Abstract: Briefly, in accordance with one embodiment of the invention, a DC-to-DC converter package includes: a DC-to-DC converter circuit. The components of the DC-to-DC converter circuit that perform high frequency switching during converter operation are surface mounted on a printed circuit board (PCB) so that the heat produced from the high frequency switching is approximately equally distributed at least over the portion of the PCB where the components are mounted.

Abstract: A choke coil [e.g exceeding about three (3) henries] 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 it's 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 invention's parallel choke approach, due to the fact that it must be magnetically charged by electricity [either from the A/C line or back electromotive force (emf) from it's load] tends to have a reversing effect on this signal, preventing, eliminating or at least substantially reducing it's presence on the A/C line, thereby providing a greatly enhanced A/C power line signal quality for the load.

Abstract: A power distribution center (PDC), such as those used in automotive vehicle electrical systems, has device for pivotally connecting a power supply terminal with the PDC such that pivoting movement of the terminal relative to a PDC housing inserts the terminal through an aperture formed in the housing and into contact with a bus bar retained within the housing. The pivoting connection between the terminal and the PDC allows the terminal to be securely connected with the bus bar without the need for any tools, and provides a degree of alignment to guide the terminal into the aperture. It also provides leverage so that a worker can easily generate sufficient force to insert the terminal into connection with the bus bar in the presence of a force resisting insertion, such as may be generated by a spring clamp or other device for urging the terminal into contact with the bus bar.

Abstract: Military vehicles often provide power to operate chargers to charge portable rechargeable batteries in the field. The military uses a NATO standardized DC slave plug as a connection from the vehicle battery to external charger devices. The NATO standardized DC slave plug is directly connected to the vehicle battery and offers no electrical protection to the vehicle battery. This method employs a battery charger adapter providing controlled DC power from the vehicle battery to charger devices for recharging Army communication batteries. The battery charger adapter is connected between the NATO standardized DC slave plug and an external charger and includes an electromechanical relay acting as an automatic safety switch which cuts off the load on the vehicle battery when the battery voltage falls to a predetermined critical voltage level, to prevent over-discharge of the vehicle battery.

Abstract: A computer system operable on a DC voltage is provided. The computer system includes a microprocessor, a system memory coupled to the microprocessor, a bus coupled to the microprocessor, an input device coupled to the bus, and a voltage adapter system for providing a DC voltage to the computer system. The voltage adapter system includes a voltage modifying device adapted for converting an AC voltage to a DC voltage. A first cable assembly is electrically connected to supply the AC voltage from an AC power supply to the voltage modifying device. A second cable assembly is provided for selectively supplying the DC voltage to the system from the voltage modifying device or from a remote DC voltage power supply. The second cable assembly is connectable at a first end to the system and connectable at a second end to the voltage modifying device and to the remote DC voltage power supply.

Abstract: IGBT modules, bus bars and capacitors in an inverter main circuit are secured on the front face of a heat sink and at the back side of the heat sink a water cooling channel is formed to cool the IGBT modules. The bus bars and the capacitor, thereby the size of an inverter device used in an electric car is reduced and the duration thereof is prolonged.

Abstract: A coil bobbin for an AC adapter provides two flanges to be formed at both ends thereof, having coils wound between these flanges, and an incorporated core. At a lower portion of one flange, a unit to fit a rectifying circuit configured by electronic components is provided. A mounting apparatus is configured so that it is selectable whether electronic components are directly attached to a lower portion of a flange, or a substrate on which electronic components are mounted is attached.

Abstract: An electrical receptacle that provides dual-mode electric power through two separate sockets. The electrical receptacle includes a first socket configured to supply AC electric current at a high voltage (such as 120V or 240V AC) and a second socket configured to supply DC current at a low voltage current (such as 4V, 6V, or 12V DC). In one embodiment, the receptacle receives the high-voltage AC from electrical wiring in a building and generates the low-voltage DC. This embodiment of the receptacle has input terminals for receiving AC, mounting hardware, an AC-to-DC converter, and one or more DC output sockets. The receptacle may also have a standard AC output socket. The receptacle may be used to provide direct current at several different voltage levels. The different voltages may be accessed simultaneously through several different DC sockets. Alternatively or in combination, one or more switches may be used to select the voltage level delivered by individual sockets or groups of sockets.

