A transformer assembly is formed from a primary winding wound about a toroidal or other annularly shaped magnetic core. A secondary winding passes through a center of the magnetic core and about an exterior of the magnetic core. The transformer assembly is disposed within a sealed enclosure into which fluid is introduced to directly contact the magnetic core before exiting through an outlet, submerging the magnetic core, the primary winding, and the secondary winding in flowing fluid. The primary winding may be disposed within a flexible tubing through which fluid flows, or alternatively, the primary winding may be cooled via contact with the cooling fluid flowing through the sealed enclosure. The secondary winding may be either internally cooled via cooling fluid flowing therethrough, or externally cooled via the cooling fluid flowing through the sealed enclosure. In some embodiments, a separate coil cooling circuit is defined external to the sealed enclosure.
A high current multi-layer parallel plane inductor is formed from a plurality of electrically conductive continuous layers folded back and forth to form a compact series inductor with each one of the plurality of electrically conductive layers having one or more layer pocket holes with layer edge notches forming one or more coil control pockets that generate a magnetic field pattern when alternating current is applied to the inductor.
H01F 17/00 - Inductances fixes du type pour signaux
H01F 41/04 - Appareils ou procédés spécialement adaptés à la fabrication ou à l'assemblage des aimants, des inductances ou des transformateursAppareils ou procédés spécialement adaptés à la fabrication des matériaux caractérisés par leurs propriétés magnétiques pour la fabrication de noyaux, bobines ou aimants pour la fabrication de bobines
A hand-held, water-cooled toroidal autotransformer assembly is formed from longitudinally-oriented electrically conductive radially spaced apart concentric pipes that are physically and electrically configured in series and arranged around a longitudinally-oriented toroidal magnetic core to form the windings of the autotransformer with spaces between the longitudinally-oriented concentric pipes forming a flow path for a cooling fluid within the autotransformer.
A cap sealing electric inductor assembly or electric power transformer assembly is formed by encasing a cap sealing electric inductor or an electric power transformer in a thermally conductive powder with a thermal conductivity greater than 30 W/m•K. A heat exchanger array transfers heat from the thermally conductive powder generated by operation of the cap sealing electric inductor or the electric power transformer to ambient.
H05B 6/10 - Appareils de chauffage par induction, autres que des fours, pour des applications spécifiques
B29C 65/36 - Assemblage d'éléments préformésAppareils à cet effet par chauffage, avec ou sans pressage avec des éléments chauffés qui restent dans le joint, p. ex. un "élément de soudage perdu" chauffés par induction
A process for electric induction heating of large billets to a tapered cross sectional heating profile by inductively scan heating the axial circumference of the large billet with a single induction coil prior to hot working the large billet in an extrusion or forging process is provided.
Discrete workpieces move through a longitudinally-oriented through-gap in an open-box rectangular ferromagnetic material. A transverse magnetic flux is established in the through-gap inductively heats the discrete workpieces moving through longitudinally-oriented through-gap. A longitudinal axis of the workpiece or the planar surface of a planar workpiece is oriented either parallel to, or perpendicular to, transverse magnetic flux to heat treat the workpiece.
Multiple longitudinally oriented continuous workpieces move through separate longitudinally oriented through gaps in an open box rectangular ferromagnetic material that has multiple longitudinally oriented through gaps. A transverse magnetic flux established in each through gap inductively heats the workpiece moving through each through gap. Alternatively a single longitudinally oriented workpiece moving through a single adjustable width longitudinally oriented through gap in an open box rectangular ferromagnetic material is inductively heated by a transverse flux established in the adjustable width longitudinally oriented through gap.
A braze joint is made between two workpieces by first forming a thermal shrink fit region between the two workpieces adjacent to, or around, a braze or filler region in which a filler metal is located adjacent to, or within. The filler metal is suitably heated so that it flows in the braze or filler region to form the braze joint of the two workpieces. Cutouts may be formed in the thermal shrink fit region adjacent to the braze or filler region to extend the braze joint region or provide paths for gas byproducts in the brazing process.
Apparatus and method are provided for an electric induction brazing process in an inert atmosphere using a substantially oxygen free copper alloy filler or preform under an inert atmosphere within a brazing chamber minimally sized for containment of the brazed joint region and an induction coil. The inert atmosphere may be nitrogen gas supplied from a liquid nitrogen source. For brazing of an open interior fitting around a hole in a tubular material a nesting area is provided around the hole for seating of the filler or preform and the fitting.
brevets
