Abstract: Provided is a current compensation system for solar generators for compensating for noise using an active electromagnetic interference (EMI) filter. An inverting system for solar generators includes a solar inverter converting DC voltage to AC voltage, an EMI filter unit including an active EMI filter to reduce noise corresponding to the AC voltage, a power grid, and at least two or more through lines passing a second current from the power grid to the solar inverter and passing through the EMI filter unit, wherein the active EMI filter includes a noise sensing unit sensing a first current on the at least two or more through lines and generating an output signal corresponding to the first current, an active circuit unit amplifying the output signal to generate an amplified signal, a compensation unit generating a compensation current based on the amplified signal, and a transmission unit providing a path through which the compensation current flows to each of the at least two large current paths.

Abstract: A bipole power transmission scheme includes at least a first converter station that is positioned in-use separate from at least a second converter station. The bipole power transmission scheme also includes at least first and second transmission conduits and a first return conduit to in-use interconnect the first converter station with the second converter station and thereby permit the transfer of power between the first and second converter stations.

Abstract: A control method and system for operating an electrical component from an electrical distribution network maximises the advantage to be gained from the component simultaneously following two power-consumption strategies. The first strategy D(t) is relatively slow-moving, for example increasing consumption when electricity prices are lower, whereas the second F(t) requires fast-moving adjustments, for example when providing a frequency responsive service to counter network power imbalances. The method involves operating the component to follow a strategy with the fast-moving function F(t) superimposed on a baseline power function B(t), with B(t) derived from the slow-moving function D(t). In applying the invention to a binary component (i.e. one that is either “off” or “on”) that is providing the responsive service as part of a group of such components, B(t) is derived both from D(t) and also from past values of F(t).

Abstract: An auxiliary inverter for use with a main inverter of a transmitter of a wireless power transfer system comprises: a coupling element; an output network electrically connected to the coupling element; and an adjustable power source electrically connected to the coupling element via the output network, an input voltage to the coupling element based on a detected signal. The coupling element is configured to induce a voltage in the main inverter of the transmitter of the wireless power transfer system to manage reflected impedance at the main inverter. The induced voltage is based on the input voltage to the coupling element.

Abstract: A low voltage, low frequency multi-level power converter capable of power conversion is disclosed. The power converter may include a low voltage, low frequency circuit that includes a plurality of phase-shifting inverters in series; a plurality of low voltage source inputs, and a plurality of phase-shifting inverters in series. Each of the plurality of phase-shifting inverters may be configured to receive at least one of the plurality of low voltage source inputs; and generate at least one square wave output. A semi-sine wave output may be derived from the generated at least one square wave output.

Abstract: A power generation device capable of maximum power tracking includes a power generation assembly and at least one optimizer, the optimizer includes a maximum power tracking circuit, a drive control circuit, a first switch and a second switch arranged in a chip. The maximum power tracking circuit includes a voltage and current detection unit, a multiplier, and a maximum power tracking processing unit, wherein the multiplier is configured to multiply an assembly output voltage of the power generation assembly by an assembly output current of the power generation assembly to obtain an assembly output power of the power generation assembly; the maximum power tracking processing unit is configured to track and determine a current maximum power of the power generation assembly according to the assembly output power, determine the duty ratio signal according to the current maximum power, and send the duty ratio signal to the drive control circuit.

Abstract: A voltage converter for an electrified vehicle is connected between an external low-voltage source and an external high-voltage source. The voltage converter includes a power conversion device having at least two power conversion components connected in parallel. The voltage converter further includes a safety power switching device, connected to the power conversion device and comprising at least two safety power switching components, configured for providing a protection mechanism for the voltage converter in an OFF or ON selection process thereof. Also included is a safety detection controller, connected to each of the safety power switching components, configured for real-time detection of each of the safety power switching components. A real-time detecting method for the voltage converter may be used in an electrified vehicle.