Abstract: A light socket is disclosed that has a built-in integrated circuit for rectifying the alternating current received from an electrical outlet and limiting the direct current produced. The light socket is specifically suited for low-current, low-voltage applications such as supplying DC to a string of ornamental lights. The integrated circuit has a diode with a modified cathode that acts as a fuse as it is rectifying the alternating current. The cathode is formed of a plurality of electrically parallel conductors. Excessive current blows out at least some of these conductors in the same way a conventional fuse blows. Various embodiments add other current-limiting elements, elements for producing full wave or near will wave rectification, and for opening the circuit when they detect extraneous currents.

Abstract: An automobile charging unit for a pager including an adapter portion dimensioned for being received within a standard cigarette lighter socket of a vehicle. The adapter portion has contacts thereon for mating with charging contacts within the cigarette lighter socket. A flexible neck portion extends outwardly from an outer end of the adapter portion. A pivot ball joint is secured to an outer free end of the flexible neck portion. A pager housing is provided that is dimensioned for receiving a pager therein. The pager housing has a charging contact therein in communication with the contacts of the adapter portion. The charging contact aligns with a charging contact of the pager when positioned within the pager housing. The pager housing includes a back wall secured to the pivot ball joint.

Abstract: A NATO DC slave plug adapter for use in providing controlled DC power from he battery of a military vehicle to charger devices for recharging Army communication batteries includes an automatic safety switch which cuts off the load on the vehicle battery when the battery voltage falls to a critical level. The critical level may be generally determined by the amount of charge necessary in the vehicle battery to start or reliably operate the vehicle.

Abstract: A universal, voltage variable, safety enhanced electric connector system is provided. Each connector in the system includes a housing, an electric plug and receptacle disposed at opposite side walls of the housing, and power supply circuit means disposed within the housing and connected between the electric plug and receptacle. The power supply circuit means includes a voltage transformer for converting an input power supply voltage into high and low voltage AC power supplies. It also includes the rectifier for converting AC power supply voltage into DC power supply voltage, as well as an AC voltage regulator, a DC voltage regulator and a DC output jack coupled to the rectifier. At least one insertion slot corresponding to one of the transformer voltage outputs in formed on a left side wall of the housing with a pair of metal contact plates provided therein.

Abstract: A voltage booster device for increasing the voltage level of power received by a recreational vehicle (RV) from a separate 120-volt power source includes an electrical box, a power cord and female outlet on the box, and an encapsulated transformer within the box. The transformer (e.g., an autotransformer) is adapted to increase the actual voltage level of the separate 120-volt power source a predetermined amount. A relay is provided for switching the transformer, the power cord, and the female outlet between (i) a first circuit configuration that couples power from the power cord to the female outlet via the transformer so that the transformer increases the voltage level by the predetermined amount, and (ii) a second circuit configuration that bypasses the transformer so that the transformer does not increase the voltage level by the predetermined amount.

Abstract: A power transformer is described comprising a housing with a catchment on its face and a catchment on its side and an adapter plug whose back side fits over the face and the side of the housing. The adapter plug has a projection on its face, and a projection on its side which includes a ridge at the distal end. The projection on the face of the adapter plug fits into the catchment on the face of the housing, and the projection on the side of the adapter plug fits into the catchment on the side of the housing and is restrained therein. The face of the adapter plug comprises a plug configuration selected from the group consisting of international electrical plug configurations.

Abstract: A multi-output power supply having half-brick dimensions includes a forward converter circuit which receives a DC input voltage and in response to a first control signal generates a first DC output voltage at a first level; and a buck regulator circuit which receives the first DC output voltage from the forward converter circuit. In response to a second control signal, the buck regulator generates a second DC output voltage at a second level.

