Abstract: A dual-input 18-pulse autotransformer rectifier unit for more electric aircraft AC-DC converter uses an autotransformer with a nine-phase output to condition AC power prior to DC rectifying the AC power.

Abstract: A dual-input nine-phase autotransformer converts first and second three-phase AC inputs to a nine-phase AC output. The autotransformer includes input terminals for connection to a first three-phase AC input and a second three-phase AC input smaller than the first three-phase AC input. The autotransformer includes a first plurality of coils, a second plurality, and a third plurality of coils wound on respective phase legs of the autotransformer. The autotransformer includes a plurality of output terminals for providing a plurality of AC output voltages, and a plurality of internal terminals for connecting the first, second, and third plurality of coils in a configuration that provides a 40° phase shift in the AC outputs provided by the dual-input nine-phase autotransformer.

Abstract: A dual-input 18-pulse autotransformer rectifier unit for more electric aircraft AC-DC converter uses an autotransformer with a nine-phase output to condition AC power prior to DC rectifying the AC power.

Abstract: An electrical apparatus includes a magnetic core, and a bobbin extending about and partially covering the magnetic core. The bobbin is formed from a thermally conductive material. An electrical conductor forms a winding that wraps about the bobbin.

Abstract: A dual-input nine-phase autotransformer converts first and second three-phase AC inputs to a nine-phase AC output. The autotransformer includes input terminals for connection to a first three-phase AC input and a second three-phase AC input smaller than the first three-phase AC input. The autotransformer includes a first plurality of coils, a second plurality, and a third plurality of coils wound on respective phase legs of the autotransformer. The autotransformer includes a plurality of output terminals for providing a plurality of AC output voltages, and a plurality of internal terminals for connecting the first, second, and third plurality of coils in a configuration that provides a 40° phase shift in the AC outputs provided by the dual-input nine-phase autotransformer.

Abstract: The present invention relates to a leadframe having a plurality of connections for electrical conductors, a plurality of contacts and at least two outer current bars, and to a connecting socket having a leadframe as well as to a system for transmission of electrical power, in particular from a plurality of solar modules (photovoltaic modules), having a connecting socket such as this. In order to devise a leadframe which occupies as little space as possible, at least one connection (32a-e) is provided for an electrical conductor between the outer current bars (34a, b). This allows the leadframe to have a compact physical shape. The invention is based on the discovery that leadframes are used in the prior art to bridge the distances between predetermined contact separations, offering the possibility of producing, in one stamped part, strip conductors which have different geometries.

Abstract: A low pass filter includes a differential mode filter and a common mode filter. The common mode portion of the filter includes at least one inductor and one capacitor, as well as a damping circuit with at least one capacitor. The low pass filter has a reduced weight, which is useful in circumstances in which weight is a significant factor, such as in aircraft.

Abstract: An electrically insulating bobbin surrounds the magnetic core of an inductor. The bobbin includes a number of channels to receive wire for making an inductor. When wire is positioned in the channels, the wire is wound around the inductor core, but insulated from the inductor core and the other turns of wire. Because the bobbin insulates the turns of wire from each other and from the inductor core, bare rope wire can be used to wrap the inductor, resulting in reduced size and weight and improved ease of manufacture.

Abstract: Film capacitor assembly has a plurality of film capacitive layers for storing an electric charge. The plurality of film capacitive layers have a first metal contact and a second metal contact. A heat sink removes heat from the plurality of film capacitive layers. The heat sink is in thermal conductive communication with at least one of the first metal contact and the second metal contact. A dielectric material is configured to prevent a transmission of electric current through the heat sink from the plurality of film capacitor capacitive layers.

Abstract: An electrical inductor assembly comprises an inductor core having a circular shape, a wire guide that surrounds the inductor core and includes a plurality of slots, at least one of the slots forming a path winding around the inductor core, and at least one wire placed in one of the plurality of slots to form a winding. A method of forming an electrical inductor assembly comprises forming an inductor core having a circular shape, surrounding the inductor core with a wire guide, winding at least one wire around the inductor core along a slot in the wire guide, and applying an insulating material to the slot containing the at least one wire to electrically insulate the at least one wire.

Abstract: A low pass filter includes a differential mode filter and a common mode filter. The common mode portion of the filter includes at least one inductor and one capacitor, as well as a damping circuit with at least one capacitor. The low pass filter has a reduced weight, which is useful in circumstances in which weight is a significant factor, such as in aircraft.

Abstract: Film capacitor assembly has a plurality of film capacitive layers for storing an electric charge. The plurality of film capacitive layers have a first metal contact and a second metal contact. A heat sink removes heat from the plurality of film capacitive layers. The heat sink is in thermal conductive communication with at least one of the first metal contact and the second metal contact. A dielectric material is configured to prevent a transmission of electric current through the heat sink from the plurality of film capacitor capacitive layers.

