Abstract: An electrocautery surgical device comprising a battery source and radio-frequency signal generating circuitry electrically coupled to the battery source and operable to deliver power.

Abstract: A method of adding a power feed to electrical systems includes coupling a set of input lines to a power source such that the input lines are connected to at least one phase of AC power from the power source, and coupling a set of backfeed lines to an output receptacle in a power distribution unit. The output receptacle may be connected in parallel with at least one other output receptacle that is supplying primary power to systems in the data center. The set of backfeed lines and the set of input lines may be tested to determine a match between a pair of lines in the set of backfeed lines and a pair of lines in the set of input lines. Determining the match may include matching the phase of the pair of backfeed lines with the phase of the pair of input lines.

Abstract: Various embodiments of the present technology provide methods for determining a status of power supplies to a server system and dynamically managing an uninterruptible power system (UPS) of the server system between an off-line mode and an on-line mode based upon the status of the power supplies. The UPS requires a minimum standby power during the off-line mode while requires no switch time to continuously supply power to loads of the server system during the on-line mode. Some embodiments determine a status of an AC input power to a server system and, in response to detecting an abnormal condition associated with the AC input power, generate a power warning signal. The power warning signal can cause an UPS of the server system to be switched from an off-line mode to an on-line mode.

Abstract: A system for providing a first voltage generated by a main supply and a second voltage generated by a battery to an integrated circuit (IC) includes supply-selection, control logic and switching circuits. The supply-selection circuit includes first, second, and third transistors. The switching circuit includes fourth and fifth transistors that supply the first and second voltages to the IC when switched on. The supply-selection circuit selects and provides the higher of the first and second voltages to body terminals of the fourth and fifth transistors for maintaining required body-bias voltage conditions. The control logic circuit generates a first control signal as long as the first voltage is within a predetermined range for keeping the fourth transistor switched on and a second control signal when the first voltage is not within the predetermined range for switching on the fifth transistor to supply the second voltage.

Abstract: Various embodiments for managing assets in a data center device rack include: establishing a data connection between a cabinet level controller and at least one primary power distribution unit (PDU); using a first electrical outlet on the primary PDU to establish an electrical connection between the primary PDU an electrical asset in a data center equipment rack; using a first asset interface connector on the cabinet level controller to establish a data connection between the cabinet level controller and the electrical asset in the data center equipment rack, the first electrical outlet and the first asset interface connector being in horizontal alignment; using a router integrated into the cabinet level controller to connect the cabinet level controller to a wide area Internet Protocol (IP) network; and using the router to establish a single IP address corresponding to a plurality of electrical assets in the data center equipment rack.

Abstract: A selectivity module for dividing a load current in an installation system includes a housing, a plurality of branches in the housing, a plurality of switching devices, and a control unit. Each of the plurality of switching devices is configured for switching a branch current on and off in a corresponding one of the plurality of branches. The plurality of switching devices serves to output information about corresponding switching states. The control unit is connected to the plurality of switching devices and configured to output a status signal as a function of the output information from the plurality of switching devices. The output information relating to the individual switching states of all of the plurality of switching devices is contained in the status signal in a serial encoded form.

Abstract: Systems and methods of controlling an uninterruptible power supply are provided. The uninterruptible power supply includes an input configured to receive input power, an output, a power conversion circuit coupled with the input and the output, and a controller coupled with the power conversion circuit. The power conversion circuit includes an inverter, which includes a low pass filter. The low pass filter includes an inductor, and the controller is configured to provide control signals to the inverter such that a first current, measured at the inductor, generates a second current, measured at the output, where the first current has a first polarity and the second current having a second polarity, and the first polarity is either zero or the same polarity as the second polarity.

Abstract: In an embodiment, a power converter includes: a plurality of power amplifier units, each having: a plurality of slice each with a power conversion module including an AC/DC/AC converter; a mains controller to control the plurality of slices; and a feedback conditioning system coupled to the mains controller; a plurality of input contactors and a plurality of output contactors via which each of the plurality of power amplifier units is to couple between a transformer and a load; and a master controller coupled to the plurality of power amplifier units.