Abstract: An AC-DC voltage conversion integrate circuit that integrates all the control and protection circuits, as well as the power transistors, into a single module. Passive components, such as the transformer and capacitors, are very small, as the switching frequency is in the KHz or MHz range. Including one or more integrated switched mode power supply ICs in every wall outlet allows for providing a plurality of DC voltages from such outlets.

Abstract: A high-efficiency, compact and low-cost electric power storage air-conditioning system incorporates inside its air-conditioner an electric power storage unit including a battery which is electrically interconnected to a d.c. system of the air-conditioner. Charging of the battery is controlled to be executed only during a steady operation of the air-conditioner when its load is light. Since a d.c. voltage of the battery is used directly as a d.c. voltage to drive the air-conditioner, a high efficiency, minimized loss and economical operation conditioning system is achieved.

Abstract: An uninterruptible power supply (UPS) system includes a control and display module operational with a UPS when carried by a housing of the UPS and when remote from the housing. An orientation sensing switch carried by the module senses a horizontal or vertical position of the module and provides a signal to a module processor for providing performance diagnostics of the UPS in a horizontal or vertical format as appropriate. The UPS system housing includes support arms extendable from the housing for providing added stability to the housing when in a vertical position. The control and display processor receives manual input from user buttons on the module and communicates with a UPS processor carried by the housing. The UPS includes a battery positioned within the housing for access by removal of a front housing panel for avoiding movement of the UPS system during replacement of batteries.

Abstract: A light socket is disclosed that has a built-in integrated circuit for rectifying the alternating current received from an electrical outlet and limiting the direct current produced. The light socket is specifically suited for low-current, low-voltage applications such as supplying DC to a string of ornamental lights. The integrated circuit has a diode with a modified cathode that acts as a fuse as it is rectifying the alternating current. The cathode is formed of a plurality of electrically parallel conductors. Excessive current blows out at least some of these conductors in the same way a conventional fuse blows. Various embodiments add other current-limiting elements, elements for producing full wave or near full wave rectification, and for opening the circuit when they detect extraneous currents.

Abstract: A universal linear power supply capable of automatically supplying a regulated DC current output from a range of AC input. In one preferred embodiment, interchangeable modular electrical plugs configured to mate with standard AC supplies releasably connect with the power supply. The power supply circuitry comprises a two-winding step-down transformer, a rectifier and a DC/DC step-down buck converter. A projection on selected electrical plugs mechanically engages a switch on the power supply, connecting the primary coils of the transformer either in series or in parallel to accommodate 110 VAC or 220 VAC input. In another preferred embodiment, the invention comprises an electrical plug for accessing VAC input connected, releasably or permanently, to a power supply comprising a linear transformer, a full-wave rectifier and a DC/DC step-down forward converter which is capable of accommodating the full range of standard AC voltage.

Abstract: The present invention provides a self-contained converter plant for use in a modular power supply system. A modular power supply system includes a chassis having power unit bays each configured to receive a power unit module therein, a power distribution bus, a communications bus and a controller. In one embodiment, the self-contained converter plant comprises a housing having a power input connector configured to engage an electrical power interface on the power distribution bus and a converter communications connector configured to engage a communications interface on the communications bus. The converter plant further comprises a converter, and a power distribution device, all contained in the housing. The power distribution panel is electrically coupled to the converter.

Abstract: A dual range power supply 200 is operable with either an AC line input, or a DC input. To facilitate use with an AC input the power supply is provided with a pair of AC prongs, connected to a rectifier bridge. The power supply is also provided with a positive DC receptacle. In using the power supply with a DC source, the power supply is connected to an adapter. The adapter has receptacle slots for receiving the AC prongs of the power supply, and a positive DC prong which mates with the positive DC receptacle of the power supply. Positive DC power is applied to the power supply through the positive DC receptacle while the DC return is through the rectifier bridge and at least one of the AC prongs.

