Abstract: Provided are a battery holder, a power transfer device, an electric vehicle and an installation method for electric vehicle. The battery holder includes a fixing bracket, the fixing bracket has an upper-position accommodation cavity, an upper-position sensor is arranged in the upper-position accommodation cavity, the upper-position sensor is used for detecting the supporting portion of the battery pack, so as to determine whether the battery pack has been installed in place relative to the battery holder in the height direction of the electric vehicle; and/or, the fixing bracket has a front-position accommodation cavity, a front-position sensor is arranged in the front-position accommodation cavity, the front-position sensor is used to detect the supporting portion of the battery pack, so as to determine whether the battery pack is installed in place relative to the battery holder in the length direction of the electric vehicle.

Abstract: Provided are a battery holder, a power transfer device, an electric vehicle and an installation method for electric vehicle. The battery holder is mounted on the body of the electric vehicle to fix the battery pack, the battery holder includes a plurality of supporting devices, the plurality of supporting devices are distributed on both sides of the fixing bracket in the length direction of the fixing bracket; in the length direction of the fixing bracket, both sides of the fixing bracket are both arranged with the lock mechanism, the lock mechanism is a primary lock mechanism and a secondary lock mechanism; the secondary lock mechanism is used to provide a secondary locking function or a locking protection function for the battery pack, when the primary lock mechanism fails, it is used to prevent the battery pack from falling.

Abstract: An uninterruptible power supply apparatus includes: an electromagnetic contactor including a first terminal that receives a first AC voltage supplied from an AC power supply and a second terminal connected to an AC node; a capacitor that is connected to a DC line and stores DC power; a converter that transmits and receives electric power between the AC node and the DC line; and a controller. In an activation mode, the controller turns on the electromagnetic contactor after controlling the converter such that a frequency and a phase of a second AC voltage supplied from the converter to the AC node match a frequency and a phase of the first AC voltage. In a normal operation mode after the activation mode, the controller controls the converter such that a DC voltage of the DC node attains to a reference voltage.

Abstract: The present disclosure is directed to energy storage and supply management system. The system may include one or more of a control unit, which is in communication with the power grid, and an energy storage unit that stores power for use at a later time. The system may be used with traditional utility provided power as well as locally generated solar, wind, and any other types of power generation technology. In some embodiments, the energy storage unit and the control unit are housed in the same chassis. In other embodiments, the energy storage unit and the control unit are separate. In another embodiment, the energy storage unit is integrated into the chassis of an appliance itself.

Abstract: The present disclosure provides curtailing photovoltaic (PV) power output and autonomous load breaking in a backup mode of an electrical system. The electrical system includes a PV system, an energy storage system having a storage converter, and an energy control system. The energy control system is electrically coupled to the PV system, the energy storage system, and a plurality of backup loads. The electrical system includes an autonomous load breaker electrically coupled to a first backup load. When the energy control system switches from an on-grid mode to the backup mode, the storage converter adjusts the frequency of the power supplied to the backup side of the energy control system to a setpoint frequency that curtails PV power output, and the autonomous load breaker electrically disconnects the first backup load from the energy control system.

Abstract: The present disclosure relates to an emergency lighting circuit, an emergency start control method thereof and an emergency lighting system. When an emergency start condition is met, matching can be performed in a preset dimming database according to type information of load lighting equipment connected to a current emergency lighting circuit to obtain a dimming parameter value matching a power value required by the load lighting equipment, and finally, the load lighting equipment is directly controlled to start with the dimming parameter value. Through the above solution, when emergency lighting is started, there is no need to spend time in regulating power of the load lighting equipment, and a corresponding power value can be ensured when the load lighting equipment is started, which is highly reliable in emergency lighting start.

Abstract: A power supply system includes: a capacitive first battery; an output-type second battery having a smaller heat capacity than the first battery; a voltage converter that converts a voltage between first and second power circuits; a power converter that converts power between the first power circuit and a drive motor; and a power controller that operates the voltage converter and the power converter. The power controller is configured to: after a start of operation, execute a power pass control under which power is transferred between the first and second batteries, until a total output upper limit Ptot_max of all the batteries exceeds a travelable threshold value Pready1; and subsequent to the power pass control, execute a second priority control under which the second battery is discharged in preference to the first battery, until a first output upper limit P1_max of the first battery exceeds a margin traveling threshold value Pready2.