Abstract: A method for component voltage limitation, and an apparatus and a system for applying the same. At least one photovoltaic cell in a photovoltaic-cell string is controlled to operate in a voltage-limited mode, in response to receiving an instruction for enabling voltage limitation. Thereby, the voltage of the photovoltaic-cell string is reduced. A quantity of photovoltaic modules connected in series can be increased, while a highest voltage of the system is guaranteed not to exceed a corresponding requirement. A system cost is reduced. The photovoltaic cell operating in the voltage-limited mode is controlled to resume a normal output, in response to receiving the instruction for suspending voltage limitation. The output voltage of the photovoltaic-cell string is increased. Thereby, a rate of utilization on a direct voltage, and a PVIR of DC/AC are improved for the photovoltaic system.

Abstract: A generator system can include a first generator, a first controller operatively connected to the first generator to control a first generator voltage output, a second generator, and a second controller operatively connected to the second generator to control a second generator voltage output. The first generator and the second generator can be configured in a parallel generator configuration to share load power. The first controller and the second controller can be configured to provide foldback control. The first controller and the second controller can be configured to calibrate foldback to correct for current sharing imbalance between the first generator and the second generator.

Abstract: A high efficiency solar power system combining photovoltaic sources of power (1) can be converted by a base phase DC-DC photovoltaic converter (6) and an altered phase DC-DC photovoltaic converter (8) that have outputs combined through low energy storage combiner circuitry (9). The converters can be synchronously controlled through a synchronous phase control (11) that synchronously operates switches to provide a conversion combined photovoltaic DC output (10). Converters can be provided for individual source conversion or phased operational modes, the latter presenting a combined low photovoltaic energy storage DC-DC photovoltaic converter (15) at string or individual panel levels.

Abstract: One or more of the photovoltaic panel controllers determine according to specific information in a control signal whether to control one or more photovoltaic panels according to the control signal.

Abstract: A system for charging a battery includes three sub-modules, each receiving a respective phase of a three-phase alternating current (AC) signal. The three sub-modules cooperate to transform the respective phases of the three-phase AC signal to a direct current (DC) signal by passing the respective phases of the three-phase AC signal through a respective semiconductor device configured to discontinuously modulate the respective phase of the three-phase AC signal to convert it to a DC signal provided to the battery to charge the battery.

Abstract: In the field of high voltage direct current (HVDC) power transmission networks, there is a need for improvements to allow a single power converter to control individual AC network voltages carried by multiple AC transmission conduits to multiple AC network elements, such as respective wind parks.

Abstract: The application discloses a power conversion system and a controlling method of the same. The power conversion system includes: n choppers, comprising n switching arms connected in parallel, each chopper including: the switching arm, an inductor having a first end connected to a midpoint of the switching arm, and a first capacitor connected in parallel to the switching arm; and n DC components corresponding to the n choppers with a one-to-one relation, wherein one of the DC components is a DC power supply or a DC load, first ends of the DC components are connected together, and a second end of each of the DC components is connected to a second ends of the inductor of the corresponding chopper, where n is a natural number of 2 or more.

Abstract: A system and method for pre-charging a DC link of a multi-level power converter, to reduce electrical transients or to decrease a charging current when a converter contactor/disconnect switch is closed, is described. The systems and methods of the present disclosure also provides a new and simplified system for pre-charging a DC link of a multi-level power converter by leveraging a neutral point of a multi-level power converter and a single-line connection to the grid side of the power converter. The DC link charger of the present disclosure, therefore, is capable of reducing the quantity of dedicated superfluous hardware and/or excess resistors, contactors, transformers, fuses, diodes, balancing components, rectifier modules, etc. demanded by conventional systems. Reduced quantities of electronic components and hardware can thereby decrease system costs per unit and lead to significant cost savings.

Abstract: A bipole power transmission scheme includes a first converter station that is positioned, in-use, remote from a second converter station. First and second transmission conduits and a return conduit interconnect, in-use, the first converter station with the second converter station and thereby permit the transfer of power between the first and second converter stations. The first converter station includes a first power converter, a second power converter, and a converter station controller.