Abstract: The present invention relates to a battery charging unit comprising a housing having a current supply means provided therein for supplying current to an electrical or electronic apparatus located remote from the battery charging unit, coupling means provided on the housing for coupling the current supply means to a mains power supply, means for coupling the remote apparatus to the current supply means, comprising a cable, and a reel provided in the housing for storing the cable in the housing when the battery charging unit is not in use, and allowing the cable to be dispensed when required. This has the advantage that by having a device around which the cable remains wound during storage and from which the cable is simply unwound from the charging unit when it is required eliminates the unsightly and messy bunching of the cable which is a feature of known charging units.

Abstract: The present invention relates to a battery charging unit comprising a housing having a current supply means provided therein for supplying current to an electrical or electronic apparatus located remote from the battery charging unit, coupling means provided on the housing for coupling the current supply means to a mains power supply, means for coupling the remote apparatus to the current supply means, comprising a cable, and a reel provided in the housing for storing the cable in the housing when the battery charging unit is not in use, and allowing the cable to be dispensed when required. This has the advantage that by having a device around which the cable remains wound during storage and from which the cable is simply unwound from the charging unit when it is required eliminates the unsightly and messy bunching of the cable which is a feature of known charging units.

Abstract: The present invention provides a relief to the low voltage, high current spiral trend being seen in the microprocessor industry. A microprocessor module is designed to receive a voltage V2, which is substantially higher than a logic gate utilization voltage V3. V2 is supplied at a current rating of I2 to a plurality of within-module voltage converters, designated as 220a, 220n, which directly distribute voltage V3 and the appropriate current portion I3 to the respective logic gates 210. Preferably, voltage V2 is substantially greater in magnitude than voltage V3, typically V2:V3 being at least 5:1 but preferably 40:1 to as much as 100:1. By example, V2=50 vdc, 12=3 amps and V3=1.0 vdc would satisfy the ratio considerations. The microprocessor loads serviced by the present invention constitute millions of logic gates requiring low voltages ranging from 0.75 Vdc to 1.5 Vdc. Other microprocessor loads, such as cache, can be powered with flip chip technology using the technique of the present invention.

Abstract: Power supplies which include sockets for supplying DC voltages as well as cables for supplying DC voltages to internal components of, for example, a computer are configured to prevent a user from connecting to an inappropriate DC voltage. The apparatus includes a special multiple din socket which provides a different voltage at each din of a subset of the dins, only one din of which is alive at a time. The apparatus includes a switch at each socket operative to select only a single din of a subset of dins at that socket. The illustrative apparatus includes several sockets, each one of which includes a different subset of dins selected by a switch, a single din at a time.

Abstract: The present invention relates to a converter housing 10, in particular for n electronic converter for halogen lamps. The converter housing 10 in this case has a basic housing body 12 for holding electronic components, and a terminating element 14 with a cable support for supporting at least one electric connecting cable. The basic housing body 12 and the terminating element 14 are arranged perpendicular to one another in this case. At the end opposite the terminating element 14, the basic housing body 12 additionally has an end face 18 rounded off towards its underside.

Abstract: Electrical equipment such as a personal computer includes a plurality of internal components which require different voltages including low voltages of about five volts for operation. The different voltages are supplied by an internal power supply, with a voltage regulator, which is itself connected to an appropriately transformed high voltage supply typically from an in-the-wall source. Peripherals such as a FAX/modem, CD ROM, or tape recorder are powered by cables plugged into mating sockets in the face of the computer housing. The sockets, in turn, are connected to the appropriate outputs of the internal power supply to obtain appropriate voltage power directly from the host computer in the absence of a transformed connection to a house supply. A switch is provided at each of the sockets to vary the voltage there.

Abstract: A power supply unit for an electronic device includes a power plug and an interconnection between the poser plug and the device. A power plug for an AC-DC adapter fits into a battery compartment of an electronic device instead of into a separate jack. The power supply unit includes an elastic cover that ensures a positive connection between the device and the power plug to prevent accidental disengagement of the power plug from the device. The power plug and battery compartment are configured so that an incorrect power plug cannot be connected by mistake. The configuration preferably includes a switch to signal the device that an AC-DC adapter is installed.

