Abstract: A ferromagnetic voltage regulator has the saturatable core reactor and electromagnetic winding closely coupled with a fan mounted in a housing on one surface to cool the assembly by forcing air through the windings and over the other surfaces of the regulator.

Abstract: A DC to AC power inverter has an improved construction providing for substantially improved thermal disipation, reliability, and efficiency; the inverter has a unitary combination frame and heat diffuser with a pair of opposed U-shaped sections at right angles to each other and with a common base, a cover, a transformer, a primary internal heat sink inside of and on the frame, a plurality of power switches fastened on the internal heat sink, a printed circuit board fastened to and spaced from the heat sink with leads from the switches connected to the board, the transformer is fastened onto the frame in heat exchange relationship and part of the coil extends through the frame into an air passageway. All of the wiring access is on a field wiring end and the opposite end is a control end with the switches and circuit board; an improved arrangement of components and leads provides discrete separation of the high and low voltage components and leads.

Abstract: A semiconductor stack including a semiconductor element such as a thyristor and a gate turnoff element, at least one heat sink for cooling the semiconductor element, a first conductor plate having at least one slit in order to form at least two branches in its one end portion, clamp members for tightly fastening the semiconductor element, the heat sink and the first conductor plate in series, and at least two fuse members secured in parallel between a second conductor plate and the branches of the first conductor plate, thereby removing a tensile stress given to the fuses. The slit may be formed in the second conductor plate instead of the first conductor plate.

Abstract: A transformer structure includes two planar primary windings in a single plane with one primary winding on each leg of a core. The primary windings are connected in series or in parallel. The secondary structure includes a planar conductor structure about the core. A conductor passes through the core and makes electrical connection to the planar conductor through diode rectifiers. An anti-phase embodiment has dual primary circuits and dual cores with a combined secondary structure. Both plate-form and circuit card form embodiments are disclosed.

Abstract: Apparatus for mounting TO-220 solid state device packages on a heat sink. Each package includes an electrically conductive, heat dissipating, heat sinking tab which is common with one of the electrical terminals, and a resin case. The heat sinking tab includes an opening therethrough intended to be used in mounting the package to a heat sink. The apparatus comprises a printed circuit board mounted to the heat sink. An opening is provided in the board. The devices are adapted to be oriented during mounting so that they overlie the opening with their heat sinking tab sides facing toward the opening and their resin case sides facing away from the opening. A first bar of thermally conductive material is adapted to be positioned between the heat sink and the heat sinking tab sides of the packages and extending through the opening. A layer of electrically insulative and thermally conductive material is interposed between the bar and the heat sinking tab sides of the packages.

Abstract: This invention relates to an enclosed D.C. converting station having enclosed 3-arm integral type bulbs constructed integrally with bulbs for three arms of the same polarity side of bulb arms for forming a 3-phase bridge circuit.

Abstract: A low-inductance bus bar arrangement includes at least n+1 individual bus bars for establishing a quick connection of modular components of n dependent circuits. The n+1 individual bus bars are stacked upon each other and are electrically separated from each other by insulation. The two outermost bus bars are electrically connected to each other by an appropriate connecting device. While the several modular components of the n dependent circuits are quickly connectable to the bus bar, the bus bar itself provides an inherently low inductance.

Abstract: A high frequency power converter circuit having a transformer comprised of a magnetic element having a through hole in combination with a pair of diodes having opposed terminals and at least one of which extends through the magnetic circuit element through hole. Bussbar conductors have the diodes and magnetic element coupled therebetween. The circuit inductance is formed by a further magnetic circuit member associated with one of the bus conductors.

Abstract: The converter contains a number of electronic elements (3, 5, 7, 8, 9) and cooling elements (2), which are all mounted on a common holding plate (1) designed as a holding component. The holding plate (1) comprises the necessary electrical connections (10, 11, 14) and can be connected via plugs (10, 11, 14) to a base plate mounted in the corresponding device.Owing to this modular structure, the converter can easily be adapted to varying types of power without the need for structural modifications. The converter is economic to produce and to test and is also extremely convenient to use and to maintain.Also disclosed is ripple control transmitter apparatus in which such converters are used for frequency changing and are arranged for convenient use and good cooling.