Abstract: A power conversion system includes: a first power converter to perform power conversion between a first AC system and a DC circuit; and a second power converter to perform power conversion between a second AC system and the DC circuit. Each of the first power converter and the second power converter includes a plurality of submodules connected in series. Each of the plurality of submodules includes a plurality of switching elements and a capacitor. A first fundamental frequency of the first AC system is greater than a second fundamental frequency of the second AC system. A first average voltage value of a capacitor in a first submodule included in the first power converter is larger than a second average voltage value of a capacitor in a second submodule included in the second power converter.

Abstract: Different systems to achieve solar power conversion are provided in at least three different general aspects, with circuitry that can be used to harvest maximum power from a solar source (1) or strings of panels (11) for DC or AC use, perhaps for transfer to a power grid (10) three aspects can exist perhaps independently and relate to: 1) electrical power conversion in a multimodal manner, 2) alternating between differing processes such as by an alternative mode photovoltaic power converter functionality control (27), and 3) systems that can achieve efficiencies in conversion that are extraordinarily high compared to traditional through substantially power isomorphic photovoltaic DC-DC power conversion capability that can achieve 99.2% efficiency or even only wire transmission losses. Switchmode impedance conversion circuits may have pairs of photovoltaic power series switch elements (24) and pairs of photovoltaic power shunt switch elements (25).

Abstract: A method to control storage into and depletion from multiple energy storage devices. The method enables an operative connection between the energy storage devices and respective power converters. The energy storage devices are connectible across respective first terminals of the power converters. At the second terminals of the power converter, a common reference is set which may be a current reference or a voltage reference. An energy storage fraction is determined respectively for the energy storage devices. A voltage conversion ratio is maintained individually based on the energy storage fraction. The energy storage devices are stored individually with multiple variable rates of energy storage through the first terminals. The energy storage is complete for the energy storage devices substantially at a common end time responsive to the common reference.

Abstract: A photovoltaic power generation system includes a protection switch and a plurality of DC-DC converters. Each DC-DC converter includes a direct current bus, a DC-DC circuit, and at least one input interface. The input interface is configured to connect to a photovoltaic unit. The photovoltaic unit includes at least one photovoltaic module. The input interface is connected to the direct current bus by using the protection switch, the direct current bus is connected to an input end of the DC-DC circuit, and an output end of the DC-DC circuit is an output end of the DC-DC converter. The protection switch includes a release device and a switching device that are connected in series. The release device is configured to: when a short-circuit fault occurs on a line in which the release device is located, control the switching device to be disconnected.

Abstract: A power conversion circuit is used in a solar array suitable for, e.g., roadside adjacent installation. The power conversion circuit includes an inverter with a first stage electrically coupled to one or more solar panels. A third stage of the circuit has a DC to AC converter that provides less than a 50 VAC load voltage to a load, and a second stage that is coupled between the first and third stages and provides an isolated electrical power coupling therebetween. A sync interface communicatively couples a controller to other controllers dedicated to one or more other respective inverters of the solar array via a sync signal. The controllers synchronize the third stages of the inverters via the sync signal. The third stages of the inverters are coupled in series to provide a load output voltage.

Abstract: The present application provide a control method of a power battery heating system. The method includes: controlling all upper bridge arms of a first bridge arm group and all lower bridge arms of a second bridge arm group to be turned on, and controlling all lower bridge arms of the first bridge arm group and all upper bridge arms of the second bridge arm group to be turned off, so as to form a first loop; controlling all the lower bridge arms of the first bridge arm group and all the upper bridge arms of the second bridge arm group to be turned on, and controlling all the upper bridge arms of the first bridge arm group and all the lower bridge arms of the second bridge arm group to be turned off, so as to form a second loop. The method is used to heat the power battery.

