Abstract: An improved commutator heat dissipating device for alternators, the commutator including a heat dissipating plate, a base plate, a top cover, terminals, and diodes. The heat dissipating plate has a body including a plurality of recesses for receiving the diodes, and a plurality of integrally connected wavy cooling fins on an opposite side thereof. An insulation plate is disposed between a bottom side of the body and the base plate. Securing posts pass through through holes in the heat dissipating plate to secure the heat dissipating plate and the base plate. The terminals include insulating elements and conductive plates. The insulating elements are capable of positioning the terminals by means of limiting blocks and posts of the heat dissipating plate to enable the conductive plates to be soldered with the diodes. The commutator has excellent heat dissipating effects and enhanced structural strength to achieve smooth operation of machine elements.

Abstract: A drive unit which uses an electric motor as a power source and has an integrated inverter, with a cooling circuit for the electric motor and the inverter. The drive unit includes a drive unit case, the electric motor housed within the case, and the inverter fixed to the case. A coolant flow passage is provided between the drive unit case and the inverter. The inverter is fixed to the drive unit case through a panel wall, and a partition divides the coolant flow passage into chambers which are coextensive in parallel. As a result, the coolant which flows through the coolant flow passage acts as a two-stage heat shield, barring the heat generated by the electric motor from being transmitted to the inverter.

Abstract: A compact multiple output power supply which has a circuit architecture with distinct primary and secondary circuit domains. Within the secondary circuit domain, a distribution bus of relatively low constant voltage supplies power inputs to d.c.-to-d.c. converters providing regulated outputs and operating independently of each other. Because of the secondary circuit domain topology, surface mount components are made available in conjunction with relatively simple converter circuitry. Heat management within the compact housing of the power supply is achieved through the utilization of linear driven air flows in combination with employment of heat sinks extending to the heat sink configured cover of the housing. Additionally, the highest heat generation components are positioned rearwardmost within the driven air path.

Abstract: A device for supervising the cooling of a cooling system of a valve of a high voltage converter station located on high voltage potential level comprises members (31) located on high voltage potential level and adapted to detect the temperature at cooling blocks (32) of the valve on high voltage potential level and send values so detected to first control units (3) for controlling semiconductor components (4) of the valve. The first control units have means (20) for treating said values detected and the first control units are adapted to send data resulting from said treatment to an arrangement (16) for supervising said valve located on low potential level.

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: 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: An electronics case, a method of manufacturing the same and a power module incorporating the case. In one embodiment, the case includes: (1) an enclosure including a metal substrate and a dielectric material located on inner surfaces of the enclosure that insulate the substrate from electronics components located within the enclosure, the enclosure having an aperture on a major surface thereof and (2) an electrically conductive pin, passing through the aperture and an interior of the enclosure to emerge from the enclosure at a point opposite the major surface, the pin functioning both as a heat sink mount for the case and a case ground pin for the substrate.

Abstract: An electric power conversion assembly includes switching elements for converting electric power by switching, a drive circuit portion for driving the switching elements, a smoothing capacitor for suppressing fluctuations in the voltage from a direct-current power supply supplying the switching elements, and a control circuit portion for controlling the switching elements by outputting a control signal to the drive circuit portion, the smoothing capacitor including ceramic capacitors.

Abstract: A power conversion system that is capable of achieving low inductance, improving cooling performance and making the external shape of the entire system small, is achieved by combining a plurality of single phase inverter units. The inverter units include four device packages each of which is composed of four packaged power devices, two neutral point clamp diodes, two by-pass diode packages and clamp diode packages. Each by-pass diode packages is composed of two packaged by-pass diodes. The clamp diode packages are composed of packaged clamp diodes. The by-pass diode packages are provided on one of the wall surfaces of the clamp diode package, and the device packages are provided on an outside wall surface of the by-pass diode package.

Abstract: A method and apparatus for powering a high power load (on the order of 50,000 watts or more) can have an input from any of a plurality of different voltage sources, AC or DC. In one embodiment, the AC sources can have a frequency in the range of 162/3-60 Hertz, and voltages in the range of 480-38,000 volts. The method and apparatus feature cryocooling inverter electronics, which converts an input signal to a high frequency high voltage signal, to, for example, less than about 180K. A high frequency transformer receives the high frequency high voltage signal and transforms it into a desired voltage level which can then be filtered and/or demodulated and applied to the load. The transformer is preferably comprised of a superconducting material, and then, the inverter and transformer, at least, are actively cooled as required. In a particular embodiment, the circuitry replaces the heavy transformer construction used in driving induction motors in an electric traction engine from an overhead line or a third rail.

