Abstract

The invention relates to an electronic unit, comprising a carrier with at least one electronic circuit, from which carrier protrude a number of terminals which are connected internally to the or each circuit. The carrier carries at least one transformer, which transformer converts a supply voltage, in particular a mains voltage of for instance 230 V AC, to a lower voltage, for instance 1 V AC, and the carrier also carries rectifier means which convert the down-transformed voltage to at least one direct voltage necessary for the functioning of the or each circuit.

IPC Classes  ?

• H01F 17/00 - Fixed inductances of the signal type
• H01F 27/02 - Casings
• H01F 27/255 - Magnetic cores made from particles
• H01F 27/28 - CoilsWindingsConductive connections
• H01F 38/02 - Adaptations of transformers or inductances for specific applications or functions for non-linear operation

Abstract

The invention relates to an electrical device comprising a stack of electrical elements, wherein: a central axis is defined in the stack; each element comprises an electrically insulating carrier; the carrier carries an electrically conductive loop-shaped track; both end zones of the track are located in the edge zone of the carrier; the loop-shaped tracks each form a turn and are arranged around the central axis in the stack; the end zones are connected to each other in electrically conductive manner such that the turns form one winding in at least groupwise manner; the carriers are congruent and each have a form such that they can be rotated from a starting position through an angle a around the central axis to a rotated position in which they take up the same space as in the starting position; adjacent elements with tracks which together form a winding are disposed rotated through an angle α relative to each other, and the mutually registered end zones are mutually connected by an electrical conductor extending transversely of the elements; the free end zones of the tracks of the outermost elements of the stack of elements form the externally accessible terminals of the or each winding; the elements are connected non-releasably to each other, and the stack has a peripheral surface with a form which is prismatic at least in its central zone, i.e. has the same cross-sectional form at any axial position.

IPC Classes  ?

• H01F 17/00 - Fixed inductances of the signal type
• H01F 27/02 - Casings
• H01F 27/255 - Magnetic cores made from particles
• H01F 27/28 - CoilsWindingsConductive connections
• H01F 38/02 - Adaptations of transformers or inductances for specific applications or functions for non-linear operation
• H01F 27/08 - CoolingVentilating

Abstract

The invention relates to a method for manufacturing an electrical device comprising a stack of electrical elements, each with an electrically insulating carrier and an electrically conductive loop-shaped track with edge end zones; the end zones are connected conductively to each other; adjacent elements are disposed rotated relative to each other and their end zones are mutually connected by longitudinal conductors; which method comprises the following steps of: (a) providing the electrical elements, each comprising a carrier which can withstand a temperature T4, and the loop-shaped track, the material of which has a melting temperature Tl and which carrier can withstand a temperature T4; (b) providing the end zones with soldering material with a melting temperature T2; (c) stacking the elements such that adjacent elements are rotated through the angle a; (d) arranging a longitudinal recess in the outer surface at each angular position of the stack at the position of an end zone of a track of an element; (e) providing electrically conductive wires with a melting temperature T3; (f) providing the wires with soldering material; (g) positioning the wires in the recesses; (h) heating the stack to a temperature T5, wherein: T5 > T2 T5 < T4 T5 < T1 T5 < T3; (i) fusing and curing the carriers in step (h); (j) soldering the wires to each other at the end zones of the tracks in step (h); (k) cooling the thus formed device.

IPC Classes  ?

• H01F 17/00 - Fixed inductances of the signal type
• H01F 27/02 - Casings
• H01F 27/255 - Magnetic cores made from particles
• H01F 27/28 - CoilsWindingsConductive connections
• H01F 38/02 - Adaptations of transformers or inductances for specific applications or functions for non-linear operation
• H01F 41/04 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets for manufacturing coils
• H01F 27/30 - Fastening or clamping coils, windings, or parts thereof togetherFastening or mounting coils or windings on core, casing, or other support