Abstract: An energy control system (ECS) for controlling an energy storage system (ESS's) that includes energy storage devices(s) or an energy storage combination (ESDC's) including?1 of the energy storage devices and ?1 of the energy storage combinations. A power conversion system is coupled to an output of the ESDC, and a transformer is coupled to an output of the power conversion system. The ECS includes an ECS server and an ESS adapter configured for providing an interface between ECS server and the ESS. The ECS server is configured for reading status data from the ESS and submitting schedules including selected charging and discharging times to the ESS, monitoring or displaying a variance between an expected performance of the ESS based on the schedules and an actual ESS performance, and responsive to the variance being determined to be above a predetermined threshold, sending an update of the schedules to the ESS.

Abstract: An energy supply network has a bus line with a line impedance for energy distribution. The energy supply network also includes a number of power-electronic converters having a respective commutation capacitor wherein the storage capacity thereof is selected in such a way that a controlling of the associated power-electronic converter is guaranteed during operation of the energy supply network and an excess of voltage is managed during a commutation. At least one energy accumulator is provided, which can be connected selectively to the bus line by controlling a switch device via a computer unit, wherein the storage capacity of the energy accumulator is substantially greater than the storage capacity of a respective commutation capacitor.

Abstract: A power supply control device includes a first system, a second system, an inter-system switch, a battery switch and a controller. The controller turns off an inter-system switch that connects and disconnects the systems and turns on a battery switch that connects and disconnects a second power supply to and from the second system in response to an abnormality of a first power supply or the second power supply being detected and thereafter turn on the inter-system switch and turns off the battery switch in response to determination that there is no abnormality in the power supplies. Before turning on the inter-system switch, when voltage difference between the power supplies is equal to or larger than a threshold, the controller performs convergence control, and after determining that there is no abnormality in the power supplies, the controller keeps the battery switch turned off while performing the convergence control.

Abstract: An information processing apparatus includes a power processor, an interface, a first detector that detects at least one of a voltage value and a current value on an electric power line which connects the power processor and the interface, a second detector that detects at least one of a voltage value and a current value on the electric power line, a switch that switches a supply of electric power supplied from the interface to an outside, and a controller. The controller controls the switch to restrict the electric power supplied from the interface to an outside in a case where at least one of a detection value of the first detector and a detection value of the second detector is equal to or greater than a threshold value.

Abstract: A power device includes: a DC voltage output circuit that generates a DC internal power voltage from external supply power; a capacitor that is connected to the internal power voltage; and a voltage supply control circuit that monitors a voltage level of the internal power voltage and that, when detecting a drop in the internal power voltage, cuts off supply of the internal power voltage. The power device supplies internal power to a load. The power device supplies, to a first load that is a part of the load, the internal power voltage, and supplies, to a second load that is a load other than the first load, the internal power voltage via the voltage supply control circuit.

Abstract: A reference capacity determiner determines a reference capacity of each power storage apparatus, under an assumption that power is not transmitted/received among the customer facilities. An actual capacity determiner determines an actual capacity of each power storage apparatus, under an assumption that power is transmitted/received among the customer facilities. A characteristic value determiner determines a first number of charging/discharging cycles, under an assumption that power is not transmitted/received among the customer facilities and each power storage apparatus has the reference capacity.

Abstract: A circuit includes an emergency lighting system and an AC/DC converter. An output terminal of the emergency lighting system is electrically connected to a LED load, and the other output terminal DIM of the emergency lighting system is electrically connected to a switch S2. The switch S2 is controlled by the emergency lighting system. The emergency lighting system includes an AC input detection module, a switching time detection module and a lithium battery. The AC input detection module is electrically connected to a neutral wire VN and a live wire VL. The switching time detection module is electrically connected between an output terminal of the AC input detection module and the terminal DIM. An output terminal of the AC/DC converter is electrically connected to a positive electrode of the lithium battery, and the other output terminal of the AC/DC converter is electrically connected to the LED load.

Abstract: A power flow control device intended to be used in a mesh network. The device includes a first voltage source connected between a first terminal (B1) and a third terminal (B3). A second voltage source is connected between a second terminal (B2) and the third terminal (B3). A current source is connected alternately to the first voltage source and the second voltage source and configured to ensure a transfer of energy between the first voltage source and the second voltage source. A switching means is arranged to allow the current source to be connected alternately in parallel with the first voltage source or in parallel with the second current source.