Abstract: Capacitors and power electronic components, such as power switches of hybrid configuration, are positioned with low inductance and in close proximity to each other on one said of an intermediate-circuit assembly, below a flat intermediate-circuit bus. The bus and the capacitors and power electronic components are electrically and conductively connected. An electrically insulated and heat-dissipating cooling body is positioned on the other side of the intermediate-circuit assembly. At least a portion of the converter circuitry or the entire converter is arranged in a single housing. The result is a compact and reliable electronic circuit arrangement for a converter.

Abstract: Power module for a current converter, particularly a frequency converter, having at least one printed circuit board equipped at least with power components and having a heat-conducting connection with a wall of the current converter housing serving as heat sink, the power module having electrically conducting connection parts arranged vertically to the housing wall, which parts laterally confine a chamber and are long enough to enable accommodation of large, passive electrical components, such as capacitors, in the chamber. To ensure a space saving embodiment of the power module, though maintaining a sufficient heat dissipation and simplifying the electrical connection between the power module and the remaining components of the converter, it is provided that the only electrical connection between the power module and other electrical components of the converter as well as to the supply mains and to a load supplied via the converter is established via the connection parts.

Abstract: A power supply and a method of manufacturing the same. In one embodiment, the power supply includes: (1) a substrate, (2) a main power supply mounted on the substrate and having an input and a main output, (3) an auxiliary power supply mounted on the substrate, coupled to the input and having an auxiliary output and (4) a cooling device mount, coupled to the power supply, configured to receive and support a cooling device, the auxiliary output configured to provide electric power to the cooling device.

Abstract: Modular power supply apparatus wherein a plurality of d.c.-to-d.c. converters are coupled to an internally structured heat exchange channel through which fan driven air is passed in an unobstructed manner along a flow axis. Each of the converter modules is combined with a dedicated module circuit board which provides regulated output terminals in an orientation or direction arranged transversely to the flow axis. The opposite end of the module circuit boards are plugged into a main interconnect circuit board positioned along one side of the heat exchange channel. A support channel is provided outwardly of the main interconnect circuit board within which principal components of supporting circuitry are contained.

Abstract: A power supply module package suitable for both high packaged power density and cost effective manufacture. In an exemplary embodiment, the power supply module includes: (1) at least one printed circuit board containing conductors for interconnecting components of the power supply, (2) a thermally conductive baseplate or case operable for transferring heat generated inside the module to the outside environment, wherein the external package dimensions are of a sufficiently small size to allow the user the greatest flexibility in the design of the overall circuit assembly, (3) at least one power magnetic device operable for providing electrical isolation between the input and the output of the power module, and (4) a set of electrical leads to facilitate communication and power flow between the module and circuitry being powered.

Abstract: The invention provides an alternator for motor vehicles, in particular having a dissipator with one or more orifices designed to receive one or more press-fit diodes. An adaptor generally in the form of a disk has an outline enabling it to be engaged as a press-fit in a respective orifice of the dissipator. The adaptor has at least one plane face enabling a solder-mounting diode to be soldered thereto. The invention also includes the adaptor itself.

Abstract: A control circuit generates signals for controlling the sequence in which selected input signals are carried across the terminals of a polyphase switching conversion circuit. The control circuit includes switching elements galvanically isolated from the selected input signals with the control signals electrically isolated from the switching devices. The control circuit for the conversion circuit is, in essence, electrically isolated from the conversion circuit. The control circuit is configured to have a topology analogous to that of the switching converter and includes conventional switching diodes as well as a light generating device optically coupled to a light sensor which, in response to detection of light from the optically coupled light generating device, provides a control signal to a corresponding switching device. The control circuit also includes a source of regulated and electrically isolated power to operate drive circuitry for the switching devices.

Abstract: A larger-diameter fin is provided adjacent to a frame, while a smaller-diameter fin is provided adjacent to a protecting cover. The larger-diameter fin and the smaller-diameter fin are arranged parallel to each other in an axial direction with an intervening clearance so that their rectifying elements are disposed at opposite directions each other. The larger-diameter fin is offset outward in a radial direction. The smaller-diameter fin is offset inward in the radial direction. The protecting cover has an axial opening which introduces external air directly to the positive rectifying element. Furthermore, a radial ventilation passage is formed between the larger-diameter fin and the frame so as to pass the central position of the negative rectifying element. An opening, introducing external air directly, is formed at a radial-outer end of the radial ventilation passage.