Abstract: An uninterruptible power supply (UPS) system includes a control and display module operational with a UPS when carried by a housing of the UPS and when remote from the housing. An orientation sensing switch carried by the module senses a horizontal or vertical position of the module and provides a signal to a module processor for providing performance diagnostics of the UPS in a horizontal or vertical format as appropriate. The UPS system housing includes support arms extendable from the housing for providing added stability to the housing when in a vertical position. The control and display processor receives manual input from user buttons on the module and communicates with a UPS processor carried by the housing. The UPS includes a battery positioned within the housing for access by removal of a front housing panel for avoiding movement of the UPS system during replacement of batteries.

Abstract: A plug is diclosed that is adapted to be inserted into a standard electrical outlet and has a built-in integrated circuit for rectifying the alternating current received from the outlet and limiting the direct current produced. The plug is specifically suited for low-current, low-voltage applications such as supplying DC to a string of ornamental lights. The integrated circuit has a diode with a modified cathode that acts as a fuse as it is rectifying the alternating current. The cathode is formed of a plurality of electrically parallel conductors. Excessive current blows out at least some of these conductors in the same way a conventional fuse blows. Various embodiments add other current-limiting elements, elements for producing full wave or near full wave rectification, and for opening the circuit when they detect extraneous currents.

Abstract: A fixture is provided for facilitating the fabrication of a motor controller of the type including a power substrate module and a control circuit board mounted to and electrically coupled to the power substrate module via a plurality of conductors. The fixture is preferably a ring-like structure made of epoxy-fiberglass laminate. Apertures for engaging and holding the conductors are provided in the fixture at locations corresponding to conducting pads on the power substrate module. For fabrication, the power substrate module and the fixture are preformed and solder is disposed on the conducting pads of the module. During fabrication, the conductors are inserted into the apertures in the fixture and the fixture and conductors are positioned over the preformed power substrate module to bring the conductors into contact with the conducting pads. The fixture and power substrate module are then passed through a reflow oven to melt the solder and complete the connection of the conductors to the module.

Abstract: A power supply apparatus comprises a housing having a panel. A power supply circuit is disposed in the housing. The power supply circuit supplies power to a load. A control circuit controls the operation of the power supply circuit in accordance with control information. The control circuit is formed on a printed circuit board mounted on the panel in the housing. The printed circuit board is provided with a control which can be operated from outside the housing. The control provides the control information in response to operation thereof from outside the panel.

Abstract: A high voltage transformer module (50) having a pair of high voltage substrates (64, 66) and a pair of low voltage substrates (62, 68) on which high and low voltage components are respectfully mounted. Mounted between the substrates are a plurality of transformers (92a, 92b, . . . 92n). In a preferred embodiment, each of the plurality of transformers is coupled to a full bridge rectifier (102a, 102b, . . . 102n) and the outputs of the rectifiers connected so that an output voltage produced by each transformer/rectifier pair is summed to produce a total output voltage for the high voltage transformer module. Electrical shorts are prevented within the module by fixedly mounting the substrates in the casing and by filling the cavities formed between the substrates with insulation having a high breakdown voltage. The components on the high voltage substrates are both physically and electrically isolated from the components on the low voltage substrates.

Abstract: Electrical equipment such as a personal computer includes a plurality of internal components which require different voltages including low voltages of about five volts for operation. The different voltages are supplied by an internal power supply, with a voltage regulator, which is itself connected to an appropriately transformed high voltage supply typically from an in-the-wall source. Peripherals such as a FAX/modem, CD ROM, or tape recorder are powered by special connectors in the face of the computer housing and connected to the appropriate outputs of the internal power supply to obtain low voltage power directly from the host computer in the absence of a transformed connection to a house supply.

