Patent application number | Description | Published |
20090127857 | ELECTRICAL INDUCTOR ASSEMBLY - 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. | 05-21-2009 |
20090128276 | LIGHT WEIGHT REWORKABLE INDUCTOR - An electrical inductor has at least one wire wound core. When the wire wound core is placed within the shell at least one cavity is present. This cavity is filled with a powder to provide the inductor with better thermal and electrical properties. | 05-21-2009 |
20090146769 | Light-weight, conduction-cooled inductor - A lightweight inductor for the motor controller of an aircraft starter includes a toroidal inductor core divided into multiple sections that are separated by a thermally conductive, but electrically insulating, material. The inductor core is wound with wire and positioned inside of an electrically and thermally conductive container, which acts as a heat sink and EMI shield, while also reducing eddy currents within the inductor core. | 06-11-2009 |
20100008112 | INTERPHASE TRANSFORMER - Three single-phase interphase transformers are connected to a three-phase transformer. The three single-phase interphase transformers each contain a component for efficiently dissipating heat. | 01-14-2010 |
20100019862 | Lightweight Electromagnetic Interference Filter - 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. | 01-28-2010 |
20100091422 | LIGHTNING STRIKE MIGITATION FOR AIRCRAFT - A lightning mitigation system for use on an aircraft employs parasitic capacitance associated with a motor/generator to dissipate voltage provided as a result of a lightning strike. The motor/generator includes a set of windings defined by an outer periphery and a case that surrounds the set of windings. A parasitic capacitance is defined by the airgap separating the windings of the motor/generator from the case. A motor controller is electrically connected to the set of windings and includes a filter circuit. The filter circuit includes an equivalent capacitance that is selected based on the parasitic capacitance associated with the motor/generator such that a lightning strike results in a large portion of the voltage being dissipated by the parasitic capacitance of the motor/generator. | 04-15-2010 |
20110235376 | MULTI-LEVEL PARALLEL PHASE CONVERTER - A multi-level parallel phase power converter has a power source, a converter, and an electrical node. The converter includes multiple converter modules. Each of the converter modules has multiple multi-level power converters, a poly-phase interphase inductor, and a set of poly-phase power summing connections. The summed power of each of the multiple converter modules are connected together to form a single poly-phase power converter. | 09-29-2011 |
20120234520 | TRANSFORMER ASSEMBLY WITH ENHANCED AIR COOLING - A cooling system for a transformer comprises a fan duct and a housing which together enclose an interior space. A transformer located in the interior space is mounted on the fan duct, and has a plurality of core sections surrounded by windings and separated by gaps. An air channeling structure is located between the transformer and the fan duct. A cooling airflow path extends through the air channeling structure, and between core sections of the transformer. | 09-20-2012 |
20120250376 | SOFT STARTER FOR PHASE-SHIFTING AUTOTRANSFORMER AC-DC POWER CONVERTER - An AC-DC power converter has a phase-shifting autotransformer based rectifiers and DC capacitors. Soft start of the AC-DC power converter is achieved by designing the autotransformer to operate at a low peak flux density at a point of AC voltage step application (initial turn on). The addition of a controlled impedance segregates capacitor charging from the initial magnetizing process of the autotransformer. | 10-04-2012 |
20130083574 | DUAL-INPUT NINE-PHASE AUTOTRANSFORMER FOR ELECTRIC AIRCRAFT AC-DC CONVERTER - 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. | 04-04-2013 |
20130181643 | POWER CONVERTER WITH ASYMMETRIC PHASE SHIFT AUTOTRANSFORMER FOR ALTERNATING CURRENT (AC) MOTOR - An AC-AC power converter supplies AC power to an AC motor having a plurality of motor windings and a case connected to a ground. The AC-AC power converter architecture includes an asymmetric phase shift autotransformer/rectifier unit (ATRU) that converts an AC input to a DC output, wherein the asymmetric phase shift ATRU generates a common-mode AC voltage across the asymmetric phase shift ATRU. The common mode voltage is diverted to ground through motor case parasitic capacitance via a common-mode voltage pull-down circuit connected between each phase of the ATRU AC input and the ground. | 07-18-2013 |
20130187738 | ELECTRICAL APPARATUS HAVING A THERMALLY CONDUCTIVE BOBBIN - 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. | 07-25-2013 |
20130272040 | DUAL-INPUT 18-PULSE AUTOTRANSFORMER RECTIFIER UNIT FOR AN AIRCRAFT AC-DC CONVERTER - 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. | 10-17-2013 |