Abstract: Aspects of the present disclosure generally relate to systems and methods for managing and monitoring a plurality of emergency power supply systems (EPSS's) at a facility via an emergency power management system (EPMS). The EPMS generally comprises EPSS equipment, a management computer system for managing, monitoring, and testing the operational characteristics of the EPSS equipment, and a plurality of interface modules for providing unified communication capabilities between the management computer system and the EPSS equipment. Additional aspects relate to methods for easily and efficiently creating and installing an EPMS at a facility. Further aspects are directed to providing predictive analyzes related to the EPSS equipment. Also, aspects of the present disclosure relate to normalizing EPSS equipment information across varying vendors, makes, and models of equipment so as to provide a unified view of all equipment across a given facility.

Abstract: A portable generator system provides power to a load source including an engine and a generator. The engine drives the generator to provide a generator alternating current (AC) electrical power output. An energy storage system (ESS) provides an ESS direct current (DC) electrical power output. A first inverter is connected to the generator for receiving the generator AC electrical power output and for providing a DC power output. A second inverter is connected to the first inverter and the ESS for receiving the DC power output from the first inverter and the ESS DC electrical power output for providing an AC power output. A first power mode includes the generator maintaining a first generator power output level corresponding to a specified power requirement of a load source, and the ESS providing an additional first ESS power output level for satisfying the specified power requirement of the load source.

Abstract: A power loss protection integrated circuit includes a current switch circuit (eFuse), a VIN terminal, a VOUT terminal, a buck/boost controller, and a storage capacitor terminal STR. The controller is adapted to work: 1) as a boost to take a low voltage from the VOUT terminal and to output a larger charging voltage onto the STR terminal, or 2) as a buck to take a higher voltage from the STR terminal and to buck it down to a lower voltage required on the VOUT terminal. The current switch circuit outputs a digital undervoltage signal (UV) and a digital high current signal (HC). These signals are communicated on-chip to the controller. Asserting UV causes the converter to begin operating in the buck mode. Asserting HC prevents the converter from operating in the boost mode.

Abstract: A motherboard with backup power providing an output voltage to at least one computer information apparatus and including a first power connection unit and an Uninterruptible Power Supply (UPS) is provided. The first power connection unit is configured to receive DC power. The DC power is provided by a power supply. The UPS provides the output voltage and detects the DC power. When the DC power is stable, the UPS provides the DC power as the output voltage. When the DC power is unstable, the UPS provides battery power as the output voltage.

Abstract: A server cooling system includes: a flex-switch with one or more flexible building bridges; one or more utility farms coupled with the flex-switch; a power distribution unit operably connected to the flex-switch; and a server POD including one or more racks operably connected to the power distribution unit. The flex-switch is configurable to include additional utility farms, one or more generator farms, and one or more UPS farms.

Abstract: An electronic medium with an integrated circuit includes a power feeding terminal pair including a first power feeding terminal and a second power feeding terminal, an integrated circuit including at least one first rectifying circuit, and a second rectifying circuit that is separate from the integrated circuit, wherein the first rectifying circuit and the second rectifying circuit are connected in series between the first power feeding terminal and the second power feeding terminal.

Abstract: Managing power feeds includes monitoring a waveform of a high-voltage power feed supplied to an electrical load to detect potential interruption of the high-voltage power feed and switching to another power feed to supply power to the electrical load in response to identifying the waveform pattern. Monitoring a waveform includes processing the waveform to determine if one or more waveform patterns are present in the waveform. A waveform pattern indicates, by its presence in a waveform of a power feed, a power event associated with the power feed, and some waveform patterns indicate potential interruption of the power feed. Switching to another power feed in response to determining potential interruption of the power feed based on waveform monitoring enables an uninterrupted power supply.

Abstract: A handheld communication device includes a screen to receive input from and provide graphical output to a user, a processor to execute machine readable instructions and control operation of the device, a computer readable medium to store the machine readable instructions, an energy storage device to power the screen, processor, and computer readable medium, and a substantially planar electrically conductive member positioned between the screen, processor, and computer readable medium on one hand and the energy storage device on the other. The conductive member engages a first side of the energy storage device and comprises a flexible tab extending from the first side of the energy storage device, around a side of the energy storage device, and to a second terminal on an opposing second side of the energy storage device.

Abstract: An automatic transfer switch (ATS) is described that includes a multi-structure of relays that together provide proper spacing, within the ATS, between a first power feed and a second power feed. A monitor circuit is also described that monitors output ports of relays in the first stage of the multi-stage structure and detects that there is or is not proper spacing between the first power feed and the second power feed, within the ATS.