Abstract: A USB Type-C device supporting a bidirectional power supply, includes: a first device terminal configured to be coupled to a second USB Type-C device; a second device terminal configured to be coupled to a rechargeable DC voltage power source; and a reversible switched-mode power supply coupled to the first device terminal and the second device terminal.

Abstract: An emergency unit (1) is provided, comprising input terminals (I1, I2) for supplying the emergency unit (1) with AC power, a battery charging unit (40) designed for charging a battery unit (30) of the emergency unit (1) by using the AC power, a DC/DC converter (10), supplied by the battery unit (30) and designed to provide DC power to DC power output terminals (O1, O2) designed for supplying power to emergency lighting means (EL), a control unit (20) designed for being supplied with a signal indicating the state of the AC power and for outputting commands to the battery charging unit (40) and to the DC/DC converter (10). The control unit (20) can assume a state (S6) in which it causes the DC/DC converter (10) to provide DC power based on the battery unit and at the same time start the operation of the battery charging unit (40).

Abstract: Apparatuses, systems and methods for configuring and managing the combination of strings of photovoltaic energy generators to improve the energy production performance of such generators. The strings of photovoltaic energy generators are connected to terminals in a combiner box having receptacles for receiving removable modular units of various types. Removable modular units with measurement capabilities are used in the combiner boxes to measure the direct current input provided by the strings; and in light of the measurements, the removable modular units can be selectively downgraded to simpler units that do not have measurement capabilities to reduce cost, and/or selectively upgraded to more sophisticated units that can adjust the output of the respective strings, such as upconverting the output voltage of the respective strings, to improve the performance of the strings.

Abstract: Disclosed are systems and methods relating to managing and sharing resources within a spatially-distributed electrical power network in a fully distributed fashion. The electrical power network includes source nodes each having a power source and a local controller. The electrical power network includes a physical layer where the source nodes are connected to a power distribution network including one or more loads. The electrical power network also includes a communication layer for communicating power information between source nodes and neighbor source nodes of the electrical power network.

Abstract: An improved method for sharing power between multiple battery energy storage systems (BESS) connected to a common DC network having a nominal voltage wherein the current from each BESS is regulated based upon a voltage-current characteristic which defines an output current which increases linearly in a predetermined ratio as the measured system voltage decreases. The predetermined ratio is constant in respect of each BESS. The output current of each BESS varies based upon an external signal that varies with the state of charge of the BESS.

Abstract: A method of controlling a power converter having a plurality of parallel-connected switching devices, the method comprising: measuring a threshold voltage of each of the parallel switching devices at start up of the parallel power converter in an initial self-calibration process; and determining synchronization of a time at which the threshold voltages of the respective switching devices occur.

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: The invention provides an uninterruptible power supply, which comprises a battery management circuit and a control circuit. The battery management circuit is electrically coupled to each battery of at least one battery string for measuring the voltage of each battery. When the battery strings discharge, the control circuit obtains the voltage of each battery through the battery management circuit to calculate the discharge current of each battery, and determines whether there is any measured voltage having dropped to an EOD voltage corresponding to a discharge current of a corresponding battery. When the determination result is positive, the control circuit controls the uninterruptible power system to stop the discharging of at least one battery string in which there is at least one measured voltage having dropped to an EOD voltage corresponding to a discharge current of a corresponding battery. Furthermore, a corresponding battery management apparatus is also provided.

Abstract: A method, apparatus, system and computer program is provided for controlling an electric power system, including implementation of a voltage control and conservation (VCC) system used to optimally control the independent voltage and capacitor banks using a linear optimization methodology to minimize the losses in the EEDCS and the EUS. An energy validation process system (EVP) is provided which is used to document the savings of the VCC and an EPP is used to optimize improvements to the EEDCS for continuously improving the energy losses in the EEDS. The EVP system measures the improvement in the EEDS a result of operating the VCC system in the “ON” state determining the level of energy conservation achieved by the VCC system.

Abstract: The invention disclosed here is a display system for managing power and security for a plurality of hand-held electronic devices sold to consumers in a retail location. The display includes features that allow power to be supplied to individual devices and security sensors without continuous hard wiring or multi-conductor retractor cables. The display also allows for individual security alarms to be triggered when a theft occurs. Security alarm conditions are preferably triggered via wireless signals.

