Abstract: A photovoltaic system, including: a plurality of photovoltaic panels having outputs connected in series as a string to provide a string output; a converter coupled to the string to receive the string output as an input and generate a direct current output from the input; a series connection of the string output and the direct current output; and a bus powered at least in part by the series connection of the string output and the direct current output.

Abstract: A power supply apparatus of a computerized tomography (CT) shelter system is provided. The power supply apparatus comprises a power source buffer unit and a generator. The power source buffer unit comprises a battery module and an inverter module. The battery module is used to store electric energy. The inverter module may convert low-level alternating-current power into direct-current power, which is then stored in the battery module, and may also convert the direct-current power stored in the battery module into high-level alternating-current power that is then supplied to a CT apparatus of the CT shelter system. The generator may generate the low-level alternating-current power that is then supplied to the inverter module, and the generator may also supply the generated low-level alternating-current power to an air conditioning apparatus of the CT shelter system.

Abstract: A power distribution system for a vehicle includes power grids including a first power grid having a first polarity and a second power grid having a second polarity opposite to the first polarity. Aggregators are coupled to the power sources and include a first low voltage grid and a second low voltage grid. At least one load is defined by the first low voltage grid and the second low voltage grid and includes one or more of a non-critical load and a critical load. A plurality of switches is coupled to the aggregators to define a load path for each of the plurality of loads. A controller is operably coupled to each of the power grids and the plurality of switches and is configured with a power distribution architecture that includes modes. Each mode is defined by selective operation of one or more of the plurality of switches.

Abstract: A wireless power transmission device for a vehicle and a method are provided. The wireless power transmission device for a vehicle may transmit a signal for detection of a wireless power reception device by using a lower frequency band that is different from an operating frequency band used to control the vehicle. The wireless power transmission device may receive a response signal for the transmitted signal and a power control signal from the wireless power reception device. The wireless power transmission device may control an operating frequency or a voltage (or both) in the wireless power transmission device for the vehicle according to the power control signal. The wireless power transmission device may transmit wireless power to the wireless power reception device.

Abstract: An uninterruptible power supply, a control method and a power supply system for normally starting the uninterruptible power supply and securing switch devices are provided. The uninterruptible power supply includes a first rectification circuit, a charge-discharge circuit, a bus capacitor, a first switch circuit and a second rectification circuit. The first rectification circuit is connected to the charge-discharge circuit, and is configured to rectify a voltage outputted by the alternating current power supply. The charge-discharge circuit is connected to the bus capacitor, and is configured to charge the bus capacitor after boosting the voltage outputted by the first rectification circuit, until the voltage across the bus capacitor reaches a first voltage. The first switch circuit is connected to the second rectification circuit, and is configured to connect the alternating current power supply to the second rectification circuit.

Abstract: A multiple inverter generator and operating method thereof. A first inverter generator delivers AC) power through a first power line to a power output and a second inverter generator delivers AC power through a second power line. A low current coupler selectively couples the first power line and the second power line with limited electrical current. A parallel power switch selectively couples the first power line and the second power line. A controller activates, while the parallel power switch electrically isolates the first power line from the second power line, the low current coupler for a synchronization time period to form a limited current electrical connection. The controller also configures, within a time out period after activation of the low current couple for the synchronization time period, the parallel power switch to electrically connect the first power line and the second power line.

Abstract: A wireless charging and data transmission system that includes first and second half-bridges coupled in parallel between supply and ground nodes. Each half-bridge includes high-side and low-side transistors. A first high-side driving circuit drives the control terminal of the high-side transistor of the first half-bridge with a first bootstrap voltage at a first node, and a second high-side driving circuit drives the control terminal of the high-side transistor of the second half-bridge with a second bootstrap voltage at a second node. A charge pump circuit generates and maintains a master bootstrap voltage at a master node, which is equal to the voltage at the supply node plus a given voltage. A switch circuit couples the master node to the first node during the low-side conduction period of the first half-bridge and couples the master node to the second node during the low-side conduction period of the second half-bridge.

