Abstract: A thermal support may receive one or more power electronic circuits. The support may aid in removing heat from the circuits through fluid circulating through the support. Power electronic circuits are thermally matched, such as between component layers and between the circuits and the support. The support may form a shield from both external EMI/RFI and from interference generated by operation of the power electronic circuits. Features may be provided to permit and enhance connection of the circuitry to external circuitry, such as improved terminal configurations. Modular units may be assembled that may be coupled to electronic circuitry via plug-in arrangements or through interface with a backplane or similar mounting and interconnecting structures.

Abstract: The present invention is directed to a carrying case with an integrated power supply system for providing power to multiple electronic devices from a single power source. In addition to allowing quick access and storage of various electronic devices, the carrying case also allows the individual electronic devices to be easily connected to the power source and eliminates the need to carry multiple charging cords. In certain embodiments, the power supply system further includes an additional battery or other power source, which increases the runtime of connected electronic devices and reduces the need to carry additional individual batteries for the individual devices. With different connectors on the input to the power system, different AC or DC power sources may be utilized. Different connectors can also be used to provide power to different electronic devices.

Abstract: A remote power feeding method allowing efficient remote power feeding into a network termination device in the event of a commercial power failure at a subscriber site is disclosed. When the commercial power failure occurs, a power failure signal is transmitted from the subscriber-side network termination device to the central office-side line termination device. The central office-side line termination device, when receiving the power failure signal, starts DC power feeding to the subscriber-side network termination device via the subscriber line. During the power failure, only voice communication is permitted using previously selected good channels.

Abstract: An on-vehicle charger is provided to connect with a cigarette-lighting receptacle for supplying a DC power from an automotive to a circuit board. The input power is shunted, converted, regulated, and outputted to a USB jack and a FireWire jack respectively to serve as a FireWire power source for iPod.

Abstract: An AC/DC adapter is provided either by incorporating an AC to DC converter in a multiple outlet wall adapter which includes at least one standard AC plug receptacle and at least one DC receptacle. Electronic devices which require DC power can be plugged into to the AC/DC adapter by a power cord having a universal DC plug at one end and a connector or plug specific to the make and/or model of the electronic device at the other end. The universal DC plug corresponds with the DC receptacle provided on the AC/DC adapter. The adapter may be formed as one integrated unit or as an assembly which includes an AC module and a DC module. In the assembly, the AC and DC modules are constructed so that they can be fitted together and used as one conveniently sized unit, but module can be used independently of the other. The AC module plugs into one outlet receptacle of a wall outlet and includes the at least one AC plug receptacle.

Abstract: In a power plug capable of preventing twists of a power supply line and turning on/off power supplied to a load device according to a rotation of a rotational unit by dividing the power plug itself into a fixed unit and the rotational unit, the power plug includes the fixed unit at which prongs and a connection terminal connected to the prongs are installed, a rotational unit rotationally installed to the upper portion of the fixed unit and supplying power to the load device, a power on/off unit placed between the fixed unit and the rotational unit and connecting/disconnecting a power supply to the load device according to the rotation of the rotational unit, and a locking unit installed to the upper portion of the rotational unit and locking the rotation of the rotational unit.

Abstract: AC module makers must prepare two types of AC modules for the 100-V and 200-V outputs only for domestic supply. For foreign countries, the makers must manufacture AC modules compatible with more system voltages. To solve these problems, the control circuit of an AC module controls the operation of an inverter circuit and/or the transformation ratio of a transforming circuit, and ON/OFF-controls a switch on the basis of the system voltage and connection state of an electric power system.

Abstract: A modular electronic power supply interconnecting device has a plurality of stackable modules for converting an AC input voltage into DC output voltages of various magnitudes. A base module receives the input power and generates a first output power. A first adjacent module receives transfer power from the base module and generates a second output power. A second adjacent module receives transfer power from the base module and generates a third output power. The base module and the first and second adjacent modules are releasably attached and electrically connected. The device can be used to covert AC input power into DC power of 5 volts, 12 volts, 19 volts or any other desired magnitude.

