CORES OF MAGNETIC CIRCUITS

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Cores of magnetic circuits make a very important part for transformers production and their quality is crucial for the final parameters of magnetic circuit.

A transformer core consists of magnetic circuit where its induction flux caused by the current passage flowing through the primary coiling induces electric voltage in the secondary coiling.

Wound transformer cores are used as compact cores (toroids) or as cores with air-gaps. ArcelorMittal Technotron s.r.o. produces cores from grain oriented transformer metal band with silicium alloyed Goss texture of about 3 %, thickness range form 0.15 to 0.35 mm.

General specification used paterial for processing according IEC 60404-1;2000

 

We offer this type of transformer cores:

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- TOROIDAL CORES
- CUT C CORES
- CRUCIFORM CORES
- UNICORE CORES

 

APPLICATION POSSIBILITIES OF TOROIDAL CORES

Transmission transformers
Instrument transformers
Measurement transformers
Voltage transformers
Current transformers
Supply transformers
Power transformers

Production process of magnetic cores

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MAGNETIC PROPERTIES OF TRANSFORMER CORES

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Magnetic properties of transformer cores are directly depended on band quality and thickness used for production. The cores are tested individually and every core which is leaving the production is measured for provide the 100% quality of each delivery.

Measuring process is operated and scanned by technological computer. This computer evaluates following values:

▪ effective value non-sinusoidal actuating current	Tµ[A]
▪ intensity of magnetic field	Hef[A/m]
▪ magnetic induction	Bmax[T]
▪ apparent power	S[VA]
▪ active input (losses)	P[W]
▪ amplitude permeability	µ

These values are measured fluently in whole range of alternating magnetizing characteristic just limited to maximum power exciter circuit of measuring instrument.

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Last update: 1.11.2008