Abstract: A system stabilizing controller for estimating and controlling stability of a power grid includes a collection unit collecting grid information including a power flow amount from the power grid and a calculation unit calculating a generator shedding amount at a fault observation point on the basis of the grid information and estimating a correlation line on the basis of the power flow amount and generator shedding amount. The calculation unit determines a generator phase angle curve that is the relationship between the internal generator phase angle of a generator connected to the power grid and the power flow amount, determines a stability limit power flow amount on the basis of the amounts of generator acceleration energy and deceleration energy in the generator phase angle curve, determines a stability limit generator shedding amount corresponding to the stability limit power flow amount, and estimates a correlation line including a stability limit point.

Abstract: The invention disclosed here is a display system for managing power and security for a plurality of hand-held electronic devices sold to consumers in a retail location. The display includes features that allow power to be supplied to individual devices and security sensors without continuous hard wiring or multi-conductor retractor cables. The display also allows for individual security alarms to be triggered when a theft occurs. Security alarm conditions are preferably triggered via wireless signals.

Abstract: A DC/AC converter apparatus is disclosed for converting DC power of a DC energy source into AC power for supplying a load and or the utility grid. The DC/AC converter apparatus is adapted to automatically control the amount of both active and reactive electrical power that is exchanged with the utility grid in order to optimize the electrical power usage of the micro grid.

Abstract: The invention disclosed here is a display system for managing power and security for a plurality of hand-held electronic devices sold to consumers in a retail location. The display includes features that allow power to be supplied to individual devices and security sensors without continuous hard wiring or multi-conductor retractor cables. The display also allows for individual security alarms to be triggered when a theft occurs. Security alarm conditions are preferably triggered via wireless signals.

Abstract: The invention disclosed here is a display system for managing power and security for a plurality of hand-held electronic devices sold to consumers in a retail location. The display includes features that allow power to be supplied to individual devices and security sensors without continuous hard wiring or multi-conductor retractor cables. The display also allows for individual security alarms to be triggered when a theft occurs. Security alarm conditions are preferably triggered via wireless signals.

Abstract: Embodiments of the invention improve efficiency and address the stability issues that arise when a boost converter is used for both backlight WLEDs and camera flash applications, which require increased voltage or output voltage less than input voltage. In prior solutions, boost converters may suffer poor efficiency when operating in a fixed high output voltage mode or may lose stability by not properly regulating their output when operating in a step-down voltage mode. To improve efficiency of the boost converter, the present invention uses a 100%-pass mode topology when the battery voltage is high enough to support the diode voltage required for the backlight WLEDs or the camera flash. On the other hand, when the battery voltage drops below the required voltage, then the converter switches automatically to boost mode to generate a sufficient output voltage to drive the diodes to the required current level.

Abstract: An exemplary control apparatus for an energy distribution system includes a connection to an alternating current supply system and a plurality of predetermined loads each having an energy storage capacity and being electrically connected as by a respective switching device to the alternating current supply system for a duration of a half-wave or a whole number times said half-wave. The respective switching devices are supplied electrical energy from the alternating current supply system for a respective control time period within a predetermined common cycle time period. The start and end of the respective control time periods within the common cycle time period are established prior to the start of said common cycle time period to create a substantially constant loading graph. The optimization procedure is based at least one load in lieu of a continuous control time period having at least two non-continuous block time periods of equal total duration.

Abstract: A station-building power supply device is provided in each station building and supplies low-voltage AC power to station building facilities of each station building. There are two mode therein: a regenerative mode in which, when regenerative power regenerated by a train to an overhead wire becomes surplus, the surplus regenerative power supplied from the overhead wire and power supplied from a high-voltage distribution line are used together to supply low-voltage AC power corresponding to an amount of normal power consumption of the station building; and a standby power supply mode in which, when a power outage of the high-voltage distribution line occurs, power supplied from the overhead wire is used to supply low-voltage AC power corresponding to an amount of emergency power of the station building.

Abstract: A method for modelling load in a power grid is provided. The method includes obtaining measurement data from a measurement device in the power grid, identifying one or more voltage adjustment events in the power grid from the measurement data, and generating a load model based on one or more voltage factors computed using the one or more voltage adjustment events.