Abstract: An AC/DC adaptor module for preventing from inducing noises is provided. The adaptor for transforming an AC power from a socket having a grounded terminal into a DC power and providing an equipment having an input terminal, a negative terminal and a grounded piece with the DC power, includes a transformer having a positive output terminal and a negative output terminal for being electrically connected to the positive input terminal and the negative input terminal of the equipment respectively, wherein the negative input terminal of the equipment is connected to the grounded piece of the equipment, and a grounded wire having a first terminal electrically connected to the grounded piece of the equipment and a second terminal connected to the grounded terminal of the socket.

Abstract: A power supply device including an inner assembly body that contains a power supply circuit and primary-side and secondary-side connecting elements which are electrically connected to the power supply circuit, the inner assembly being processed by insert-molding so that the outer surface of the inner assembly body is covered by a synthetic resin that is integral with the inner assembly body. The inner assembly body can be obtained by an inner case formed by an inner case half-body and an inner case cover so as to have a hollow space inside having the power supply circuit, and the primary-side and secondary-side connecting element are sealed in or integrally attached to this inner case.

Abstract: A power supply with DC surge and spike protection having additional, optional power conditioning and control functions such as low voltage protection, electro mechanical interferences(EMI) protection and radio frequency interference(RFI) protection. The device is for attachment to vehicular electrical systems for protecting, conditioning or controlling the input power to electrical devices such as computers, audio and video systems, PDA's, wireless phones, and other electronic products. The power supply includes a housing having a male cigarette lighter plug inserted into a vehicular cigarette lighter plug or DC power outlet, electrical circuitry in the housing and one or more female power receptacles into which the powered electrical devices DC connectors are inserted.

Abstract: A power supply apparatus is provided. The power supply apparatus includes a housing, an AC inlet for accepting an AC power supply, a circuit board for converting the AC power supply into a DC power supply, a power cord for transferring the DC power supply to an electrical appliance and having a first end electrically connected to the circuit board, a first plate detachably connected to a first surface of the housing, a second plate detachably connected to a second surface of the housing, the second plate being opposite to the first plate, and a locking element disposed in the vicinity of a second end of the power cord, wherein the power cord is wound around the housing and between the first plate and the second plate so as to secure the power cord for storage.

Abstract: An electric adapter system includes an adapter including a circuit connected between input and output connection devices respectively connectable with an external power source and a power consuming device. The output connection device is mateable with a connector forming an output member for engaging the power consuming device. The circuit includes a voltage level control device and a feedback device. The voltage level control device supplies an output voltage to the output connection device via positive and negative power terminals. The feedback device includes a plurality of voltage selection lines each having a different electric resistance whereby by selectively connecting one of the voltage selection lines to the negative power terminal, a feedback signal is generated by the feedback device and applied to the voltage level control device for changing the voltage level of the output voltage of the voltage level control device.

Abstract: A power supply with DC surge and spike protection having additional, optional power conditioning and control functions such as low voltage protection, electro mechanical interferences(EMI) protection and radio frequency interference(RFI) protection. The device is for attachment to vehicular electrical systems for protecting, conditioning or controlling the input power to electrical devices such as computers, audio and video systems, PDA's, wireless phones, and other electronic products.

Abstract: An electrical power strip for making power available from a vehicular DC power system to a vehicle accessory. The power strip includes at least one polarized receptacle and a conductor. The receptacle includes a slot and a positive contact aligned with the slot. The conductor includes a first end connected to the positive contact and a second end connectable to a positive terminal of the vehicular DC power system. The slot includes at least three extensions each oriented at substantially equal degrees apart from adjacent extensions. A polarized plug for use with a DC powered vehicle accessory. The polarized plug includes an insulating plug body and a prong mounted to the insulating plug body. The prong has at least three wings each oriented at substantially equal degrees apart from adjacent wings.