Abstract: A converter comprises a plurality of modules each having a heat-sink unit with a base-plate made of a good heat-conducting metal material, acting as a support for the electronic components, a pair of parallel flanges laterally fixed to the opposite edges of the base-plate, and a rear plate for connection of the draw-in contacts capable of cooperating with the studs of a fixed connecting base. Error prevention means, formed by pins and orifices prevent any module connection error. The draw-in contacts are achieved by tulip-fingers or grips capable of being housed in six holes of the connection plate. The assembly forms a rack which can be actuated by a handle.

Abstract: A switching regulator designed for high power high current transfer is adapted for reducing leakage inductance and heat dissipation. The switching regulator comprises a transformer/receiver assembly utilizing a planar winding configuration in the transformer. The planar secondary winding is a short, large area thermo-path interface for heat dissipation in a cooling medium.

Abstract: A center-tapped transformer apparatus with rectifiers is adapted to permit first and second secondary electrode plates to be joined with a secondary coil on the fronts of both ends thereof, on the front of the electrode plates of the secondary coil an electrode plate connected to an output terminal, the other rectifier, and a frontal electrode plate electrically connected to the second secondary electrode plate via a connecting tool being arranged in order and bound to each other.

Abstract: A power supply construction comprises a logic circuit section housed in a frame, a power supply section mounted rotatably on the frame in opposed to the logic circuit section for supplying power to the logic circuit section. Relay bars with an end arranged in the vicinity of the rotating axis of the power supply section are provided for supplying power to the logic circuit section. Power supply bars with an end arranged in the vicinity of the rotating axis are for outputting the voltages from the power supply section. In addition, a flexible conductor is provided for electrically connecting the relay bar and the power supply bar in such a manner that the power supply section is rotatable.

Abstract: Disclosed herein is a power module which is simple in assembly and which allows efficient release of heat generated by a converter transformer and power devices on primary and secondary circuits which are electrically separated from each other. The power module is of a construction such that a converter transformer, a primary circuit board on one side of which a part of the primary circuit of a switching power supply unit is integrated, and a secondary circuit board on one side of which a part of the secondary circuit of the switching power supply unit is integrated are three-dimensionally joined into an integral module by a resin of high thermal conduction and electrical insulation properties, the device-mounted sides of the primary and secondary circuit boards facing each other. The transformer may be placed between the two circuit boards or, alternatively, in parallel and adjacent to the two circuit boards.

Abstract: A heat sink mounting assembly for heat producing devices has a mounting plate with a plurality of positioning areas in which the heat producing devices are fixedly mounted by cooling fins punched out from the mounting plate and which leave convection openings through which cooling air circulates, the cooling fins and convection openings being proportioned to provide maximum cooling effect.

Abstract: Electronic power supply comprising a framework having front and rear sides and top and bottom sides and having a vertically disposed space extending upwardly from the bottom of the framework through the top of the framework. It also is comprised of a plurality of power modules disposed in the framework and having heat sinks extending into the vertically disposed space. Fans are provided for forcing air in a vertical direction through the space.

Abstract: A metal base plate has two spaced thermally conductive ceramic bars fixed to one surface. The outwardly facing surface of the bars has spaced conductive pads. A plurality of diodes which are of alternating opposite polarity have axially extending leads extending between the bars in spaced parallel relationship with respect to one another, and are soldered to the conductive pads on the bars to define a series connection of the diodes. The suspended diodes and their leads are then encapsulated in a body of polymerizable material containing thermally conductive electrically insulative particles suspended therein such that the particles occupy more than about 75% of the encapsulating mass.

Abstract: Disclosed is an improved rectifier assembly for use in a rotor of a dynamo electric machine which includes a tubular housing receiving a stack of plates sandwiching diode wafers between studs on certain of the plates and confined by annular ridges on others of the plates. The plates are provided with coolant passages with the coolant passages on adjacent plates being staggered to provide improved impingement cooling.