Abstract: A power supply/backplane assembly and system wherein a substantially flat power supply assembly including a printed circuit, power converter modules, and heat sink is mounted directly to the rearwardly disposed surface of a backplane. The size of the power supply and the region at which it is mounted substantially falls within the border of a fully defined region of the backplane. Flat copper traces carried by the power supply circuit board function to carry regulated power directly to the backplane via a power bolt system. Thus, conventional cabling is eliminated. The circuit board also is employed in conjunction with readily accessible connector components to provide for simplified wiring installation of support features such as the interaction between a supervisory panel and a front end a.c.-to-d.c. conversion component.

Abstract: A thin power supply is configured to be mounted vertically within a card cage for pin assembly connection with the forward face of a backplane. Through the utilization of a vertical flat metal platform in combination with a thin sheet metal folded fin array, the components of the power supply may be cooled by fan driven air of passing through the card cage itself. To achieve heat dissipation, those components of the power supply which exhibit higher heat dissipation characteristics are firmly coupled with the power supply platform such that the bulk of the heat generated by them is dissipated by the folded fin array and the card cage fan driven air passing over and through it. Other components not having high beat dissipation characteristics are circuit board mounted and cooled by the movement of fan driven card cage air flow which passes through the housing of the power supply.

Abstract: A yarn winding apparatus for winding a plurality of continuously advancing yarns into cross wound packages, and which includes a rotatable revolver which mounts a pair of winding spindles which are alternately moved between a winding position and a doffing position. A beam-like carrier supports a yarn traversing mechanism and a sensor roll for each package being formed, and the drive electronics and the control electronics are combined in a control unit which is mounted on the outer end portion of the length of the carrier.

Abstract: A multilayer circuit board system or laminated circuit board system for use in a motor controller includes a motherboard, at least one power substrate circuit board, and a capacitor circuit board. The mother board includes mounting areas for receiving the power substrate board and capacitor circuit board at a 90.degree. angle. The capacitor circuit board, power substrate circuit board, and mother circuit board can be interconnected without the use of external connectors or wires. A fan can be disposed at a front edge of the power substrate circuit boards to provide air flow across their planar surfaces.

Abstract: A power supply and a method of manufacture therefor. The power supply includes: (1) a circuit board containing conductors for interconnecting electrical components of the power supply, (2) a thermally-conductive case having an integral electrically insulating layer, the thermally-conductive case forming a reservoir to receive the circuit board therein, (3) a power semiconductor device having a body connected in thermal communication with the thermally-conductive case and terminals coupled to the conductors of the circuit board, (4) an encapsulant, located within the reservoir, the encapsulant ensconcing the power semiconductor device and the electrical components and (5) electrical leads extending from the power supply that allow the power supply to be coupled to a printed wiring board.

Abstract: The invention is a converter-fed drive system having at least one drive motor fed by a converter unit. The converter unit has a valve assembly containing semiconductor valves, a cooler for cooling the semiconductor valves and a capacitor assembly are mounted directly on the drive motor. There is also an inductor assembly, that is electrically connected to the converter unit, but is installed such that it is spatially separated from the converter unit and the drive motor. The cooler is simultaneously used to cool the drive motor as well as the converter unit.

Abstract: A multilayer circuit board system or laminated circuit board system for use in a motor controller includes at least two motherboards, at least one power substrate circuit board, and a capacitor circuit board. The circuit boards are mounted in an aperture or trench within each mother board. The power substrate module circuit board includes a mounting area provided in a recess, window or portion of the circuit board where the circuit board is only a single layer thick. The single circuit board layer at the mounting area provides a heat conductive yet highly electrically insulated mounting area for receiving a heat sink. The heat sink can be mounted on a side opposite the electrical device. The capacitor circuit board, power substrate circuit board, and mother circuit boards are interconnected without the use of external connectors or wires. The use of two mother boards increases the rigidity of the circuit board system.

Abstract: An inverter includes an inverter circuit, a rectifier circuit, a filter circuit including an input side capacitor, a coil, and an output side capacitor, the filter circuit being disposed at a front stage of the rectifier circuit, a casing accommodating the inverter circuit, the rectifier circuit and the filter circuit, a first cooling chamber defined in the casing, a second cooling chamber defined in the casing and partitioned by a partition wall from the first cooling chamber so as to be adjacent to it, a plurality of vent holes formed in the partition wall, and a fan for supplying a cooling air into the first cooling chamber and further via the vent holes into the second cooling chamber. The inverter circuit is cooled by the cooling air flowing into the first cooling chamber and the coil of the filter circuit is cooled by the cooling air flowing through the second cooling chamber.