Abstract: An adapter generates a DC electric power output and an AC electric power output according to an AC electric power input. The adapter has a first housing, at least a plug positioned on the first housing for receiving the AC electric power input, a first socket positioned on the first housing being electrically connected to the plug for outputting the AC electric power output, a second housing movably connected to the first housing, a transformer electrically connected to the plug for converting the AC electric power input into the DC electric power output, and a second socket positioned on the second housing being electrically connected to the transformer for outputting the DC electric power output. The second housing can pivot on the first housing according to an axle, and the first socket is covered by the second housing when the second housing is rotated to a predetermined position.

Abstract: The present invention provides a universal serial bus (USB) voltage transformer, which comprises a main body, a transformer circuit unit, and several connectors. The transformer circuit unit is disposed in or at the inside of the main body. The connectors are electrically connected to the transformer circuit unit directly or via a connection cable. A USB voltage transformer having travel charging function is thus formed. The USB voltage transformer of the present invention can simultaneously charge several portable electronic devices like mobile phones, personal digital assistants, electronic translators, and small cameras.

Abstract: A power supply apparatus is provide. The power supply apparatus includes a housing, an AC inlet for accepting an AC power supply, a circuit board for converting the AC power supply into a DC power supply, a power cord for transferring the DC power supply to an electrical appliance and having a first end electrically connected to the circuit board, a first plate detachably connected to a first surface of the housing, a second plate detachably connected to a second surface of the housing, the second plate being opposite to the first plate, and a locking element disposed in the vicinity of a second end of the power cord, wherein the power cord is wound around the housing and between the first plate and the second plate to as to secure the power cord for storage.

Abstract: A power adapter is disclosed. The power adapter comprises a housing having an AC inlet, a circuit board installed in the housing and connected with the AC inlet for converting AC to DC, a power cord with one end thereof connected with the circuit board, and a power cord take-up device having a bottom plate and a centered projecting member, wherein a top of the centered projecting member is connected with the housing, so as to wind the power cord around the centered projecting member to receive the power cord in the power cord take-up device.

Abstract: A power management system is interfaced with both a local utility power source and a remotely powered span, and monitors the power availability for and requirements of DDS terminal equipment. Upon detecting that local utility power is insufficient to operate the terminal equipment, a power limited converter derives power from the phone line. The span power drawn is limited to a fixed value that prevents the line from collapsing. An auxiliary capacitor stores energy from either local utility power or the span, to provide for periods of extended power operation (including ringing the phone).

Abstract: Systems, methods, and apparatuses for isolating an electrical problem in a power pack include a system in accordance with various embodiments of the invention. The system includes a power pack. The power pack includes an input cord including at least a first indicator, wherein the input cord is adapted to receive electrical current from an electrical source, and further adapted to transmit the electrical current to the power pack, and wherein the first indicator indicates when the input cord transmits electrical current from the electrical source. The power pack also includes a housing including at least a second indicator, wherein the second indicator indicates when the power pack receives electrical current from the input cord.

Abstract: A stored energy system is provided for delivering AC electrical power to a load. This system includes a single housing containing within a battery bank for storing DC power, and an inverter for receiving either DC power or AC power and converting DC power to AC power. The stored electrical system includes five circuit breakers mounted on the outside surface of the housing. Twist lock plugs are connected to each of the circuit breakers for removably connecting input power sources and output loads with the circuit breakers. A first circuit breaker is connected to a solar power source. A second circuit breaker is connected to a wind generator. A third circuit breaker is connected to a generator for generating AC power. A fourth circuit breaker is connected to a utility supplying AC power. A fifth circuit breaker is connected to the outside AC power load.