Abstract: The invention disclosed here is a display system for managing power and security for a plurality of hand-held electronic devices sold to consumers in a retail location. The display includes features that allow power to be supplied to individual devices and security sensors without continuous hard wiring or multi-conductor retractor cables. The display also allows for individual security alarms to be triggered when a theft occurs. Security alarm conditions are preferably triggered via wireless signals.

Abstract: This discloses apparatus including, but not limited to, an all Direct Current (DC) energy transfer circuit, a energy transfer controller, an all-DC energy transfer network, components of use in such circuits, and application apparatus that benefits from including and/or using the all-DC energy transfer device and methods of operating the above in accord with this invention. The application apparatus may include, but are not limited to, a hybrid electric vehicle, an electric vehicle, and/or a solar power device, in particular, a hybrid electric/internal combustion engine automobile.

Abstract: The techniques described herein include for forming a power grid array with multiple power generators coupled to a power distribution unit. The power distribution unit is adapted to monitor operational data from each of the power generators to perform load balancing among the generators and to optimize the performance of the power grid array. A microgrid network is also provided within the power grid array to enable communication among the power distribution unit and the multiple generators in the array. This communication facilitates monitoring of the power grid as well as receiving and storing the operational data from each of the generators in the grid. The microgrid network can then be used to communicate the operational data over one or more connected networks allowing users to remotely access the power grid and to monitor and control the operational characteristics of the generators.

Abstract: Apparatuses and methods for configuring and managing solar panels to form strings of photovoltaic energy generators with improved performance and reduced cost. The photovoltaic energy generators are connected via one or more combined local management units (CLMUs), each having a plurality of direct current converters connected to and configured to receive direct current power from a respective solar panel. A controller unit shared by the CLMU's direct current converters is utilized to separately control the operation of each converter such that the power extracted from the solar panels is maximized. A communications unit coupled with the controller unit is utilized to facilitate communications between the controller unit and a system unit remote from the CLMU to report measurements and receive control signals.

Abstract: The invention relates to a module for locally controlling a photovoltaic panel that includes: first and second terminals (B1, B2) for connecting in series by a single conductor (13) having homologous modules; a first terminal (A1) for connecting the photovoltaic panel, said first terminal being connected to the first terminal (B1) for connecting in series; a switcher (S) that is connected between the second terminal (B2) for connecting in series and a second terminal (A2) connecting the panel; a diode (D0) that is connected between the first and second terminals (B1, B2) for connecting in series; a converter (70) that is provided so as to supply power to the module on the basis of the voltage that is developed by the panel between the first and second terminals (A1, A2) connecting the panel; a sensor (R3) for measuring the current flowing within the single conductor (13); and a means (60, 62) for closing the switcher when the current flowing within the single conductor exceeds a threshold.

Abstract: Systems and methods for harmonic resonance control are described. In some embodiments, a system comprises a first switch-controlled VAR source and a harmonic management block which may each be configured to be coupled to a distribution power network. The first switch-controlled VAR source may comprise a first processor, a voltage compensation component, and a switch. The first processor may be configured to enable the voltage compensation component after a delay by controlling the switch based on first proximate voltage after a duration associated with the delay to adjust voltage volt-ampere reactive. The harmonic management block may be configured to compare a second proximate voltage to at least one resonant threshold to detect potential resonance caused by enablement of the voltage compensation component and to engage based on the comparison the resonance compensation component to manage the potential resonance.

Abstract: The present invention relates to a load management controller for a household electrical installation comprising a pair of electricity supplies, a grid supply and a micro-generator supply, providing electricity to a plurality if sub-circuits. The household electrical installation has means to monitor the amount of electricity being supplied by the micro-generator supply and the amount of electricity being consumed in the household. The load management controller has means to access and use that information to control the supply of electricity to an energy storage sub-circuit to route surplus electricity supplied by the micro-generator to the energy storage sub-circuit. Furthermore, the load management controller can communicate with a remote electricity supplier to control the loads in the household to achieve better grid management and efficiency.

Abstract: The invention relates to a network infrastructure component and a distributed network system for supply purposes comprising a plurality of network infrastructure components, wherein the network infrastructure component comprises at least one contact unit for connection to a further network infrastructure component, and at least one coupling module for coupling a functional group, wherein the network infrastructure component is designed to communicate with a coupled functional group at least at a supply level, wherein the network infrastructure component is designed to communicate with at least one further network infrastructure component at least at the supply level and/or a data level, such that a self-configured network system for linking a plurality of functional groups can be produced with a network of a plurality of network infrastructure components.

