Planar transformers for energy transfer

Abstract

The invention relates to a planar transformer (100) for energy transfer, having a circuit board of the sandwich type with at least three layers for constructing a circuit of electrical conductors, wherein the first layer (L1 ) and the second layer (L2) constitute the outer layer of the circuit board, and each other layer of these layers constitutes an inner layer of the circuit board, and wherein an insulating material having a minimum thickness is respectively arranged between all these layers ; a plurality of circuits (1, 2, 3) each galvanically isolated from each other, wherein the first circuit (1) forms a primary circuit and each other circuit (2, 3) forms an equal secondary circuit; the magnetic core (5 ) consisting of two interconnected, magnetic core pieces (5a, 5b), wherein the first core piece (5a) is formed together with the middle part (5m) and the two outer arms (5s1, 5s2) A U-shape, and wherein the circuit board has two voids (7a, 7b), and the two outer arms of the first magnetic core piece fit into these two voids and meet the second magnetic core at its end away from the middle part. The cores are connected, wherein a conductor circuit formed on at least one outer layer is used for exactly one circuit (1) of at least three circuits (1, 2, 3), and wherein at least three circuits (1, 2 , 3) the conductor circuit of at least one loop (2) is wound around the first outer arm, the conductor circuit of at least two other loops (1, 3) of the at least three loops (1, 2, 3) is wound around the second outer arm Arm wrapped around.

Description

technical field [0001] The invention relates to a planar transformer for energy transfer. Background technique [0002] Transformers are generally used according to various standards for the galvanic isolation of circuits, wherein, depending on the design of the transformer, energy, signals and / or data can be transferred via this transformer. [0003] Planar transformers, i.e. transformers characterized by a planar construction due to their special form of construction, are used especially in isolating amplifiers for energy transfer, where the isolating amplifier is able to provide galvanic isolation for several circuits and / or also connect Different AC voltage levels. [0004] attached by Figure 15 An extremely simplified block diagram regarding the use of a transformer inside an isolating amplifier for galvanic isolation between one primary loop and at least one secondary loop in the signal processing of analog signals can be seen in . [0005] Accordingly, during opera...

AI Technical Summary

Problems solved by technology

Possible disadvantages of the resulting lower coupling or higher leakage inductance can usually be compensated with circuit technology

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