Abstract: An electrical adapter is composed of a body and a changeable plug. The body has a housing being composed of a first semi-housing having a first notch and a second semi-housing having a second notch. A circuit plate is received in the housing and has a third notch and two strips respectively provided at a top and a bottom of the third notch. A first plug is rotatably mounted in the first notch and the second notch, and has a seat, two rods vertically extending through a top and a bottom of the seat respectively and electrically connected with the strips respectively, and two first blades horizontally inserted in the seat and respectively and electrically connected with the rods. The changeable plug has a connector with two passages for respectively receiving the first blades, and a second plug with at least two second blades perpendicular to the passages.

Abstract: Intelligent power supplies to provide power to electronic devices in a manner the avoids causing a power supply circuit fuse to blow or breaker to trip are disclosed. The power supply circuit includes a power supply control device that determines whether supplying power to an additional electronic device would exceed the capacity of the circuit and cause the fuse to blow or the breaker to trip. The power supply control device communicates with electronic devices via a power control interface to determine the power requirements of the electronic devices. Power is supplied to the devices that can be supplied without causing the fuse to blow or the breaker to trip. Power is not supplied to the devices that would cause the fuse to blow or the breaker to trip.

Abstract: A self-contained power supply module operating from utility power and having short term energy storage in the form of a battery or capacitor is adapted for powering electronic consumer devices especially during brief brownout and power outages of the utility. The self-contained power supply module is a low cost power supply having an integral AC plug adapted for connection in a standard electrical wall outlet. The integral battery or capacitor provides continuous and clean power to electronic consumer devices that may lose programmed information stored therein due to brief power interruptions thereto.

Abstract: A massive choke coil [e.g. exceeding about three henries, with at least a thousand turns and a relatively low internal resistance of about eleven ohms] placed in parallel with the A/C line, that is, preferably across the A/C line's “hot” and “common” lines, quenching the reflected signal (or back emf) that is developed when any power amplifier or other load places its demands upon the incoming A/C power line. Due to its electromagnetic characteristics, the choke tends to provide a momentary high current source of energy when needed by, e.g., a power amplifier (or other appropriate load) when transient demand is called for. The parallel choke approach tends to have a reversing effect on this signal, at least substantially reducing its presence on the A/C line, providing a greatly enhanced A/C power line signal quality, without which the otherwise untreated signals are able to modulate the A/C line.

Abstract: An apparatus for supplying auxiliary power to a portable electric device includes a casing, a battery removably accommodated in the casing, a winding unit winding and unwinding an electric wire through which electric power from the battery is supplied to the electric device, rotating forward and backward in the casing, and a contact member provided in the winding unit, including a movable contact electrically connected to the electric wire, and a secured contact electrically connected to the battery and constantly contacted with the movable contact. With this configuration, there is provided an apparatus for supplying auxiliary power to portable electric devices, which can be promptly connected to the portable electric devices and supply electric power thereto, and is convenient to carry.

Abstract: An AC-to-DC electrical adapter including a body having a first surface and a second surface, and a pair of electrically conductive blades extending outwardly from the first surface and adapted for inserting into corresponding slots of an alternating current (AC) electrical receptacle. Also comprising the invention is an AC receptacle built into the electrical adapter and accessible at said second surface. Included in the invention is a pair of electrical wires extending from the body of the electrical adapter for conducting DC current, which can be connected to a plurality of plugs, or a plurality of receptacles built into the adapter body for conducting DC current.

Abstract: A foldable transformer includes an enclosure (10), a plug assembly (12), and a locating assembly (14). The enclosure has a storage cavity (16) at a top end thereof. A window (20) is defined in the enclosure in communication with a bottom portion of the storage cavity, for receiving the plug assembly therethrough. The plug assembly includes a pair of inserting pins (34), a rotatable rod (36) having an arched profile, a pair of metal ears (38), and a pair spring pins (44). Each inserting pin is made of conductive material, is insert-molded in the rod, and electrically connects with a corresponding ear. The locating assembly includes a pair of slots (48) for receiving the spring pins, and a cam (56) for resiliently engaging with the plug assembly so that the plug assembly can be disengagably fixed in a folded position or an unfolded position.