Abstract: According to a preferred embodiment of the invention, the system for managing a power system with a plurality of power components that includes power source components and power consumption components includes a central power bus, a plurality of adaptable connectors that each electrically couple to a power component and to the central power bus, and a control processor that receives the state of each power component from the respective adaptable connector and is configured to balance the voltage and current output from each power source component to provide a desired power to a power consumption component based on the received states.

Abstract: Dynamic power flow controllers are provided. A dynamic power flow controller may comprise a transformer and a power converter. The power converter is subject to low voltage stresses and not floated at line voltage. In addition, the power converter is rated at a fraction of the total power controlled. A dynamic power flow controller controls both the real and the reactive power flow between two AC sources having the same frequency. A dynamic power flow controller inserts a voltage with controllable magnitude and phase between two AC sources; thereby effecting control of active and reactive power flows between two AC sources.

Abstract: Systems and methods to balance currents among a plurality of photovoltaic units connected in series. In aspect, a management unit is coupled between a photovoltaic energy production unit and a string of energy production units. The management unit has an energy storage element (e.g., a capacitor) connected to the photovoltaic energy production unit. The management unit further has a switch to selectively couple to the energy storage element and the photovoltaic energy production unit to the string. The management unit allows the current in the string to be larger than the current in the photovoltaic energy production unit.

Abstract: The present invention provides a UPS and a DC-DC converter. An input end of the DC-DC converter is connected to a BUS+, a BUS?, and an N wire. Therefore, an input voltage is relatively low, and devices with low voltage resistance may be selected as devices in the DC-DC converter. Moreover, a load in the DC-DC converter is connected to a switch tube through a inductor rather than be directly connected to the switch tube. Therefore, a high-frequency switch wave on the second switch tube may not affect the load. Accordingly, performance of the load and an anti-electromagnetic interference capability of a whole circuit may be improved. In addition, the DC-DC converter provided in present invention does not have a structure as complicated as that of a dual BUCK topology in the prior art. Therefore, the DC-DC converter, with respect to the dual BUCK topology, has less devices and lower costs.

Abstract: A power unit including multiple generators supplies power to a load or loads that may be variable. The generators can differ, e.g., in generating capacities, rates at which their outputs can be changed, maintenance requirements, and/or different energy-conversion efficiencies. A control unit throttles the generators independently according to a digitally implemented algorithm that may, but need not, use the difference(s) in supplying power to the load. In some cases, the controller regulates monitored power delivered to the load or loads. A power combiner is connected to the outputs of the generators. If desired, a buffer can be used between the generators and the load or loads to provide energy storage that can allow for the load or loads to change at a faster rate than the generators are throttled and for peak loads that temporarily exceed the capacity of the generators.

Abstract: An energy supply network has an n-phase electrical machine where n?1 and a controllable first energy reservoir which serves to control and supply electrical energy to the electrical machine. The first energy reservoir has n parallel energy supply branches that each have at least two energy reservoir modules, connected in series, that each encompass at least one electrical energy reservoir cell having an associated controllable coupling unit and are connected on the one hand to a reference bus, and on the other hand to a respective phase of the electrical machine. As a function of control signals, the coupling units either bypass the respectively associated energy reservoir cells or switch the respectively associated energy reservoir cells into the energy supply branch.

Abstract: A method of dynamic power management of a mobile device. The method includes monitoring at least one load to determine when at least one of the loads will become active or inactive, determining a minimum required output voltage level to be provided by a single voltage converter based on voltage level requirements of the at least one load that will become active or inactive, converting an input voltage level via the voltage converter to provide the minimum required output voltage level to the output power port in advance of the at least one load becoming active or after the at least one load becomes inactive, monitoring the input voltage level, determining whether the input voltage level is below a first threshold, and when the input voltage level is below the first threshold, reducing the output voltage level provided by the single voltage converter.

Abstract: A power system includes one or more notification circuits for powering notification devices, a backup power source, and a plurality of primary power supplies. The primary power supplies are configured to provide a combined current to the notification circuits. Each primary power supply regulates its output current to equal a highest output current provided by one of the primary power supplies so that each contributes approximately the same current to the load. The primary power supplies also include boost regulator circuits for boosting the voltage of the backup power supply.