Abstract: A wall socket is adapted to be flush-mounted in a wall terminal box. The base of the wall socket comprises a base portion, which is flush-mounted in the wall terminal box and supports connector terminals for an alternating voltage available in the wall terminal box, as well as a surface-mounted base portion, which is located outside, and is laterally offset in relation to the opening of the wall terminal box and which supports at least one low-voltage socket (31) for a direct voltage. A surface-mounted cover (40) encloses not only the opening of the wall terminal box (10) but also the surface-mounted and laterally-offset base portion, and further is formed with one or more openings giving access to the low-voltage socket. A transformer and rectifier element arranged in the wall terminal box has an alternating voltage side for connection to the alternating voltage, as well as a direct-voltage side for emitting step-down transformed and rectified voltage to the low-voltage socket (31).

Abstract: A power supply device including a casing, a cover plate covered on the casing, an electronic exchanging type power circuit assembly mounted in the casing and adapted for dropping DC voltage and changing AC voltage, a DC power plug and an AC power plug adapted for alternatively mounting on the top cover for connecting DC power supply from a socket for cigarette lighter of a car or AC power supply from an AC power supply outlet to the electronic exchanging type power circuit assembly, the cover plate having a rectangular top chamber extended to one end, DC terminals and AC terminals mounted in the rectangular top chamber and respectively connected to the electronic exchanging type power circuit assembly for receiving DC power supply through the DC power plug or AC power supply through the AC power plug, the casing having spring-supported stop means adapted for stopping the AC power plug or DC power plug in the rectangular top chamber of the cover plate.

Abstract: A multi-output power supply having half-brick dimensions includes a forward converter circuit which receives a DC input voltage and in response to a first control signal generates a first DC output voltage at a first level; and a buck regulator circuit which receives the first DC output voltage from the forward converter circuit. In response to a second control signal, the buck regulator generates a second DC output voltage at a second level.

Abstract: An uninterruptible power supply (UPS) (100) has a housing (111) that supports the major electrical components of the UPS (100), i.e., a transformer circuit (207), a switching circuit (217), and a battery (209). Furthermore, a connector (107;115;117) affixed to the housing (111 ) is capable of removably affixing the UPS (100) to an alternating-current (AC) outlet (102).

Abstract: A branch circuit includes an branch breaker, a master outlet, and two slave outlets in series with the master outlet. The master outlet is the closest of the outlets to the circuit breaker. It includes a power sensor, the output of which is graphically displayed on a multi-segment LED display visible from the front of the outlet. The power sensor output is also supplied to displays at the slave outlets so that the power measured at master outlet is indicated at all outlets. This allows the available power capacity for the branch circuit to be appropriately indicated at all outlets on the circuit. The design can be implemented inexpensively enough that it is economical to employ the invention at every outlet in a building.

Abstract: A portable electronic device holster (105) includes an AC voltage convertor (115) having at least two AC prongs (102) extending therefrom. The AC voltage convertor (115) is captured within the holster (105) and can be extended and retracted. When a portable electronic device is inserted in the portable electronic device holster (105), the AC voltage convertor (115) is extended, and the at least two AC prongs (120) are inserted into a standard AC power socket, a voltage down convertor circuit (405) within the AC voltage convertor (115) generates a down converted voltage which is coupled to the portable electronic device. Alternatively, an AC voltage convertor (615) slidably attaches to a portable electronic device and generates a down converted voltage which is coupled to the portable electronic device when AC prongs (120) extending from the AC voltage converter (615) are inserted into a standard AC power socket.

Abstract: A power supply with interchangeable plug capacity and interchangeable power input modules includes a casing, an electrical plug detachably mounted in the casing, allowing the user to accommodate various power source configurations and voltage supply levels without manually setting the unit for the available power source, resulting in increased user safety and convenience. Releasable locking mechanisms are included to engage the interchangeable electrical plug. The locking mechanisms can be released by a user to allow the plug to be moved to the detached position. A preferred form of electrical connection between a detachable plug and casing comprises a submerged conductor configuration to protect the user or passerby from electric shock. A variety of interchangeable electrical plugs can be fitted to the same casing for interface with a transformer in the power supply casing.