Abstract: A converter system includes a plurality of converters, a sampling circuit, and a control circuit. The plurality of converters are connected in parallel. Each converter includes a detection circuit which includes a first switch and at least two resistors. The first switch is connected in parallel with one of the at least two resistors. The control circuit control the sampling circuit to collect a first voltage and a second voltage, where the first voltage is a voltage that is between a second bus and a ground cable and that is collected by the sampling circuit when first switches in detection circuits of a first quantity are in a turn-on state, the second voltage is a voltage that is between the second bus and the ground cable and that is collected by the sampling circuit when first switches in detection circuits of a second quantity are in a turn-on state.

Abstract: A high efficiency solar power system combining photovoltaic sources of power (1) can be converted by a base phase DC-DC photovoltaic converter (6) and an altered phase DC-DC photovoltaic converter (8) that have outputs combined through low energy storage combiner circuitry (9). The converters can be synchronously controlled through a synchronous phase control (11) that synchronously operates switches to provide a conversion combined photovoltaic DC output (10). Converters can be provided for individual source conversion or phased operational modes, the latter presenting a combined low photovoltaic energy storage DC-DC photovoltaic converter (15) at string or individual panel levels.

Abstract: A polyphase power-supply device includes first to N-th DC-DC converters connected in parallel to each other between an input terminal and an output terminal and a switching controller configured to perform interleave control on the first to N-th DC-DC converters by supplying first to N-th pulse width modulation (PWM) signals to the first to N-th DC-DC converters, respectively, where N is any integer equal to or greater than two. A switching frequency of the first PWM signal is changed at a change time point at which a cycle of the first PWM signal starts. A length of a cycle of the k-th PWM signal firstly appearing after the change time point is shorter than lengths of subsequent cycles of the k-th PWM signal appearing the first cycle of the k-th PWM signal. This polyphase power-supply device has high reliability.

Abstract: Uninterruptible power supplies, power modules, and non-transitory computer readable mediums storing instructions for operating such power modules, the power modules comprising an input configured to receive AC power from an AC power source, an output configured to provide AC output power to a load, and a plurality of power modules coupled in parallel between the input and the output, each power module of the plurality of power modules configured to provide at least a portion of the AC output power to the output. Each power module of the plurality of power modules comprises a current compensator stage configured to generate a current error signal based on output current of a corresponding power module and a gain adjustment stage configured to adjust the current error signal based on a measurement of the output current and a desired output current of the corresponding power module.

Abstract: A power system (150) operable to implement a power balancing control scheme is provided. In one aspect, a power system (150) includes multiple independent power supplies (182A, 182B) with independent batteries (172A, 172B) feeding onto a common power bus (180). The power supplies (182A, 182B) regulate the voltage on the common power bus (180) at the same time. The power balancing control scheme, when implemented, causes the load on the common power bus (180) to be shared among the individual power supplies (182A, 182B) with a specified load distribution. The specified load distribution can be set or determined to balance the State of Charge (SoC) of the batteries (172A, 172B) over time whilst taking into account the constraints or limits of the elements (172A, 172B, 182A, 182B) of the power system (150).

Abstract: A power supply system including: a DC power trunk line; a demand-side device; a supply-side device that is configured to supply electric power and that is connected with the DC power trunk line to output a DC power to the demand-side device that is connected with the DC power trunk line to receive a DC power, and a calculator that is configured to: set a power-feeding voltage of the supply-side device on a supply side; set a power-receiving voltage of the demand-side device on a demand side; and regard a charge amount or a time integration of current value supplied from the supply-side device to the DC power trunk line, as well as a charge amount or a time integration of current value supplied from the DC power trunk line to the demand-side device, as an amount of power interchange.

Abstract: A fault handling system of a solid-state transformer, including a first power unit and a second power unit that are cascaded and connected is provided. The first power unit includes a first auxiliary supply, a first control module, and a first communication module. The first auxiliary supply and the first control module are both electrically connected to two ends of a first busbar capacitor. The first control module is configured to detect a voltage of the first busbar capacitor. The second power unit includes a second auxiliary supply and a second control module. The second auxiliary supply and the second control module are both electrically connected to two ends of a second busbar capacitor. The first communication module outputs fault information to the second control module when the first control module detects that the voltage of the first busbar capacitor is greater than a threshold.