Abstract: A generator system may include redundant control. The generator system may include any combination of redundant controllers, redundant communication paths, or other redundant control. A generator system may include an electrical bus, a first generator controller, and the second generator controller. The first generator controller may control a first generator breaker for connecting a first generator to the electrical bus and configured to control an external breaker for selectively connecting the electrical bus to an external source. The second generator controller may control a second generator breaker for connecting a second generator to the common bus and configured to control the external breaker for selectively connecting the electrical bus to the external source.

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 or strings of panels for DC or AC use, perhaps for transfer to a power grid 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, 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 and pairs of photovoltaic power shunt switch elements.

Abstract: According to one aspect, embodiments of the invention provide a method of operating a UPS system, the method comprising receiving, at an input of a first UPS, input power from a power source, generating, with a first analysis circuit, a first signal indicative of a characteristic of the input power, receiving, at the analysis circuit, a second signal from a second analysis circuit of a device coupled to the power source, the second signal indicative of a characteristic of input power received at the second analysis circuit, analyzing with the analysis circuitry, the first signal and the second signal, determining, whether an improper wiring condition exists at the input, in response to a determination that an improper wiring condition does not exist, providing output power to an output of the first UPS, and in response to a determination that an improper wiring condition does exist, de-energizing the first UPS.

Abstract: Methods and systems supply uninterrupted power to a load using a backup battery module. A driver circuit connects the load and the backup battery module such that the operational range of the load voltage is narrower than the operational range of the battery voltage. Different charging and discharging paths of the driver circuit may be used to limit the DC bus voltage to values lower than the battery voltage. The proposed systems and methods can increase power efficiency and decrease the cost of power supply and conversion operations.

Abstract: A multidirectional electrical power protection system, includes a first power supply and at least a second power supply with each supply being configured for supplying power to a main bus circuit; a first load bus electrically connected to the first power supply and at least the second power supply, at least a second load bus electrically coupled with each of the first power supply and at least the second power supply, the first load bus and the second load bus configured for energizing devices connected to the respective first and second load bus; and at least one smart contactor in coupled with the main bus circuit, the at least one smart contactor being configured for sensing a first current flowing in a first direction through the main bus circuit and for sensing a second current flowing in a second direction through the main bus circuit.

Abstract: An electric power converter includes a power failure detection circuit for detecting a power failure state of each power supply system, a first switch having contact points connected to the power supply systems and one output terminal and, when the power failure detection circuit detects a power failure in at least one power supply system, switches to connect to the output terminal of the contact point connected to one of the other power supply systems, a second switch having a charging circuit to inhibit an inrush current from the power supply systems and one input terminal connected to the output terminal of the first switch and switches to connect the input terminal to a contact point on an input side of the charging circuit for a predetermined duration in synchronization with the switching among the power supply systems by the first switch unit, and an electric power conversion circuit.

Abstract: A power conversion device is disclosed herein. The power conversion device includes an AC-DC conversion unit, a switching unit and a bypass circuit. The AC-DC conversion unit is configured to receive an AC input voltage via a power input terminal, and output a DC output voltage to a power output terminal according to the AC input voltage. The switching unit is configured to be switched off according to the AC input voltage received from the power input terminal, and to be switched on according to a DC input voltage received from the power input terminal. The bypass circuit is configured to receive the DC input voltage via the switching unit, and output the DC output voltage to the power output terminal according to the DC input voltage.

Abstract: A system and method for providing power to a vehicle is disclosed. The system can include a plurality of parallel module converter for prioritizing and allocating each electrical load to one or more parallel module converter modules. The centralization of power distribution can enable the reduction of components. The system can enable fewer power controllers, filters, and other components to be used, saving weight and time. The system can enable the controllers, inverters, and filters, among other things, to be utilized at a higher level reducing unnecessary redundancy. The system can enable the use of a single input EMI filter, for example, reducing the number of filters in the system significantly. Methods for designing EMI filters for each electrical load are also disclosed.

Abstract: A device for keeping a computer of a motor vehicle in a standby mode and for switching over to an active mode, with at least one electrical switch connected so that a change of an initial state of the switch constitutes an event that triggers the switching of the computer, and an electrical circuit incorporating each electrical switch, and an electrical power supply designed to exhibit two states: a power supply conducting steady state of each electrical switch wherein no power is consumed, obtained in the absence of a signal on its control input or upon the reception of a control signal of logic level “0”, and a blocked state wherein power is consumed, obtained in the presence of a control signal of logic level “1” on its control input.