Abstract: The present invention relates to a stack device comprising a stack of gate turnoff thyristors GTO, of freewheel diodes DRL, and of diodes D, for a semiconductor circuit, said stack device including power supply electrical connection terminals +HT and -HT, and an output terminal PM, together with electrical connection terminals Cs and Cc between said diodes Ds and Dc and a protection circuit P, wherein the geometrical organization of the wiring of said electrical connection terminals +HT, PM, and -HT is predetermined so as to enable the disposition of said thyristors GTO and of said freewheel diodes in said stack to be modified in order to obtain different electrical functions for the semiconductor circuit.

Abstract: A rectifier bridges assembly for use with an automotive alternator includes a base plate conductively mounted to a ground and providing a negative heat sink, and an overlying finned positive heat sink structure having a surface area at least twice that of the base plate, which adjoins the base plate to cooperatively define a chamber therebetween. When utilized in connection with a standard 3-phase type AC electrical generator, three stator connection terminals are provided that each include an upper portion which extends through the positive heat sink structure in a non-conductive relation, and a lower portion disposed within the chamber and supported therein by a thermo-conductive, nonelectrically-conductive epoxy. Three diodes disposed within the chamber extend between the baseplate and respective ones of the stator connection terminals. Three additional diodes are disposed within the chamber between the respective stator connection terminals and the overlying positive heat sink structure.

Abstract: A capacitor-type power supply unit includes a capacitor block. The capacitor block has a plurality of capacitor cells and bus bars connecting the capacitor cells in series. A plurality of electronic circuit boards are connected respectively to the capacitor cells, for controlling corresponding ones of the capacitor cells. The electronic circuit boards and the bus bars are mounted on the capacitor cells.

Abstract: A dynamoelectric machine having a stator housing or frame made by a lost foam process utilizing a unitary single-piece vaporizable pattern. The stator housing may be made from a molten metal such as cast iron or aluminum, and has an annular wall having integral outwardly extending longitudinal cooling fins, mounting foots pads and a conduit box support pad. The lost foam process enables the cooling fins to have a greater effective cooling fin height to housing diameter ratio and greater effective cooling fin height to housing annular wall thickness ratio than obtained with prior sand casting processes. The greater height fins provide increased strength and rigidity for the annular wall which can be made radially thinner than prior stator housing or frames of similar size. Substantial savings in material and labor are realized by the stator housing.

Abstract: A VSC converter has each current valve of a phase leg formed by a plurality of units of semiconductor elements and rectifying members, located on top of each other forming at least one stack. The phase leg is constructed according to the flat cable principle with the phase leg formed by such stacks arranged side by side in pairs at small distances (d) running back and forth. A cooling plate of electrically conducting material is arranged between each unit in the stacks.

Abstract: A power supply and a method of manufacture therefor. The power supply includes a circuit board containing conductors for interconnecting electrical components of the power supply and a thermally-conductive case having an integral electrically insulating layer. The thermally-conductive case forms a reservoir to receive the circuit board therein. The power supply further includes a power semiconductor device having a body connected in thermal communication with the thermally-conductive case and terminals coupled to the conductors of the circuit board. The power supply still further includes an encapsulant, located within the reservoir, capable of ensconcing the power semiconductor device and the electrical components. Additionally, electrical leads extend from the power supply that allow the power supply to be coupled to a printed wiring board.

Abstract: A power supply adapted to be driven by a primary power source to produce an output voltage. The supply has a case with a bottom wall, an air inlet, an air outlet, and an enclosed chamber bordered by the bottom wall, the air inlet and the air outlet. The bottom is adapted to rest on a horizontal surface to define an upward direction within the case. The air inlet is operable to deliver air into the case along an incoming passageway having components directed inwardly and upwardly to prevent liquid that falls atop the case from intruding into the case. A power converter mounted in the case is adapted to be connected to the primary power source for producing the output voltage. The power supply also has a fan mounted in the case between the air inlet and the air outlet for providing a separated pair of airflows downstream and upstream of the fan. The pair of airflows pass across different portions of the power converter.