Abstract: A bridge rectifier for a diode-rectified alternating current generator that is comprised of two metallic heat sinks formed respectively of copper and aluminum that are separated by an electrical insulator. Each heat sink carries a plurality of semiconductor diode chips. The diode chips are electrically connected to electrical connectors that are insert molded to insulator blocks that are supported by one of the heat sinks. The electrical connectors are adapted to be connected to the phase windings of an alternating current generator. The aluminum heat sink has a finned area which is adapted to be contacted by cooling air when the bridge rectifier is mounted in the generator.

Abstract: An air cooled diode-rectified alternating current generator for use on motor vehicles. The generator has an internal fan located within the slip ring end frame and an external fan located adjacent the outer wall of the drive end frame. The internal fan cooperates with a baffle having a central opening and forces cooling air between air inlet openings and air outlet openings formed in the slip ring end frame. The air that traverses this path cools one end of a stator winding and a bridge rectifier. The external fan causes a flow of air between air inlet openings and air outlet openings formed in the drive end frame and this air contacts an opposite end of the stator winding. The cooling arrangement also provides for a flow of cooling air from the air inlet openings in the slip ring end frame to the air outlet openings in the drive end frame.

Abstract: A high voltage semiconductor valve has a plurality of electrically series-connected semiconductor elements, for example thyristors or diodes. These are designed for pressure contact connection and for double-sided cooling and are arranged alternately with liquid cooling bodies in a stack. At least some of the resistors included in the voltage divider of the valve are arranged with their resistive portions located in a passage in the cooling body between the contact surfaces for the two adjacent semiconductor elements.

Abstract: A transformer arrangement for generating rectified, high voltages has a primary winding wound around the transformer core and is surrounded by a metallic shield. A mass of insulation material, including an insulation layer, surrounds the metallic shield. A secondary winding is embedded in the mass of insulation material outside the insulation layer. The secondary winding has an end terminal carrying a high alternating voltage potential and presents an outer circumference. A heat conducting metal band rests on and covers a major portion of the outer circumference of the secondary winding but does not constitute a short-circuit winding for the transformer. The terminal end of the secondary winding is connected electrically and thermally with a plurality of rectifiers via the metal band.

Abstract: A unitary housing (10) characterized in that it has an outlet (13) arranged to receive an electrical plug via an electrical voltage converter, as defined, said converter being connected on or in said housing to an electrical plug with multiple inlet pins (I.sub.2 I.sub.3 I.sub.4 I.sub.5) that are able to be arranged readily to fit the various geometries (FIGS. 5.sub.A -5.sub.D) of electrical voltage power outlet sockets to be found in the different major countries of the world.

Abstract: A high voltage DC power supply has a transformer rigidly mounted within a tank containing fluid and a support assembly, which houses various electrical components, detachably mounted therein. The support assembly, which forms a ladder-type arrangement, is held in a vertical position and at a distance away from any wall within the tank. A flexible strap containing plugs connects to mating sockets on the support assembly for electrically coupling the transformer to the electrical components housed in the support assembly.

Abstract: A power rectifier arrangement comprises at least one heat sink and at least one power rectifier. The housing floor of the power rectifier is at least partially designed as the input terminal. The secondary winding of the transformer is designed as a ribbon. The power rectifier serves as a fastening element which is screwed to the heat sink and with which the end of the ribbon is pinched between the housing floor and the heat sink. In case at least two power rectifiers are connected in parallel, the ribbon exhibits a plurality of superimposed, electrically-conductive layers corresponding to the plurality of power rectifiers and each of the electrically conductive layers is respectively connected to one power rectifier. An electrically-insulating and thermally-conductive layer is provided between two electrically-conductive layers.

Abstract: In a water-cooled high voltage device, a plurality of electrical modules are divided into a plurality of electrical units. The electrical modules are cooled by cooling water supplied from a pump through pipes which are disposed in the electrical units, respectively. The size of the pipe diameter is determined to be enough to allow cooling water to flow at a relatively low pressure and to properly cool the electrical modules.