Abstract: A UPS with an adjustable user interface module comprises a housing having a front plane and a module configured to fit inside and secured by the housing. The module includes a body having a front face, and the module is configured to tilt within the housing such that the front face of the module can be positioned at various angles relative to the front plane of the housing.

Abstract: According to one aspect, embodiments of the invention provide a method of operating a UPS system having a plurality of UPS's, the method comprising powering on the UPS system, assigning each one of the plurality of UPS's a unique identifier, calculating a master priority index for each one of the plurality of UPS's based on the unique identifier of each one of the plurality of UPS's, and based on the master priority index of each one of the plurality of UPS's, configuring each one of the plurality of UPS's to operate in one of a master mode of operation and a controlled mode of operation.

Abstract: A circuit arrangement has a bidirectional AC/DC converter connected to a first side of a DC/DC converter at a DC side of the AC/DC converter via first electric switch. The AC/DC converter is connected to a second side of the DC/DC converter at the DC side of the AC/DC converter via a second electric switch. The first side of the DC/DC converter is connected to a third electric switch and can be connected to an energy storing device via said switch. The second side of the DC/DC converter is connected to a fourth electric switch and can be connected to an energy generating device via said switch. The AC/DC converter can be connected to the electric supply grid at the AC side of the AC/DC converter. A control device controls the switches and the converters.

Abstract: An apparatus and method for backfeed detection in, and control of, an uninterruptible power system is disclosed. An adaptive controller in an uninterruptible power system enables delivery of power from a second, backup, power source, to loads connected to an output of the system, when a first, primary, input source is detected to be in a fault condition. Subsequent to enabling the second power source, and within a time interval that is less than one AC period following the detection of the input fault, the controller may sense and measure a backfeed of energy from the second source to the first source and may adapt a subsequent fault response based upon the measurement of the backfeed. Adapting the subsequent response may comprise adapting a response to a fault at the output. The subsequent response may comprise disabling or enabling delivery of energy from the second source.

Abstract: Provided is a power supply state monitoring device and so on which is capable of notifying a user of the fact that there is a problem with an AC cord and the fact that a power supply apparatus itself is not mounted separately.

Abstract: Provided are a bypass type 220V grid voltage sag prevention device and a control method therefor. The bypass type 220V grid voltage sag prevention device comprises an AC-to-DC energy storage unit, a Single Chip Microcomputer (SCM) control and display unit, and an inverter output unit. The AC-to-DC energy storage unit comprises a rectifier circuit, an energy storage control circuit and a quick tank circuit; the SCM control and display unit comprises an SCM, a DC step-down module circuit and an energy storage voltage detecting circuit; and the inverter output unit comprises a high-frequency PWM generating circuit, a high-frequency transformer output circuit, a transformer output full-bridge rectifier circuit, a PWM generating circuit, a PWM driving and full-bridge inverter circuit, a 220V grid zero-cross point detecting circuit, a 220V grid voltage detecting circuit, a 220V grid and inversion AC converting circuit, and a signal interface circuit.

Abstract: A power safety circuit comprises a power sense terminal; an output terminal; an output driver unit connected to the output terminal; an input terminal connectable to receive a first power from a power source and arranged to supply the first power to the output driver unit; and a power detection unit arranged to detect a state of the input terminal and provide a power sense signal to the power sense terminal; wherein the power sense terminal is arranged to supply a second power to the output driver unit when the power sense signal indicates a level of the first power below a minimum level for driving the output terminal. An integrated circuit device comprises at least one power safety circuit. A safety critical system comprises at least one integrated circuit device with at least one power safety circuit.

Abstract: A multicolor signal arrangement has a multicolor LED, a microcontroller, and an input interface, the arrangement being configured such that the input interface receives pulse width-modulated control signals. The multicolor LED is operated in a first operating mode when the input interface receives a first control signal, and the multicolor LED is operated in a second operating mode when the input interface receives a second control signal. The multicolor signal arrangement has an RFID device, and the multicolor signal arrangement is configured such that the RFID device receives operating mode definition information, the operating mode definition information is transmitted to the microcontroller, and the microcontroller defines the operating modes dependent on the operating mode definition information. The invention further relates to a method for defining operating modes of such a multicolor signal arrangement and to a system having such a multicolor signal arrangement and an RFID transmission device.