Abstract: Intelligent power supplies to provide power to electronic devices in a manner the avoids causing a power supply circuit fuse to blow or breaker to trip are disclosed. The power supply circuit includes a power supply control device that determines whether supplying power to an additional electronic device would exceed the capacity of the circuit and cause the fuse to blow or the breaker to trip. The power supply control device communicates with electronic devices via a power control interface to determine the power requirements of the electronic devices. Power is supplied to the devices that can be supplied without causing the fuse to blow or the breaker to trip. Power is not supplied to the devices that would cause the fuse to blow or the breaker to trip.

Abstract: An electrical cabinet for an uninterruptibe power supply (UPS) system includes universal slots that can receive power modules, battery packs, or chargers. The back plane of the slot has connector terminals for battery packs and power modules. The cabinet can be easily reconfigured as desired by changing the number of power modules chargers or battery packs installed. Circuitry is provided that indicates the capacity and operational readiness of the cabinet. This circuitry monitors the battery packs in each slot, and isolates any detected fault to a particular pack.

Abstract: The present invention proposes a voltage-transforming device having a wire-winding mechanism. The wire-winding mechanism comprises a box body, a wire-winding disk, and a scroll spring. The box body has a wire tank therein. The wire-winding disk has a first disk body. Receiving grooves and wire-winding rings are disposed on two faces of the first disk body, respectively. The wire-winding disk is pivotally disposed on a projective shaft on an inside face of the wire tank through an axial hole. The power cord is wound around the projective shaft and situated in the receiving grooves of the wire-winding disk. The power cord is also wound around the wire-winding rings of the wire-winding disk. Therefore, the power cord is disposed in the receiving grooves and around the wire-winding rings of the two faces of the first disk body, respectively. The length of the power cord can thus be adjusted according to necessity.

Abstract: In a power conversion adapter which is connected to an AC power supply receptacle to convert AC power supplied therefrom to DC power, a casing body has a first principal face, a second principal face which extend in parallel with each other, and at least one pair of connection passages extending from the first principal face to the second principal face. Conductive members are disposed within the casing body so as to elastically protrude into the respective connection passages while being electrically connected to an AC/DC converter. At least one plug member each includes a base portion, and a pair of plug pieces extended from the base portion so as to have a length which is longer than a length of the connection passages. The plug member is detachably combined with one of the first principal face and the second principal face of the casing body such that the plug pieces are inserted into the connection passages while being electrically connected with the conductive members.

Abstract: An L-shaped bracket is affixed to one side of a portable battery (40). One leg of the bracket extends outwardly from the side of the battery and carries a pair of receptacles (46 and 48), one for transmitting operating and/or recharging power to the external, DC powered device and the other for transmitting recharging power to the portable battery. A carrying case (10) of heavy fabric has a plurality of compartments for diverse articles. The battery, with bracket and receptacles is mounted, preferably permanently, in an internal compartment which must be opened in order to gain access to the receptacles for insertion and removal of plugs (64). The battery is positioned in a pocket having an upper edge flush with the leg of the bracket carrying the receptacles and an upper portion of the battery extends above the pocket.

Abstract: A power supply converter having a retractable conducting wire includes a housing, a wire retracting box mounted in the housing and containing a restoring spring elastic piece therein, and an output conducting wire having a first end connected to the wire retracting box, and a second end connected to an output connector that may be connected to a mobile telephone, a notebook computer, a P.D.A., a digital camera, or the like. In such a manner, the output conducting wire can be wound by the wire retracting box, so that the power supply converter is portable, is easy to store, is easily packaged, and occupies little space.

Abstract: A power supply converter having a retractable conducting wire includes a housing, a wire retracting box mounted in the housing and containing a restoring spring elastic piece therein, and an output conducting wire having a first end connected to the wire retracting box, and a second end connected to an output connector that may be connected to a mobile telephone, a notebook computer, a P.D.A., a digital camera, or the like. In such a manner, the output conducting wire can be wound by the wire retracting box, so that the power supply converter is portable, is easy to store, is easily packaged, and occupies little space.