Abstract: A battery powered electronic device can include a battery to power one or more loads, a first DC-DC converter having an input coupled to the battery and an output, and a second DC-DC converter cascaded with the first DC-DC converter and coupled to a second load subject to pulsed operation. The first and second converters may be configured so as to isolate the one or more loads from transients associated with the pulsed operation of the second load. The second converter may have an input coupled to the output of the first converter and an output coupled to the second load. Alternatively, the second converter may be a bidirectional converter having first terminals coupled to the output of the first converter and second terminals coupled to an energy storage device.

Abstract: Photovoltaics and an MPPT DC/DC converter powers a DC bus of a controller. It uses an electric heat pump to heat a mass like water, and also has a resistive heating element to heat the mass. A microcontroller controls a variable frequency (VFD) motor drive to power the electric heat pump when sufficient solar power is available to run the heat pump and uses the resistive element to heat the thermal mass when insufficient solar power exists for the heat pump or when excess solar power is available. A controller has an MPPT input for solar power and a VFD to provide power through an output to a heat pump-based water heater and an output to power a resistive water heating element. A microcontroller determines solar power available and runs the heat pump when possible and the resistive element when insufficient power is available or when excess power is available.

Abstract: A method to control storage into and depletion from multiple energy storage devices. The method enables an operative connection between the energy storage devices and respective power converters. The energy storage devices are connectible across respective first terminals of the power converters. At the second terminals of the power converter, a common reference is set which may be a current reference or a voltage reference. An energy storage fraction is determined respectively for the energy storage devices. A voltage conversion ratio is maintained individually based on the energy storage fraction. The energy storage devices are stored individually with multiple variable rates of energy storage through the first terminals. The energy storage is complete for the energy storage devices substantially at a common end time responsive to the common reference.

Abstract: An insulated gate field effect transistor (IGFET) based converter circuit is described that includes a direct current input comprising a high voltage input and a low voltage input, an IGFET gate input, and an equivalent phase leg comprising a plurality of parallel-connected cells. The parallel-connected cells each include: a first wide bandgap IGFET having a first drain electrode connected to the high voltage input, a first gate electrode connected to a first gate control input, and a first source electrode; a second wide bandgap IGFET having a second drain electrode connected to the first source electrode, a second gate electrode connected to a second gate control input, and a second source electrode connected to the low voltage input; and a step-inducing inductor coupled to: the first source electrode of the first wide bandgap IGFET, and an output node. The step-inducing inductor is connected to the output node.

Abstract: A frequency support system arranged for providing frequency support to an AC grid. The system includes an ES arrangement, and a bi-directional DC/AC power electronic converter interface configured for connecting the ES arrangement with the grid. The ES arrangement includes a plurality of series connected ES groups, each ES group including a plurality of parallel connected ES modules, each ES module including an energy storage interfaced by a bi-directional power electronic ES converter configured for connecting the ES with a DC side of the converter interface.

Abstract: Systems, apparatuses, and methods are described for power conversion. The power conversion may be done by a plurality of power devices with different configurations. For example, the plurality of power devices may include one or more converters with an upside-up buck configuration and one or more converters with an upside-down buck configuration. The power conversion may be done by one or more power devices that may be configurable between different modes of configuration. For example, one or more power converters may be configured in either an upside-up buck configuration mode or an upside-down buck configuration mode. The selection of a certain mode of configuration of the converter may be permanent or non-permanent.

Abstract: Example embodiments of systems, devices, and methods are provided for electric vehicles that are subject to intermittent charging, such as rail-based electric vehicles, having one or more modular cascaded energy systems. The one or more modular systems can be configured to supply multiphase, single phase, and/or DC power to numerous motor and auxiliary loads of the EV. If multiple systems or subsystems are present in the EV, they can be interconnected to exchange energy between them in numerous different ways, such as through lines designated for carrying power from the intermittently connected charge source or through the presence of modules interconnected between arrays of the subsystems. The subsystems can be configured as subsystems that supply power for motor loads alone, motor loads in combination with auxiliary loads, and auxiliary loads alone.