Abstract: A brushless rotary machine such as a brushless motor or a brushless generator is provided with first and second shafts. A rotor is fixed to the first shaft and rotated with the rotation of the first shaft, and magnetized when the rotor is fed with DC current. AC generator is mounted to the second shaft and generates AC current with rotation of the second shaft. The first and second shafts are separated and coupled to each other by a coupling mechanism having a space between the first and second shafts. In the space is provided a rectifier which is electrically coupled with the AC generator and the rotor, rectifies AC current generated by the AC generator into DC current and supplies the DC current to the rotor, thereby to magnetize the rotor.

Abstract: A rectifying device is improved by arranging heat exchanging cooling pieces positioned on either side of the rectifying element in series with respect to a flow direction of cooling air circulating through the device. A sleeve element may cover the cooling pieces and the rectifier for channelling the air and reducing the spacing required between adjacent rectifier elements.

Abstract: High-voltage rectifier having a plurality of serially connected semiconductor components, including a substantially cylindrical shielding formed of a plurality of sections electrically isolated from one another, each of the sections containing at least one of the semiconductor components, the shielding sections being formed as cooling bodies defined at one side thereof by a cylinder-segment surface, at least two of the cooling bodies forming a group and being disposed in spaced relationship to one another in a common plane so that the cylinder-segment surfaces thereof define a nearly complete cylinder, the cooling bodies having cooling ribs at a side thereof opposite the respective cylinder-segment surfaces thereof, the respective semiconductor components being connected thermally and electrically conductively to the respective opposite sides of the cooling bodies.

Abstract: A three-phase bridge circuit includes two sets of transistor/diode assemblies in which the diode of each assembly is connected in reverse current mode across the main current path of its transistor. Each diode of one set has its cathode connected to a positive d.c. input bus bar and its anode to a respective a.c. output bus bar. Each diode of the second set has its cathode connected to a negative d.c. input bus bar and a respective a.c. output bus bar. An input terminal has a plurality of electrical contacts, each connected to the control electrode of a respective transistor in the transistor/diode assemblies. A heat sink has its electrically insulating layer on one major surface thereof and in thermal contact therewith. Each transistor is in thermal contact with the heat sink by way of a bus bar part, and each of the bus bar parts is secured to the insulating layer so as to be in thermal contact with the heat sink.

Abstract: A high voltage DC power supply having a transformer and other electrical components housed within a tank containing fluid. A transformer is rigidly secured to the tank. There is further provided a compact, easily removable insulated support assembly for carrying at least a major portion of the other electrical components including rectifiers. The support assembly is removably secured and suspended by a support structure so that the support assembly extends within the tank independent and free of attachment to other portions of the power supply. A top of the tank is formed of a first cover and a second removably secured cover for covering an opening in the tank only substantially large enough to receive the transformer. The support assembly by itself may be quickly installed and by itself quickly removed.

Abstract: A transistor control unit for a servo motor has its control part and its power part arranged on a single printed circuit element. The control part and a cooling body, power transistors and power diodes of the power part are located side-by-side on one side of the element, the current connections being on the other side. Resistance arrays in flat rectangular housings are mounted end-on on the element with their main surfaces vertical when the element is mounted in position.

Abstract: A set of power semiconductors equipped with firing transformers and with protection circuits. Circuitry is disposed in such a way that the connections between the thyristor (2,3), the transformers (11) and the protection circuits (9,10) are shortened. To do this, the components (9, 10, 11) are disposed on circuit boards (7,8) whose planes are parallel to the axes of the columns (2,3) of thyristors. Applications to energizing railway traction motors.

Abstract: An AC-DC electric power converting station is provided wherein circuit lines consisting of converter transformers/ positive and negative polarity valve structures/ DC reactors/ DC circuit breakers are of L-shape and inverted L-shape. The positive and negative polarity valve structures are so arranged that their surfaces in the longitudinal direction face each other. The converting transformers are arranged along the other surfaces of the positive and negative polarity valve structures in the longitudinal direction thereof. The DC reactors and DC circuit breakers are series-connected in the vicinities of the outputs in the direction of width of the positive and negative polarity valve structures. AC and DC switchgears of gas insulated type are arranged to face each other so that they sandwich the positive and negative polarity valve structures therebetween. Conduit air cables connect the positive and negative polarity valve structures and the AC and DC switchgears.

