Vacuumschmelze Gmbh & Company Kg

Vacuumschmelze Gmbh

Joerg Petzold

Detlef Otte

Wulf Guenther

Giselher Herzer

Markus Brunner

Johannes Beichler

Johannes Binkofski

Hans-Reiner Hilzinger

Dirk Heumann

Diemtar Graetzer

A magnet core () that is suitable for use in a fault current circuit breaker and that is made of a helically wound, magnetically soft band has a top () and a bottom (), the top () and the bottom () being formed by side surfaces () of the magnetically soft band. The magnet core () is fixed in a protective housing (), and there is a contact cement () between the bottom () of the magnet core () and an inside wall () of the housing for fixing the magnet core ().

Magnet core; method for its production and residual current device

A current transformer core has a ratio of the core outside diameter Dto the core inside diameter Dof &#x3c;1.5, a saturation magnetostriction &#x3bb;of =|4| ppm, a circular hysteresis loop with 0.50=Br/Bs=0.85 and an H=20 mA/cm. The current transformer core is made of a soft magnetic iron alloy in which at least 50% of the alloy structure is occupied by fine-crystalline particles with an average particle size of 100 nm or less, and the iron-based alloy comprises, in essence, one combination.

Current transformer cores formed from magnetic iron-based alloy including final crystalline particles and method for producing same

Current transformer core and method for producing a current transformer core

The invention relates to a high-pass branch () of a frequency separating filter for ADSL systems comprising inductive components () which dispose of magnet cores made of a soft magnetic amorphous or nanocrystalline. As a result, frequency separating filters are provided which comprise small structural shapes and which have especially beneficial properties in the relevant frequency and temperature range.

High-pass branch of a frequency separating filter for ADSL systems

Current transformer with direct current tolerance

In an ISDN digital communications system, the transmission between the network termination and the terminal equipment ensues via what is referred to as the S.sub.o interface, on the basis of interface transformers. Since the power supply of the terminal equipment likewise partly ensues via these transformers, a current asymmetry in the lines results in a pre-magnetization of the transformers. Thus, the ISDN demands made of the transformers must also be satisfied given a DC pre-magnetization. Compact transformers having a simple winding format that satisfy the ISDN demands are set forth, the transformers utilizing a magnetic core having a fine-crystalline iron-based alloy with an iron part of more than 60 atomic %, the structure thereof being more than 50% fine-crystalline grains having a grain size of less than 100 nm and having a remanence ratio of less than 0.2 and a permeability in the range from 20,000 to 50,000, and an inductance of less than 100 pF.

Fine-crystalline iron-based alloy core for an interface transformer

Growing community of inventors

Kahl, Germany

Joerg Petzold