Abstract: The present invention provides an intelligent calibration system for backup-power automatic switching devices, including a power supply module, a control module for logic controls, a voltage output module and a current output module for outputting simulated voltage and current, a signal feedback module for sampling outputted voltage and current signals, a simulated circuit-breaker group, an auxiliary relay, a USB interface for communication, a keyboard for information input, a display module for information interaction and real-time panel presentation, an interface module to facilitate plug-in wires, an indicator light for indicating operation status and a computer for controlling the testing globally. The present invention facilitates easy and fast wiring, and conveniently displays operation interface and related information. The operation is intuitive and simple, overall test efficiency is improved.

Abstract: The present invention relates to an AC LED driving circuit that can greatly improve flicker-free characteristics and implement an excellent power factor. The AC LED driving circuit according to the present invention includes an LED lighting unit connected to an output terminal of a power supply unit, a current channel switching unit connected to an output terminal of the LED lighting unit to form a current supply channel for the LED lighting unit, a voltage charging unit connected in parallel with a connection line between the power supply unit and the LED lighting unit and configured to charge a voltage from the power supply unit, and have a switching function for the LED lighting unit to selectively supply a charged voltage to the LED lighting unit, and a charged voltage switching control unit for controlling a switching function of the voltage charging unit.

Abstract: An auxiliary power control system for enabling a software command that a management controller sends to the power supply to shut down auxiliary power. Such a power control system enables an AC cycle without needing to physically remove an AC power cord and provides additional power savings when a system is not in use. In certain embodiments, the auxiliary power control system includes a paradigm of a main power state, an auxiliary power state and a sub-auxiliary state. In this system many of the power states and wake vents apply to the auxiliary power state in addition to the main power state.

Abstract: The device includes a set of electronic switches having a common structure and forming modules for converting electrical energy and a power DC bus onto which the modules are connected in parallel. These modules are controlled by a control circuit so as to supply electrical energy originating from external sources of energy over the power DC bus or to extract electrical energy over this bus to recharge batteries. The device includes at least one AC-DC conversion module configured for carrying out the rectification of an AC line supply and for powering the DC bus, a DC-DC conversion module configured for charging a user battery from the DC bus and a DC-DC conversion module configured for alternatively allowing the recharging of a storage battery from the DC bus or the discharge of the same battery over the latter. The various modules are mounted onto an accommodation structure forming a heat dissipator.

Abstract: A power supply unit includes: a relay that includes a first input terminal to which primary alternating-current power is input and a second input terminal to which secondary alternating-current power is input, and outputs one of the primary alternating-current power and the secondary alternating-current power; a first power conversion unit that is coupled to an output terminal of the relay, and converts alternating-current power output from the relay, into direct-current power; a second power conversion unit that is coupled to an output side of the first power conversion unit and converts output power of the first power conversion unit into direct-current power of a predetermined voltage; a power output terminal that outputs the direct-current power converted by the second power conversion unit; and a control unit that couples the first input terminal to the output terminal or couples the second input terminal to the output terminal.

Abstract: For each of consumers, a connection control apparatus is provided that includes an opening/closing device capable of connecting or disconnecting an electric power system and a consumer, that, when a power outage occurs in the electric power system, disconnects the electric power system and the consumer from each other by the opening/closing device at a command from an outage management apparatus or the like, and that connects the electric power system and the consumer to each other by the opening/closing device upon receiving a command from the outage management apparatus or the like at the time of restoration from the power outage. A power supply control apparatus supplies electric power from energy provision equipment to electrical appliances during a power outage in the electric power system.

Abstract: An automatic transfer switch configured for connection to a non-traditional, full-time or intermittent power source, such as a wind turbine or solar panel, selectively connects the non-traditional power source as a primary power source and a utility-derived power source as a secondary power source. The intermittent power source includes an energy storage device, such as a bank of DC batteries, to supplement power delivery during periods of low energy production. The power is provided to an AC load via a DC-to-AC inverter. The transfer switch includes an input to monitor the voltage level on the energy storage device and will switch from the primary power source to the utility power source when the voltage level on the energy storage device drops below a preset level. Thus, a loading condition that exceeds the rating of the inverter will not fault the inverter or limit the power available to the loads.

Abstract: A battery pack includes first and second terminals, a battery unit electrically connected between the first and second terminals, the battery unit being configured to receive charging power, and being configured to output discharging power, and a power converter electrically coupled between the first terminal and the battery unit, the power converter being configured to convert the charging power to have a charging voltage corresponding to the battery unit, wherein the first and second terminals are configured to be electrically coupled to a generator and a starter motor.