Abstract: A highly compact rectifier unit constituted by a sub-assembly potted within an insulating case having a metal base plate of high thermal conductivity to provide a heat sink for dissipating heat generated by the sub-assembly to enhance the current rating and to reduce the thermal impedance of the unit. The inner face of the base plate is porcelainized to form a thin insulating film thereon electrically isolating the sub-assembly from the plate. The surface of the insulating film is metallized to define separated metallic zones thereon which make contact with correspondingly-positioned conductive base straps of the sub-assembly to create a thermal bridge between the sub-assembly and the base plate.

Abstract: A converter adapted to be mounted within an opening in a wall of a recreational vehicle comprising a receptacle adapted to be received within the opening and an openable cover plate attached to the receptacle to provide access to the interior of the receptacle. A base mounting plate is mounted in the receptacle and a plurality of circuit elements, including a step-down transformer, is mounted on the base mounting plate. Ventilation air is provided through vent openings in the cover plate. By utilizing high frequency alternating current, transformer size is reduced and transformer hum is eliminated.

Abstract: In a rectifier circuit structure, particularly for automative use, a diode array is in the form of a column and includes a Zener diode in the column which serves to protect the rectifier diodes of the arrangement and to protect an electrical load system coupled to the output of the diode array.

Abstract: A high voltage power supply used to transfer three-phase a.c. energy to d.c. at full rated power over a large range of output voltages. The electric and magnetic circuits are arranged according to the core type of construction wherein three legs of the iron core extend axially and have the primary coil wound along their full length. The core legs are joined for magnetic circuit continuity at the extremities. A plurality of high voltage decks each having three secondary winding modules mounted and interconnected are stacked axially over the axially extending iron core pieces. The secondary coils on each high voltage deck are interconnected in several three-phase connections, to produce a phase shift in the ripple of the d.c. output voltage of the various decks. A high voltage bridge rectification circuit mounted on each deck produces full wave rectification of the ouptut.

Abstract: Two U-shaped sheet metal members having legs through which the cooling air passes have bases onto which at least two of the load current carrying diodes are fastened, the connection between the diodes and the sheet metal members forming the heat sink being a highly heat conductive connection.

Abstract: In a rectifier in which button diodes are mounted in pairs as columns on bases which also constitute heat sinks, the connector connecting the diodes to the AC phase is made of a material which has high thermal and electrical conductivity. The columns are fastened to the base-heat sink by use of additional heat sink members which in turn are fastened to the base by bolts or screws. The latter are electrically insulating. The base-heat sink is star-shaped, the diode columns being mounted on the rays of the star. Preferably, the additional heat sink members have extensions which increase their effective cooling area.

Abstract: In an output stage for switching regulated power supply, including a step down transformer and a full wave rectifier, significantly increased power output and a small, compact size are achieved by reducing the length of the path through which electrical power must flow in the power supply, by symmetrically arranging all electrical paths within the power supply, and by utilizing single turn windings, each associated with a diode rectifier element. Two groups of diodes are respectively mounted on two heat sinks which are arranged in parallel co-planar relationship under a circuit board on which the transformer is mounted. In a first embodiment, the first group of diodes is forwardly mounted on the heat sink, that is, with their anodes exposed, while the other diodes are reversely mounted on the other heat sink. In a second embodiment, all diodes are forwardly mounted on the heat sinks.

Abstract: A natural commutation static frequency converter including a polyphase cycloconverter and its control circuit, a switching device enabling breaking of inputs of two Graetz bridges of at least one of monophase cycloconverters, as well as breaking of outputs of the bridges which are not connected to neutral point. The switching device results in insertion of a self-inductance between opened outputs of the Graetz bridges, and replacement of the control circuit of cycloconverter with a natural commutation rectifier-inverter control circuit, so as to form at least one natural commutation rectifier-inverter. The switching device further enables replacement of the outputs of the polyphase cycloconverter with the outputs of at least one rectifier-inverter so formed. The converter may be used to supply a synchronous motor.