Abstract: An adaptive control method for multiple inverters in parallel and a system with multiple inverters in parallel. The method average distribute the active power of each inverter unit by means of acquiring state information of inverter units, adjusting a reference voltage output by each of the inverter units based on a deviation between the output active power and the average active power, which is calculated by the state information, re-acquiring the state information and calculating a voltage component difference and a current component difference between the inverter units based on the adjusted reference voltage, and then adaptively adjusting the virtual impedance of the slave inverter unit according to the voltage component difference and the current component difference so that the output impedance of the slave inverter unit and master inverter unit is matched.

Abstract: The present disclosure provides a high-frequency uncontrolled rectifier-based DC transmission system for an offshore wind farm, including a DC system and an offshore AC system. The offshore AC system mainly includes wind turbines based on permanent magnet synchronous generators with full-scale power converters, AC submarine cables, and offshore step-up stations. The DC system includes an offshore station and an onshore station that are connected by DC submarine cables, where a converter of the offshore is a three-phase six-pulse uncontrolled rectifier bridge, while a converter of the onshore station is MMC. Each of the offshore AC system and the offshore station has a rated frequency far above 50 Hz, which can usually be chosen to be in a range of about 100 Hz to 400 Hz. The disclosed transmission system allows for a great reduction in construction costs and demonstrating great application potentials in actual engineering.

Abstract: A behind-the-meter system for controlled distribution of solar power to units in a multi-unit building connected to an electric power grid. The system includes a grid-tied inverter connectable between a solar power generator and the electric power grid sensors for measuring instantaneously power demand and solar power consumption of the units and solar power generation and switches for connecting and disconnecting the units from the solar power generator. A controller, connected to the sensors and the switches determines relative values of power demand and solar power consumption of the units based on the instantaneous measurements of the power demand and the solar power consumption, and controls the switches to distribute solar power from the solar power generator.

Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed for regulated hybrid converters. An example apparatus includes an input terminal; an output terminal, a first converter circuit coupled between the input terminal and an intermediate node, the first converter circuit having a first switch node, a second converter circuit coupled between the intermediate node and the output terminal, the second converter circuit having a second switch node; a first inductor coupled between the first switch node and the second switch node, and a second inductor coupled between the second switch node and the output terminal.

Abstract: A power combining technique includes receiving a first voltage at a first input and a second voltage at a second input. The power combining technique further includes combining, with at least two power converters, power received from the first and second inputs into a single power rail. A power balancing technique further includes controlling the at least two power converters such that a first one of the power converters outputs an amount of current to the single power rail that is proportional to and/or equal to the amount of current output by another of the power converters.

Abstract: Disclosed is an adaptable DC-AC inverter system and its operation. The system includes multiple DC input sources as input to provide a stable operation under various conditions. DC input sources may be added to the system or removed from the system without impacting the functionality of the system. The disclosed system is suited for solar energy harvesting in grid-connected or off-grid modes of operation.

Abstract: A smart card inlay comprising an inductive antenna and a DC-DC converter. The inductive antenna is configured to (i) communicate wirelessly with a card terminal, and (ii) power card circuitry via inductive coupling to the card terminal. The DC-DC converter has an input coupled to the inductive antenna and an output connectable to card circuitry. The DC-DC converter is configured to receive an input power signal from the inductive antenna and convert that input power signal to an output power signal to send to the card circuitry, the output power signal matching the operating current and/or operating voltage of the card circuitry.

Abstract: Power distribution modules are configured to distribute power to a power-consuming component(s), such as a remote antenna unit(s) (RAU(s)). By “hot” connection and/or disconnection, the power distribution modules can be connected and/or disconnected from a power unit and/or a power-consuming component(s) while power is being provided to the power distribution modules. Power is not required to be disabled in the power unit before connection and/or disconnection of power distribution modules. The power distribution modules may be configured to protect against or reduce electrical arcing or electrical contact erosion that may otherwise result from “hot” connection and/or connection of the power distribution modules.