Abstract: An apparatus for supplying auxiliary power to a portable electric device includes a casing, a battery removably accommodated in the casing, a winding unit winding and unwinding an electric wire through which electric power from the battery is supplied to the electric device, rotating forward and backward in the casing, and a contact member provided in the winding unit, including a movable contact electrically connected to the electric wire, and a secured contact electrically connected to the battery and constantly contacted with the movable contact. With this configuration, there is provided an apparatus for supplying auxiliary power to portable electric devices, which can be promptly connected to the portable electric devices and supply electric power thereto, and is convenient to carry.

Abstract: The power adapter includes an AC input receptacle which plugs into an AC power socket. The AC input receptacle is connected to an input of a voltage converting circuit which converts the input AC voltage into a DC voltage. The voltage converting circuit is contained within a first housing, and the AC input receptacle projects from the first housing such that it can be easily connected to a wall socket. A first cable is connected to the output of the voltage converting circuit and runs from the first housing to an input of a voltage regulating circuit which is contained within a second housing remote from the first housing. The voltage regulating circuit maintains and outputs the DC voltage within a desired range. The output from the voltage regulating circuit is connected to respective prongs of an electrical device connector via a second cable.

Abstract: A switchable power supply includes a moveable electrical plug holding member that has a first position, which places an electrical plug pair in position for use with a first voltage standard, and a second position, which places the electrical plug pair in position for use with a second voltage standard. A switch is in a first state when the moveable electrical plug holding member is in the first position and is in a second state when the moveable electrical plug holding member is in the second position. When the switch is in the first state, a voltage modifier circuit generates a first output voltage and when the switch is in the second state, the voltage modifier circuit generates a second output voltage.

Abstract: The present invention proposes a voltage-transforming device having a wire-winding mechanism. The wire-winding mechanism comprises a box body, a wire-winding disk, and a scroll spring. The box body has a wire tank therein. The wire-winding disk has a first disk body. Receiving grooves and wire-winding rings are disposed on two faces of the first disk body, respectively. The wire-winding disk is pivotally disposed on a projective shaft on an inside face of the wire tank through an axial hole. The power cord is wound around the projective shaft and situated in the receiving grooves of the wire-winding disk. The power cord is also wound around the wire-winding rings of the wire-winding disk. Therefore, the power cord is disposed in the receiving grooves and around the wire-winding rings of the two faces of the first disk body, respectively. The length of the power cord can thus be adjusted according to necessity.

Abstract: Disclosed herein is a FET controlled AC/DC power conversion circuit and application of same. The entire conversion circuit is constituted by a rectifier circuit, a switching circuit consisting of a FET, a controlling circuit, a monitor circuit, and a voltage stabilizing circuit, wherein output voltages of the rectifier circuit is respectively sent to the switching circuit and the controlling circuit, where switching time of the switching circuit is controlled by the controlling circuit thereby achieving control of output voltage to a load or loads.

Abstract: An outlet receptacle has a base adapted to attach to the wall of a structure and an electrical element attached to the base. The electrical element includes a female receptacle capable of delivering low voltage DC current to a corresponding male insert, a step-down transformer and an AC/DC converter. The outlet receptacle is adapted to convert AC house current to low voltage DC current. The outlet receptacle is useful in recharging batteries used in portable electronic devices.

Abstract: A power source supplier usable in an automobile includes a body, a power supply terminal connected to a rear end of the body and able to insert in a cigarette lighter socket in an automobile. A tail base is fixed on a front side of the body, and a coupling member fixed on an end surface of t he tail base and having an intermediate hollow space for another components to couple with therein. Any other components having the size and specifications as the coupling member can be applied to couple with the couple member so that a user can choose one of them.

