi-directional DC/DC-converter, wherein the switching member is adapted to connect and disconnect the high voltage energy storage to and from the high voltage load, where the bi-directional DC/DC-converter is adapted to pre-charge the high-voltage capacitor to a predefined voltage value from the low voltage energy storage before the switching member is closed and adapted to discharge the high-voltage capacitor to the low voltage energy storage when the switching member has been opened. The advantage of the invention is that a DC-link capacitor can be charged from and discharged to a low voltage battery by using a bi-directional DC/DC-converter. Energy losses can thus be minimized.

Abstract: The present disclosure relates to a power converter for use in a host vehicle. The power converter comprises a DC link, a DC link capacitor, and a pre-charge circuit configured to charge the DC link capacitor. The pre-charge circuit comprises a boost converter comprising a switch and inductor coupling terminals configured to couple to an inductive component external to the power converter.

Abstract: A load control system may include multiple control devices that may send load control messages to load control devices for controlling an amount of power provided electrical loads. To prevent collision of the load control messages, the load control messages may be transmitted using different wireless communication channels. Each wireless communication channel may be assigned to a load control group that may include control devices and load control devices capable of communicating with one another on the assigned channel. A control device may send load control messages to a load control device within a transmission frame allocated for transmitting load control messages. The transmission frame may include equal sub-frames and load control messages may be sent at a random time within each sub-frame. Control devices may detect a status event within a sampling interval to offset transmissions from multiple control devices based on detection of the same event.

Abstract: A power control system includes a battery system and a DC-DC converter with first, second, third, and fourth power switches. A second terminal of the first power switch is connected to a first terminal of the second power switch. A second terminal of the third power switch is connected to a first terminal of the fourth power switch. A first inductor includes a first terminal connected to the second terminal of the first power switch and the first terminal of the second power switch and a second terminal connected to the second terminal of the third power switch and the first terminal of the fourth power switch. A first bypass switch is connected in parallel to the first power switch. A second bypass switch is connected in parallel to the third power switch.

Abstract: A vehicle, a vehicle electronics power assembly, and a method for providing and cooling an inductor assembly are provided. The vehicle has provided with a vehicle electrical system with a variable voltage converter (VVC) and an inductor assembly with a core and a winding. A housing is provided with a first housing member and a second housing member. The first and second housing members cooperate to encapsulate the winding and at least a portion of the core of the inductor assembly. The first housing member defines a first inlet and a first outlet, and the second housing member defines a second inlet and a second outlet. A fluid system is connected to the first inlet, the second inlet, the first outlet, and the second outlet to provide pressurized fluid to the first and second inlets to circulate fluid through the housing.

Abstract: A hybrid energy storage system for an elevator car includes a converter disposed on the elevator car and receives power from a power source and provides a first DC voltage to a first DC bus and a second DC voltage to a second DC bus, a first energy storage device connected to the converter receives the first DC voltage on the first DC bus, and a second energy storage device connected to the converter receives the second DC voltage on the second DC bus. The system also includes a first load connected to the first DC bus and a second DC bus, and a second load connected to the second DC bus. Power is provided from the first energy storage device to the first load under a first selected condition and power is supplied from the second energy storage device to the first load under second selected condition.

Abstract: A DC power distribution system includes: a transformer; a rectification device; a DC bus through which DC power flows; a plurality of DC branch lines branching off from the DC bus; an AC interrupting portion connected to an input side of the transformer; a first DC interrupting portion connected between the rectification device and the DC bus; and a plurality of second DC interrupting portions respectively provided to the plurality of DC branch lines. An interrupting-operation time for each second DC interrupting portion is set to be shorter than interrupting-operation times for the AC interrupting portion and the first DC interrupting portion. An inductance value of a short-circuit impedance of the transformer is set to a value at which short-circuit current can be limited to take a value not larger than a maximum current value permitted for the rectification device.

Abstract: An electrical system can include a power supply configured to provide electrical power to components at a time at which the electrical system experiences an electrical fault. The electrical system can include a first battery electrically coupled in parallel to a second battery via an electrical bus, whereby the first and second batteries can provide electrical power to a first electrical load and a second electrical load. Upon experiencing a fault, a first circuit element can electrically decouple the first battery and the second battery by opening a circuit provided by the electrical bus, thereby isolating the first battery from the second battery. Next, the battery experiencing the fault can include a second circuit element that can electrically decouple the battery experiencing the fault from a respective electrical load, while the battery isolated from the fault can continue to provide electrical power to components.

Abstract: In general, one aspect disclosed features a battery system for a vehicle, the battery system comprising: multiple battery modules, wherein each battery module comprises one or more battery cells, and wherein each battery module comprises an exhaust port; and one or more structural members mechanically coupled to the multiple battery modules; wherein the one or more structural members and the multiple battery modules define an exhaust chamber; wherein the exhaust chamber is in fluid communication with the exhaust ports of the multiple battery modules; wherein the one or more structural members comprise an outlet port in fluid communication with the exhaust chamber and an exterior of the exhaust chamber.