Abstract: A vehicle includes an engine configured to drive a front-end accessory drive and a tractive element, an energy storage system including a battery and a controller configured to control the flow of electrical energy to and from the energy storage system, a first generator electrically coupled to the energy storage system and configured to be selectively driven by the front-end accessory drive to generate electrical energy and supply energy to the energy storage system to charge the battery, and a second generator electrically coupled to the energy storage system and configured to selectively be driven by the engine to generate electrical energy and supply energy to the energy storage system to charge the battery.

Abstract: An energy conversion circuit, a control method based on the energy conversion circuit, and a vehicle are provided. The energy conversion circuit includes a primary bridge arm module, a resonant module, a secondary bridge arm module, and a control module. The primary bridge arm module includes a first bridge arm and a second bridge arm, and the secondary bridge arm module includes a first secondary switch and a second secondary switch. A drive signal for the first bridge arm, a drive signal for the second bridge arm, a drive signal for the first secondary switch, and a drive signal for the second secondary switch are controlled by the control module, to increase a voltage between the first DC positive terminal and the first DC negative terminal to a preset voltage.

Abstract: A power supply system includes a power storage device, a power supply circuit for supplying DC power from the power storage device to a load device, and a containment member for accommodating the power storage device. The power supply circuit includes a positive wire and a negative wire, a first switch provided on the positive wire, and a second switch provided on the negative wire. One of the first switch or the second switch is disposed in the interior of the containment member, and another one of the first switch or the second switch is disposed on the exterior of the containment member.

Abstract: A multi-modal maximum power point tracking optimization solar photovoltaic system is provided. A maximum power point tracking optimizer is connected to and powered by at least one solar cell.

Abstract: A method of transmitting power of a wireless power transmitter, including a phase of sequentially transmitting a detection signal to a wireless power receiver a plurality of times through a plurality of transmission coils to detect that the wireless power receiver is present; a phase of identifying a transmission coil that has received the signal strength indicator transmitted from the wireless power receiver in response to the detection signal transmitted a plurality of times; a phase of selecting, as a power transmission coil, a transmission coil that has received the signal strength indicator having the most or largest value among the plurality of transmission coils that have received the signal strength indicator as a power transmission coil; a phase of receiving an FOD status packet from the wireless power receiver; a first determination phase of determining whether a foreign object is present in a charging area of the wireless power transmitter based on the FOD status packet; and a power control phase o

Abstract: A full-bridge inverter device includes channel-1 including first inverter formed of first DC link capacitor, first full bridge circuit and first output filter, second voltage and current probes and first AC load, first full bridge circuit being coupled with first gate driver circuit and first sin pulse width modulation that provides first positive half cycle output signal and first negative half cycle output signal; and channel-2 including second inverter formed of second DC link capacitor, second full bridge circuit and second output filter, third voltage and current probes and second AC load, second full bridge circuit being coupled with second gate driving circuit and second sin pulse width modulation that provides second positive half cycle output signal and second negative half cycle output signal. The phase difference between first positive (negative) half cycle output signal and second positive (negative) half cycle output signal is 90 degrees.

Abstract: A plurality of DC power supply apparatuses which are CVCC power supplies have output sides connected in parallel to a load. In each of the plurality of DC power supply apparatuses, an upper limit current maintained in a CC mode is designed to be equal to or lower than a rated current. Reference voltages of the plurality of DC power supply apparatuses are set to different values. The plurality of DC power supply apparatuses supply currents with transition from a CV mode to a CC mode, in the descending order of magnitude of the reference voltages, in correspondence with output currents to the load.