Abstract: The present invention relates to a voltage transformer having a wire-winding mechanism and, more particularly, to a voltage transformer having a power wire capable of automatically winding so that the power wire can be positioned therein. The present invention is characterized in that a wire-winding mechanism is installed in the voltage transformer. The wire-winding mechanism comprises a box body, a winding disk, and a scroll spring. The box body is installed in the housing and has a wire tank formed therein. The winding disk is pivotally installed in the wire tank. The power wire is wound around the winding disk. One end of the power wire can protrude out of the box body. The scroll spring is installed in the box body and joins the winding disk. The length of the power wire can be adjusted according to necessity so that entanglement of wire due to a too-long length of external wire or inconvenience of use due to a too-short length of external wire will not arise.

Abstract: A rectifying device receiving a first power signal from a power source and outputting multiple power signals includes a rectifying device body receiving and rectifying a first power signal for generating a third power signal and an outlet mounted on the rectifying device body and electrically connected with the power source for supplying a second power signal. The rectifying device further includes an inlet having a plurality of conducting pieces electrically connected with the power source. The rectifying device body includes a first housing, a second housing, a circuit board positioned between the first housing and the second housing, and a connector mounted on the circuit board and electrically connected between the outlet and the inlet for transmitting the first power signal therethrough.

Abstract: First, second and third capacitors (11, 12, 13) having predetermined capacitance values are connected in series in a commercial alternating current line. A rectifier bridge (14, 15, 16, 17) including two diodes (14, 15) having backward characteristics adjusted to a Zener voltage is connected in parallel with the capacitor (12) in the center, and a smoothing capacitor is connected between a first end and a second end of the rectifier bridge (14, 15, 16, 17). As a result, it is possible to divide alternating current (AC) from a power input terminal into a desired voltage while insulating it, and clip it with a predetermined voltage to shape it into a voltage waveform close to a rectangular wave and smooth it. Thereby, a stabilized DC voltage with less ripples can be obtained.

Abstract: A secondary adapter for receiving a DC power signal and providing an ouput power signal as an input to an AC power adapter is disclosed. The AC power adapter may then provide a DC power signal to meet the input power requirements of an electronic appliance. While the AC power adapter is adapted to receive power from an AC power source, the secondary adapter converts a DC power source to provide an input power signal which is sufficient to power the AC power adapter. The secondary adapter enables the AC power adapter to provide power to the electronic appliance from either an AC power source or a DC power source.

Abstract: A power-transforming device including a power-transforming body for transforming an input power into a transformed power and an output port extractably mounted in the power-transforming body for outputting the transformed power is provided. Because the electric wires and plugs of the power-transforming device can be extracted from the power-transforming body and be collected separately, the power-transforming device is very convenient to be carried and used.

Abstract: A contactless connecting system based on power transmission by induction includes an embedded transmitting part flush with ground level and a receiving part which is placed above it. The invention provides the possibility of supplying any standard electrical appliance once it is connected to the terminal; the standardization of the terminals which can be set on any contact block and receive power after recognition; the tightness of the embedded part; the safety provided for the electric power supply; and the continuous adaptation of the power supply to the variations in the load (the regulating algorithm is contained in a non-volatile memory). The dialogue established between the transmitting part and the receiving part enables the recognition of the type of terminal and the remote transmission of information for invoicing, remote monitoring, etc.

Abstract: An adapter used in conjunction with voltage modules to provide multiple and variable DC output voltages. The adapter may include a circuit for stepping down an AC input voltage to lower AC output voltages. A voltage module is provided having an interface bus, configured to be coupleable to a distribution bus on the voltage adapter. Preferably, the voltage module includes AC-DC conversion circuitry, such that the AC output voltages received from the adapter may be converted to DC voltages. Once the adapter and voltage module are coupled together, the voltage module allows the user to select among the multiple DC output voltages provided. In some embodiments, the adapter includes additional circuitry for converting the stepped-down AC voltages into DC output voltages. Additional separate voltage modules may be coupled to the first voltage module, in series, to form a modular stack of voltage modules. Like the first voltage module, the second voltage module may have a selectable output voltage, as well.