Abstract: A counter-solar power plant may include a controller configured to execute instructions stored in a memory, the instructions including operations to receive data associated with power outputs of a plurality of legacy solar-only resources (LSORs), determine an estimated power output of the plurality of LSORs based on the received data, obtain a target power delivery profile of the plurality of LSORs, the target power delivery profile including a plurality of target power outputs, determine an output of a CSPP renewable energy system (RES) and a charge/discharge of a CSPP energy storage system (ESS) such that a combined output of the CSPP and the estimated power output of the plurality of LSORs satisfies at least one of the plurality of target power outputs of the target power delivery profile, and control the CSPP RES and CSPP ESS according to the determined CSPP RES output and CSPP ESS charge/discharge.

Abstract: A shield for redirecting magnetic field generated from a plurality of transmitter coils includes a ferromagnetic structure divided into segments by a plurality of boundary regions, each segment comprises a first material having a first magnetic permeability and each boundary region comprises a second material having a second magnetic permeability lower than the first magnetic permeability, where the plurality of boundary regions are configured to resist a propagation of magnetic field from a first area of the ferromagnetic structure to a second area of the ferromagnetic structure, where the first area intercepts the magnetic field generated from at least one active transmitter coil of the plurality of transmitter coils.

Abstract: A method for starting a photovoltaic rapid shutdown system, an application apparatus and a system are provided. In this method, the inverter system controls a voltage of a direct current bus in the photovoltaic rapid shutdown system. The photovoltaic module breaker makes determination based on a detected output voltage of the photovoltaic module breaker. In a case that the change characteristics of the voltage of the direct current bus connected to the photovoltaic module breaker meets the predetermined turn-on condition, the photovoltaic module breaker controls itself to be turned on. Therefore, the photovoltaic module breaker can determine whether the photovoltaic module breaker receives a turn-on signal only based on its own voltage acquisition device without an additional receiving apparatus.

Abstract: This application provides a charging system and an electric vehicle. The charging system mainly includes an MCU and a motor. N bridge arms in the MCU and N motor windings in the motor are multiplexed to constitute a voltage conversion circuit. When a power supply voltage is less than a minimum charging voltage of a power battery, the MCU may perform boost conversion on the power supply voltage by using the voltage conversion circuit, and output the power supply voltage obtained after boost conversion to the power battery as a first output voltage, where the first output voltage is not less than the minimum charging voltage. In this application, space occupied by the charging system and costs of the charging system can be reduced while the charging system is used to perform boost conversion on the power supply voltage.

Abstract: A method and a device for controlling the active discharge of a high-voltage intermediate circuit via a discharge resistor.

Abstract: A configurable electrical architecture for an eVTOL aircraft having a takeoff and landing power mode and a cruise power mode. The configurable electrical architecture includes a power-optimized power source including a high-power battery array and an energy-optimized power source selected from a plurality of interchangeable energy-optimized power sources including a high-energy battery array, a hydrogen fuel cell system and a turbo-generator system. A distribution system is electrically coupled to the power-optimized power source and the energy-optimized power source. At least one electric motor is electrically coupled to the distribution system. In the takeoff and landing power mode, both the power-optimized power source and the energy-optimized power source provide electrical power to the at least one electric motor.

Abstract: UAV tether systems are provided that reliably deploy and retract cables capable of high-power and high-bandwidth data transmission. The tether system spools cables in a single layer to promote heat dissipation thereby allowing the use of lower-diameter cables. The tether systems further utilize a lightweight converter that achieves a high-voltage power transmission across a cable that is stepped down to a plurality of lower-voltage outputs usable by a UAV and accompanying payloads. The converter is constructed in a manner that promotes heat dissipation through the use of multi-layer PCBs and separate power modules PCBs mounted above main PCBs to create a cavity where forced air can reach heat sinks affixed to the power modules that extend into the cavity.

Abstract: In a method for adjusting a device voltage of a power storage device, when this device is represented as an equivalent circuit in which a parallel circuit of a capacitive device component and a short-circuit resistance indicating a magnitude of self-discharge of the device component is connected in series with a DC resistance of the power storage device, the power storage device has a property that, while the power storage device is pressed under a load and the device component is charged to generate a component voltage, the component voltage lowers when the load is reduced, but rises when the load is increased. The method includes a) component-voltage changing by load change of changing the load applied to the power storage device under a first load, generating a first component voltage in the device component, from the first load to change the component voltage from the first component voltage.

Abstract: A power source apparatus includes a plurality of first power sources, each connected to a load through a power supply line, and at least one second power source, which is a sub power source to be used when the first power source is unable to output a predetermined voltage. The second power source is connected in parallel to the power supply line of at least one of the first power source through a diode. The second power source is provided on an anode side of the diode, the load is configured to operate at a voltage equal to or more than a first voltage, the first power source outputs a second voltage higher than the first voltage, the second power source outputs a third voltage, which is higher than the first voltage, the voltage output through the diode from the second power source being lower than the second voltage.