Abstract: Method and apparatus for generating green electrical power. A modified grid-tie configuration is provided in which electrical power is supplied to a load from a utility grid source and a photovoltaic (PV) source (e.g. solar panels). A grid-tie inverter generates alternating current (AC) power from the PV source that is phase aligned with AC power from the grid. In the event of a grid outage, a specially configured transfer switch disconnects the grid from the PV source and connects the PV source to a backup source. The grid-tie inverter again matches the AC power from the PV source with AC power from the backup source to enable continued operation of the PV source during the grid outage. The backup source may utilize an electrolyzer that generates stored hydrogen and a hydrogen fuel cell that converts the stored hydrogen to electricity.

Abstract: Embodiments relate to the field of photoelectric technologies, and provide a method for controlling photovoltaic power generation, a control device, and a photovoltaic power generation system. The method is applied to the photovoltaic power generation system. The system includes at least one photovoltaic string and a control device, the photovoltaic string includes at least one photovoltaic module, each photovoltaic module includes a photovoltaic unit and an optimizer that is connected to the photovoltaic unit, and the photovoltaic unit includes at least one photovoltaic component. The method includes: periodically sending, by the control device, an output voltage reference value update instruction to an optimizer in each photovoltaic string; and receiving, by the optimizer in each photovoltaic string, the output voltage reference value update instruction, and updating an output voltage reference value according to the output voltage reference value update instruction.

Abstract: A power supply includes a converter circuit, a switching circuit and a control circuit. The converter circuit includes a transformer, a primary side switch and a secondary side switch. The switching circuit includes first and second capacitors, first and second sets of switches. In a first phase, the primary side switch is in the conduction state, causing a magnetizing inductor of the transformer to store energy. In a second phase, the primary side switch is in the off state, causing the magnetizing inductor to release the energy. In a first mode of the second phase, a first amount of the energy is transferred through the first set of switches to the first capacitor. In a second mode of the second phase, a second amount of energy is transferred to the second capacitor through the second set of switches.

Abstract: A power supply device that wirelessly transmits power includes: a DC power source; an inverter circuit connected to the DC power source; a resonance circuit connected to the inverter circuit and including a power transmission coil; sensors that detect a current value flowing through the circuits or a voltage value applied to the circuits; and a control device connected to the inverter circuit and the sensor. The control device controls, when causing the power supply device to wirelessly transmit power, the inverter circuit to convert a DC voltage supplied from the DC power source into an AC voltage and supply the AC voltage to the resonance circuit. The control device controls, when diagnosing a sensor abnormality, the inverter circuit to supply the DC voltage to the resonance circuit without converting the DC voltage into the AC voltage and diagnoses a sensor abnormality based on a present sensor detection value.

Abstract: A battery monitoring device monitors an assembled battery in which sets of a plurality of battery cells connected in parallel to each other are connected in series to each other, the battery monitoring device includes an acquisition unit configured to acquire a voltage of the battery cell, a controller configured to control an upper limit value of a current flowing through the battery cell, and a detection unit configured to detect, in a case where the upper limit value is higher than a predetermined value, disconnection in the assembled battery in accordance with a comparison result between the voltage acquired by the acquisition unit and a first threshold value, in which the controller is configured to control the upper limit value such that the upper limit value is equal to or less than the predetermined value when the detection unit detects the disconnection in the assembled battery.

Abstract: An advanced hybrid distributed energy resource (AHDER) system is disclosed. The AHDER includes a fuel power generator system (FPGS) configured to utilize alternative fuel to produce electricity, a main control center (MCC) configured to serve as a central hub of the AHDER system for managing and optimizing power generation and distribution; a battery energy storage system (BESS) configured to store excess energy and provide power; a fast-charging system (FCS) configured to receive AC power from the MCC and convert the AC power to DC power for charging equipment; an emission control subsystem (ECS) configured to reduce pollutants emitted by the FPGS; a combined heat and power (CHP) system configured to recover waste heat from an emission from the FPGS for generating electricity and thermal energy; and a CO2 capture system configured to receive thermal energy from the CHP system and treat exhaust from the ECS for producing liquid CO2.