Abstract: In a voltage adjusting apparatus connected in series to a system, an output of an AC/DC converter thereof is reduced. The apparatus includes a second serial transformer having a primary side connected in series to a secondary side of a first serial transformer having a primary side connected in series between a power supply and a load and to a secondary side of a parallel transformer having a primary side connected in parallel between the power supply and the load; and a first AC/DC converter having an AC side connected to a secondary side of the second serial transformer. The first AC/DC converter has a switching element connected between an AC terminal and a DC terminal, an antiparallel diode, and a capacitor.

Abstract: A bicycle power supply system comprises a first power supply, a second power supply, and a power supply level sensing structure. The power supply level sensing structure is operatively coupled to the first and second power supplies. The first and second power supplies are selectively electrically coupled with electrical power being supplied from the second power supply to the first power supply while a first power supply level is detected by the power supply level sensing structure to be below a first prescribed power threshold, and with electrical power being supplied from the first power supply to the second power supply while a second power supply level is detected by the power supply level sensing structure to be below a second prescribed power threshold.

Abstract: The present disclosure, in one embodiment, relates to an electric flameless candle, comprising a body configured in shape and size to simulate a true flame candle. The electric flameless candle further comprising a light source operably connected to the body and positioned to be generally protruding from an exterior surface of the body, the light source comprising a plurality of illuminators electrically operated to illuminate in a way that simulates the movement of a real candle's flame.

Abstract: An apparatus for monitoring a heating, ventilation, or air conditioning (HVAC) system includes an indoor unit monitor module electrically connected to a current sensor and first and second refrigerant temperature sensors. The current sensor generates a first current signal based on aggregate current consumed by components of an indoor unit of the HVAC system. The refrigerant temperature sensors generate first and second refrigerant temperature signals, respectively, based on measured temperatures of refrigerant circulating within the HVAC system. The indoor unit monitor module receives, from a secondary monitoring module, a second current signal based on aggregate current consumed by components of an outdoor unit of the HVAC system. The indoor unit monitor module transmits data to a remote server to assess whether a failure has occurred or is likely to occur in the components of the HVAC system. The data is based on the current signals and the refrigerant temperature signals.

Abstract: In embodiments of the present invention improved capabilities are described for providing intelligent power control in response to an external power interruption, causing a processor is in an electrical fixture to interrogate an external power control switch to gain an understanding of the switch's state, where prior to the external power interruption the electrical fixture may be powered by external power and where external power may be connected and disconnected by a user of the switch. In the event that the switch's state is determined to be such that it would normally pass power to the electrical fixture, the processor causes the electrical fixture to operate using a backup power supply. In the event that the switch's state is determined to be such that it would normally not pass power to the electrical fixture, the processor causes the electrical fixture to act as if the user of the switch has intentionally removed power.

Abstract: A power supply system having a power supply cut-off function in an emergency is provided. The present system includes a power supply device for receiving and supplying external input power to a device for power supply, a remote controller for controlling an operation of the power supply device according to a remote control signal from a remote place, an uninterruptible power supply device for supplying operation power to the remote controller, a first line switch for, when a power switch is turned on, supplying the external input power to the power supply device and the uninterruptible power supply device, and a second line switch disposed between the power supply device and the first line switch and cutting off the external input power supplied to the power supply device via the first line switch when the uninterruptible power supply device does not output the power.

Abstract: The present application relates to a wireless power supply device and wireless power transmission control in an electronic device capable of receiving wireless power. According to an embodiment of the present application, the electronic device capable of receiving wireless power comprises a communication unit which receives power information including at least one piece of electricity bill information and power demand information. Also, the electronic device comprises a wireless power receiving unit which receives wireless power wirelessly supplied from a wireless power supply device, and a power converting unit which converts the wireless power received into power that can be used in the electronic device. By using various embodiments suggested by the present application, use of power wirelessly supplied can be efficiently controlled, and accordingly, electric power can be economically and efficiently used.

Abstract: Disclosed is a method for voltage dip compensation of inverter, the method including reducing an output frequency of an inverter to obtain a regenerative energy when it is determined that power failure has occurred during the inverter operation, adjusting increase/decrease of inverter output frequency in response to size of exceeding current and voltage based on an output current and DC-link voltage of the inverter, increasing the inverter output frequency in order to prevent excessive current flow when power restoration occurs at a power failure state, and returning to a speed prior to the momentary voltage dip by gradually increasing the inverter output frequency in a state where the inverter output frequency does not exceed an over-current limit by monitoring the inverter output frequency.