Abstract: A rectifier excellent in terms of heat sink performance, product quality, and cost including a one-way conducting device for rectifying an alternating current, wherein the one-way conducting device includes a metal base serving as one electrode and having a side surface portion and a seating surface portion; and a metal heat dissipation member, including a socket section for receiving the metal base, for dissipating heat generated at the one-way conductive device, wherein the socket section of the metal heat dissipation member has a side wall portion firmly engaged with the side surface portion of the metal base and a bottom portion in contact with the seating surface portion of the metal base.

Abstract: A power supply apparatus includes a housing containing therein a component which generates heat when operating, a fan for cooling the heat-generating component, and a driving unit for driving the fan. The housing also contains therein a temperature detector for detecting the temperature in the housing and providing a detected-temperature representing signal. In response to the detected-temperature representing signal, a control unit provides the driving unit with a control signal to change the rotation speed of the fan.

Abstract: Methods and apparatus for uninterruptible power supply (UPS) systems are provided. The UPS systems are configured to provide the advantages of an in-line device, and operate in a quasi-standby mode. The UPS includes a rectifier unit and inverter arranged to nominally deliver a portion (e.g. up to about 20%) of the primary AC power supply to a critical load through an output transformer. The rectifier unit preferably includes internal energy storage capabilities, such as a capacitor and inductor. The remaining portion of the AC power supply is nominally supplied directly to the critical load and is controlled by a transfer switch and the output transformer. When a fault is detected in the main AC power supply, the transfer switch switches to a faulted position and power is supplied from the rectifier inductor and capacitor or from a battery to the load through the inverter.

Abstract: An adaptable rotating rectifier and suppression resistor assembly is designed to fit and mate with state-of-the-art, two-pole generators with maximum flexibility to accept a variety of known possible diode configurations and a relatively large suppression resistor in a cost effective manner. A tubular housing of the assembly has an axially extending internal cavity with a plurality of bus bars arranged in fixed, spaced relation in a radially outer portion of the internal cavity so as to extend axially along the internal cavity. A plurality of diodes of any one of at least three significantly different configuration diodes and a suppression resistor are arranged in line along the axis of the internal cavity with radially outwardly extending spring contact plates electrically connecting the diodes and suppression resistor with the bus bars. A desired preload force is provided on these components between an end cap at one end of the housing and a retainer at the other.

Abstract: A cubicle which houses an inverter provided a tube which is placed to creep in a zigzag along the surface of at least one wall of the cubicle, preferably the wall on which a switching element is attached, and in which a cooling liquid is flown.

Abstract: The present invention relates to a power supply system which can provide a dual air flow control and heat reduction in an electronic device having a regular fan. The power supply system has an additional backup fan operating independently from the regular fan and further comprises a thermal control circuit comprising a solid state temperature sensor for detecting ambient temperature changes inside the electronic device and a fan power drive electrically connected to the solid state temperature sensor as well as to the backup fan to turn on or off the backup fan in response to ambient temperature changes. The power supply system also comprises a pair of resistors connected respectively to the solid state temperature sensor to set a low and a high trigger temperatures based that the backup fan is able to make a proper response to ambient temperature changes provided, however, that the high trigger temperature shall be higher than the low trigger temperature.

Abstract: A battery isolator alternator bracket incorporating one or more heat sinks comprising at least one heat sink, the bracket formed of two segments, an upper closure segment, and lower base segment, the heat sinks formed preferably of extruded aluminum are shaped to conform to the interior of the bracket, each heat sink including a finned heat exchanger, having a terminal connecting at its front, being in electrical contact with a button diode, adhered thereto, with the terminals of each heat sink connecting either directly or by cable to the battery post of the alternator, for transmission of charge to the various batteries during alternator electrical generation.

Abstract: A method for providing thermal protection for forced air cooled power electronic semiconductors without direct measurement of semiconductor temperature, the semiconductors being mounted on a heat sink over which cooling air is blown includes the steps of computing the cooling air mass flow rate, creating an electronic model of the semiconductor/heat sink combination and estimating the semiconductor junction temperature from the mass flow rate and model. The cooling mass flow rate is determined by measuring the temperature of the cooling air prior to passage over the heat sink, measuring atmospheric pressure of the cooling air, determining the volumetric air flow rate of the cooling air and computing, from the cooling air temperature, pressure and volumetric flow rate, the cooling air mass flow rate. Power dissipation in the semiconductors is then computed and heat sink and semiconductor temperatures are estimated from power dissipation and cooling air mass flow rate.