Abstract: Phase coil lead wires of a vehicle-mounted alternator with two three-phase star connections are led almost in parallel out of the armature in an axial direction, welded to lead wire connection parts of insert terminals of a circuit board, and connected in parallel to form the star connections by way of the insert terminals. The star connections are achieved in a solderless manner, without twisting or bending the phase coil lead wires. Consequently, there is no possibility of injuring the lead wires due to applications of large stress.

Abstract: An AC-DC adapter has a hollow enclosed electrically insulated housing. The housing has two parallel oppositely disposed surfaces. One surface has at least two spaced male openings for accommodating together a male electrical connector. The other surface has at least two spaced female openings for accommodating together a female connector. Each male opening is aligned with a corresponding one of the female openings. At least two elongated electrically conductive members, are utilized. Each member has a blade shaped element at one end which is adapted to be inserted detachably in a socket shaped element and has a socket shaped element at the other end which is adapted to receive detachably a blade shaped element. Each member is disposed in the housing and is aligned with a corresponding pair of male-female openings. The blade shaped element of each member extends outwardly in the corresponding male opening from the one surface.

Abstract: A high voltage transformer module (50) having a pair of high voltage substrates (64, 66) and a pair of low voltage substrates (62, 68) on which high and low voltage components are respectfully mounted. Mounted between the substrates are a plurality of transformers (92a, 92b, . . . 92n). In a preferred embodiment, each of the plurality of transformers is coupled to a full bridge rectifier (102a, 102b, . . . 102n) and the outputs of the rectifiers connected so that an output voltage produced by each transformer/rectifier pair is summed to produce a total output voltage for the high voltage transformer module. Electrical shorts are prevented within the module by fixedly mounting the substrates in the casing and by filling the cavities formed between the substrates with insulation having a high breakdown voltage. The components on the high voltage substrates are both physically and electrically isolated from the components on the low voltage substrates.

Abstract: A plug-in transformer power supply having magnetic and electronic circuits is optimized for output power while complying with UL Class 2 limits. In an embodiment, a 12 VDC unit capable of 21 W of output power is disclosed. In another embodiment, a 24 VDC unit capable of 33.6 W of output power is disclosed.

Abstract: An AC-DC voltage conversion integrate circuit that integrates all the control and protection circuits, as well as the power transistors, into a single module. Passive components, such as the transformer and capacitors, are very small, as the switching frequency is in the KHz or MHz range. Including one or more integrated switched mode power supply ICs in every wall outlet allows for providing a plurality of DC voltages from such outlets.

Abstract: A power supply arrangement including a bottom shell for a notebook computer which has two battery chambers and a power input socket, at least one battery set for insertion into the battery chambers respectively to provide the notebook computer with DC power supply, an adapter for converting AC power supply into DC power supply for the notebook computer, and a power connector for connecting the adapter to the power input socket on the bottom shell of the notebook computer, wherein the adapter can be directly installed in one battery chamber to electrically connected to the power supply circuit of the notebook computer or externally connected to the power input socket on the bottom shell of the notebook computer by the power connector.

Abstract: Procedure and apparatus for the control of electric power, by which procedure the electric power supplied to a load is regulated by means of a regulator, e.g. a thyristor regulator. The regulator control signals, e.g. thyristor firing pulses, are produced by a separate control unit (6), from where they are passed in the form of optical signals via at least one optical fibre (2) to a socket or equivalent and further to a photosensitive device (Q), which converts the signals into electrical form and applies them to at least one controllable solid-state component, e.g. thyristor, in the power stage of the regulator.

Abstract: A plug-in power supply includes a housing dimensioned to fit into a space designed to accept a circuit breaker in a load center to provide D.C. power from an A.C. main power. The housing encloses a circuit card that has components that are connected between A.C. inlet terminals and D.C. output terminals to provide a peak current for a short duration, limit the output to a D.C. voltage maximum, and interrupt the output current when the output voltage drops below a certain level.