Abstract: Cooling means for cooling a control such as for use in controlling the operation of electric vehicles or the like. The control utilizes a direct current battery power supply and includes an inverter for delivering alternating current to an alternating current motor of an air moving structure, such as a fan, provided for cooling the control during the operation thereof. The circuit is arranged to cause the fan to have variable power as a direct function of the load demand of the control circuit so that maximum cooling occurs when the load demand in the control is maximum and minimum cooling occurs when the load demand is minimum. The circuit is arranged to maintain an effectively constant volt-second duty cycle characteristic at the control power supply to the air moving structure whereby the variation in power developed by the motor thereof is a function of the duty cycle characteristics of the control power supply as applied to the motor.

Abstract: A heavy duty rectifier having rows of rectifier valves disposed on a rectifier bar which is forced circulation cooled is disclosed. A connecting bar is provided for each row of rectifier valves through which current is supplied to the valves. The rectifier valves are mounted on a broadside of the rectifier bar and the connecting bars are mutually spaced from each other and from the broadside of the rectifier bar. Terminals are provided on mutually facing surfaces of the connecting bars which are arranged at right angles to the broadside of the rectifier bar. The exterior surfaces of the rectifier bar define a first shape having a first area and the exterior surfaces of the connecting bars define a second shape having a second area with the first and second shapes and the first and second areas being substantially matched. Preferably the shapes are rectangular. This arrangement reduces the current deviation along the rectifier and connecting bars.

Abstract: A fluid-cooled thyristor valve including a plurality of series-connected thyristors that are cooled by non-conducting fluid flowing through electrically conducting cooling bodies positioned at the anode and cathode sides of the thyristors. The cooling bodies at opposite sides of adjacent thyristors are connected by fluid pipes that pass the cooling fluid. A plurality of electrically conducting sections of pipe connect the cooling body on the anode side and the cooling body on the cathode side of adjacent thyristors to pass the cooling fluid in one direction and to electrically connect the thyristors in series through the electrically conducting cooling bodies. A plurality of electrically insulated sections of pipe connects the cooling body on the cathode side and the cooling body on the anode side of adjacent thyristors to pass the cooling fluid in the opposite direction.

Abstract: A cooling plate of the unit is connected to each of the a.c. terminals of the alternator and each cooling plate carries the positive-side diode or diodes, the negative-side diode or diodes and the excitor field diode connected to that a.c. terminal. The cooling plates are mounted on a shaped insulating disk in which wires are embedded for connecting together the connection leads of the diodes. Provision is made for bringing out terminals for the connection of a regulator unit and for bringing out a terminal for one a.c. phase, as well as for attachment of the d.c. output terminals.

Abstract: A semiconductor and heat sink assembly of the type having two groups of semiconductor devices only one group of which is operable at any instant in time has the semiconductor devices arranged, with respect to the heat sink portion of the assembly, in a divided manner such that maximum utilization is made of the heat sink to thereby provide improved duty cycle capabilities.

Abstract: A sealed DC power converting station is provided with a bus bar group disposed at the central portion of the station and first and second groups of sealed controlled semiconductor switching units disposed on the opposite sides of the bus bar group. The switching units are respectively connected to the bus bar group through disconnectable gas insulated connection ducts. The station further includes a sealed smoothing reactor connected in series with a DC transmission line and arrestors provided for respective gas insulated connection ducts.

Abstract: An improved high current low voltage switching regulator power supply in which the major heat producing components of the power modules of the power supply are mounted on a pair of chill plates with a liquid cooled heat exchanger between the plates. The chill plates are electrically isolated from each other and the heat exchanger. One chill plate also serves as the positive power output bus and the other as the negative power output bus of the power supply which significantly reduces the parasitic inductance of the power supply.

Abstract: A high current-rectifier arrangement comprising a movable contact body which is of substantially piston-like structure and arranged with radial play in a cylinder-like compartment or chamber formed in an associated contact element and surrounded at its periphery by a connection line which bridges the radial play to the inner wall of the compartment. Furthermore, cooling agent-channel means of such contact body are arranged in offset relationship at the periphery thereof with respect to the connection line and sealingly connected with cooling agent-channels provided in the connection element.