Abstract: A switching power source unit has a constitution that the DC-DC portion 5 in which electronic parts are mounted on a metal core substrate and the AC-DC portion 6 in which electronic parts are mounted on a glass epoxy substrate are mounted in the same metallic outer cabinet 1, for example, the metal core substrate is attached on the heat sink 19 and the heat sink 19 is set in contact with the outer cabinet 1 so as to radiate heat from the metal core substrate.

Abstract: A rectifying unit for an alternator is composed of AC input terminal and cooling fins connected to output ends (including a neutral point) of a multi-phase stator coil, a negative-poled cooling fin which is grounded and fixed to a rear cover of the alternator, diodes whose anodes are soldered to the AC input fins and whose cathodes are welded to a positive output terminal, and diodes whose anodes are soldered to a negative-poled fin and whose cathodes are welded to the AC input fins.

Abstract: A rectifier arrangement for a three-phase generator having at least one power diode allocated to each half-wave of each phase and a cooling arrangement for the power diodes. The power diodes may be designed as diode chips and be arranged between two diametrically opposed heat sinks, while being oriented with respect to polarity and electrically and/or thermally conductive.

Abstract: An electronic variable speed drive including a cabinet having an opening door, a power system supplied with power from an AC line voltage and delivering a voltage under the control of solid state power switches and an electronic control system controlling the solid state switches. The cabinet contains, behind the door, a protective cover which protects the electronic control system and the power system which are disposed behind it. When the door is open, the protective cover protects users from the control and power systems.

Abstract: An indirect feedback type flyback converter that compares favorably with the direct feedback type flyback converter in controllability of secondary output voltage, wherein the converter is arranged so that a switching signal, which is induced in a secondary winding when a direct current input voltage, applied to a primary winding, is turned ON and OFF by a switching element, is smoothed by rectification and fed to a load and that an output voltage is detected using a switching signal induced in an auxiliary winding to transmit a control signal to the switching element for the purpose of stabilizing the output voltage; wherein the primary, secondary and auxiliary windings are formed on respective coil formation surfaces of a coil laminate as convoluted shaped conductor patterns disposed between a core hole at the center of the pattern and the border of the coil formation surface, with the auxiliary winding being disposed to be near the border of the coil formation surface.

Abstract: The rectifier arrangement, preferably for a three-phase generator for a motor vehicle, has at least one power diode of positive polarity and at least one power diode of negative polarity assigned to respective half waves of each phase of the three-phase current and a cooling arrangement for the power diodes, the power diodes of like polarity being arranged on respective heat sinks in an electrically and thermally conductive fashion, and the heat sinks being sandwiched together with at least one electrically insulating part (32) which contains the electrical conductors between the diodes and the three-phase winding.

Abstract: A cooling system is provided for an electric vehicle inverter system having an inverter for converting electric power from a battery into alternating current and for supplying the current to a driving motor for driving the vehicle. The cooling system employs a heat sink having an internal coolant flow passage for conducting a liquid coolant which is forced to recirculate. The heat sink is vertically placed on a mounting base, and heat generating parts are placed and fixed on at least one side of said heat sink. In this way, a cooling system for an electric vehicle inverter system which is small in size and large in cooling capacity with a simple construction is easily provided.

Abstract: An inverter device for changing direct current to alternating current for supplying to an electric motor which may be employed in an electric automobile. This inverter device includes a plurality of switching units, a cooling support member, capacitors, and pairs of first and second conductive plates. Each of the switching units has a box-like casing mounted on the cooling support member, and includes a positive switching element, a negative switching element connected in series, and positive and negative terminals. The positive and negative terminals are exposed on the upper wall of the casing. Each of the capacitors is arranged over an upper wall of the casing of a corresponding one of the switching units, and has positive and negative charge/discharge terminals.

Abstract: A design for and method of assembling a power supply or power converter. The design is based on mounting the heat generating elements of the device, such as an integrated circuit or other switching device in a manner which provides a direct thermal coupling between those devices and the inductors or transformers which are part of the power supply or converter Using packaging techniques similar to those used in the semiconductor industry, the inductor or transformer is attached to one side of a lead frame. The heat generating elements are then mounted on top of the inductor or transformer. Passive components, such as capacitors, may be mounted on the lead frame. Additional heat generating components may also be mounted on the inductor or transformer. The resulting combination is then encapsulated in plastic or a molding compound typically used in the industry.