Abstract: A photovoltaic system includes a controller and plurality of photovoltaic strings that are independently controlled. The controller enables some photovoltaic strings to be in a maximum power point tracking state, and the remaining photovoltaic strings to be in a power output limited state. The system implements maximum power point tracking detection so that the maximum power point power and the maximum power point voltage are updated in real time. Further, the working status of the power supply system can be fed back in real time, so that the photovoltaic system can predict the capacity of an energy storage apparatus or regulate charging and discharging of the energy storage apparatus. After a curtailment state ends, the photovoltaic system is relatively quickly restored to the normal working state, so that a loss of generated power is reduced.

Abstract: A physical address determining method, apparatus, and device, and a storage medium, and belongs to the field of solar power generation, includes: controlling at least two slave nodes to sequentially start up, and detecting a change status of an input voltage of the master node; dividing a photovoltaic power generation system into a plurality of photovoltaic strings; and for each candidate photovoltaic string, controlling any slave node located in the candidate photovoltaic string to start up and other slave nodes to shut down, and using the physical address as a physical address of the candidate photovoltaic string. This disclosure provides a manner of automatically determining a physical address of a photovoltaic string, thereby implementing photovoltaic-string locating and expanding a system function range. When an anomaly occurs, the anomaly can be eliminated in a timely manner, thereby improving system stability.

Abstract: An internal voltage generator of a smart card and a smart card including the same. The internal voltage generator may include: a mode detector that generates a mode signal indicating a contact mode or a contactless mode; a low-drop out (LDO) regulator including an error amplifier, where the LDO regulator is responsive to the mode signal to: in the contact mode, drive the error amplifier with a second driving voltage to generate an error voltage, and regulate the second driving voltage based on the error voltage to generate a first output voltage, and in the contactless mode, drive the error amplifier with the first driving voltage to generate the error voltage, and regulate the second driving voltage based on the error voltage to generate the first output voltage.

Abstract: A momentary circuit interrupter in series connection with a mechanical switch to provide protection against short circuit faults in a DC power circuit. The momentary circuit interrupter injects a transient voltage pulse via a pulse transformer to reduce a DC fault current to near zero in a DC circuit branch, thus allowing the mechanical switch to disconnect the faulty branch under a near zero-current condition. The power electronic circuit on the primary side of the transformer controls the discharge of a plurality of pre-charged capacitors to generate the transient voltage pulse during the fault interruption process, but otherwise does not incur any power loss during normal operation. The secondary winding of the pulse transformer conducts the main DC current, and is highly conductive to minimize the conduction power loss.

Abstract: Battery management circuits include a first charging channel, a Cuk circuit, and a communication control circuit. A battery is charged through the first charging channel based on charging voltage and/or charging current provided by a power supply device. The battery includes a first cell and a second cell coupled in series. The communication control circuit is configured to communicate with the power supply device, to make magnitude of the charging voltage and/or charging current provided by the power supply device match a present charging stage of the battery, and the communication control circuit is further configured to send a drive signal to the Cuk circuit to drive the Cuk circuit to work, to make energy of the first cell and the second cell be transferred through the Cuk circuit to balance voltage of the first cell and voltage of the second cell.

Abstract: The disclosure discloses a photovoltaic power optimization system, comprising: a plurality of photovoltaic panels; a photovoltaic optimizing module array comprising a plurality of photovoltaic optimizing modules connected in series, each of the photovoltaic optimizing modules being electrically connected to at least one of the photovoltaic panels; an inverter electrically connected to an output terminals of the photovoltaic optimizing module array for converting a DC power into an AC power; and a data center unit communicates wirelessly with at least one of the photovoltaic optimizing modules, and also communicates with the inverter via power line.