Abstract: An electrical inductor assembly comprises an inductor core having a circular shape, a wire guide that surrounds the inductor core and includes a plurality of slots, at least one of the slots forming a path winding around the inductor core, and at least one wire placed in one of the plurality of slots to form a winding. A method of forming an electrical inductor assembly comprises forming an inductor core having a circular shape, surrounding the inductor core with a wire guide, winding at least one wire around the inductor core along a slot in the wire guide, and applying an insulating material to the slot containing the at least one wire to electrically insulate the at least one wire.

Abstract: An electrically insulating bobbin surrounds the magnetic core of an inductor. The bobbin includes a number of channels to receive wire for making an inductor. When wire is positioned in the channels, the wire is wound around the inductor core, but insulated from the inductor core and the other turns of wire. Because the bobbin insulates the turns of wire from each other and from the inductor core, bare rope wire can be used to wrap the inductor, resulting in reduced size and weight and improved ease of manufacture.

Abstract: An embodiment of a card holder system for retaining a card with an animal cage can comprise a card holder designed and dimensioned to selectively retain the card, and a retention member adapted for retaining the card holder to the cage. The retention member is adapted to be secured to a side wall of the cage. In certain embodiments, the card holder can be selectively retained in one of a horizontal orientation and a vertical orientation. The card holder system can further comprise an adapter member, the adapter member being designed and dimensioned to be coupled with the card holder such that the card holder may be selectively positioned in one of a first orientation and a second orientation, the second orientation being substantially rotated ninety-degrees from the first position.

Abstract: A ventilated cage and rack system. An embodiment of the invention may comprise a ventilated rack, the rack including at least one air exhaust plenum and at least one canopy disposed within the rack, the canopy being adapted to position a cage assembly below the canopy while maintaining a gap between the top of the cage assembly so as to permit air to be drawn into the air exhaust plenum from the interior of the cage assembly through the top of the cage assembly and to also permit ambient air to be drawn across the top of the cage assembly into the air exhaust plenum. The cage assembly comprises one of a first cage having a first width and a plurality of second cages having a second width, the second width being less than the first width.

Abstract: A contact extraction tool (3) for removing a contact (10) retained in a connector housing (20) defining cavities (22) therein and including cantilevered flexible latches 26 retaining the contacts (10) in corresponding cavities (22), each latch forming an inwardly projecting lug (260) for receipt in a corresponding latching windows (14) located along one side of the contact. The contact extraction tool includes a pair of registration posts (34) for aligning the tool to the housing and positioning inside corresponding cavities, an ejecting member (36) having a driving slope (360) in one side thereof for deflecting the latch to disengage the lug and the latching window and further removing the contact from the cavity, and anti-overstress means adjacent to the ejecting member for providing overstress protection and stability to said latch.

Abstract: A ventilated cage and rack system. An embodiment of the invention may comprise a ventilated rack, the rack including at least one air exhaust plenum and at least one canopy disposed within the rack, the canopy being adapted to position a cage assembly below the canopy while maintaining a gap between the top of the cage assembly so as to permit air to be drawn into the air exhaust plenum from the interior of the cage assembly through the top of the cage assembly and to also permit ambient air to be drawn across the top of the cage assembly into the air exhaust plenum. The cage assembly comprises one of a first cage having a first width and a plurality of second cages having a second width, the second width being less than the first width.

Abstract: An embodiment of a card holder system for retaining a card with an animal cage can comprise a card holder designed and dimensioned to selectively retain the card, and a retention member adapted for retaining the card holder to the cage. The retention member is adapted to be secured to a side wall of the cage. In certain embodiments, the card holder can be selectively retained in one of a horizontal orientation and a vertical orientation. The card holder system can further comprise an adapter member, the adapter member being designed and dimensioned to be coupled with the card holder such that the card holder may be selectively positioned in one of a first orientation and a second orientation, the second orientation being substantially rotated ninety-degrees from the first position.

Abstract: Prior power converters have utilized discrete components mounted on circuit boards of differing designs. Failure of one or more of the components requires testing each component to determine which is faulty. The faulty component must then be replaced. This results in significant down time for the inverter and can require stocking a large number of specialized boards. In order to overcome these problems, an inverter is assembled using modular circuit boards. Each circuit board includes components mounted on a multilayer substrate and a heat exchanger which cools high power components. When a malfunction of a component occurs, the entire board containing the failed component may be readily replaced so that inverter down time is minimized. The use of modular circuit boards also reduces stocking requirements and inventory costs.