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    Cores of magnetic circuits

    make a very important part for transformers production... Cores of magnetic circuits
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    Toroidal Cores

    Toroidal core is basically wounded grain oriented silicon strip containing approximately 3% of silicium to the circle or other form.. Toroidal Cores
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    Cut C Cores

    Wound transformer cores are manufactured in process of winding up the transformer strip on a mandrel followed by the processes.. Cut C Cores
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    Unicore cores

    UNICORE constitute a new line of cores of magnetic circuits. Unicore cores

CUT C CORES

Wound transformer cores are manufactured in process of winding up the transformer strip on a mandrel followed by the processes of cutting the hot-manufactured and synthetic resin-bond core. Wound cores shape is better adapted for course of the magnetic induction current and the structure of material grain is used more effectively when compared with cores composed of sheet stampings of various shapes.

Cut cores are assembled with a certain air-gap between the pieces, insulation pieces are placed in these gaps during the assembly of the bobbins. Cut surfaces of these cores can be round, oval and rectangular.

BENEFITS OF CUT C CORES

▪ Electrical energy saving thanks to low specific iron watt losses
▪ Saving in quantity of used copper for winding thanks to smaller dimensions and weight of cut cores
▪ Saving in work costs exert for transformers assembly thanks to easy assembly
▪ Low humming

Guaranteed magnetic values of wound cores at frequency of 50 Hz

According to the ArcelorMittal Technotron s.r.o. internal norm

Core Type*Max. specific losses
p1,5/50
[W/kg]
Max. magnetic field
density Heff
at B 1,5T [A/m]
C 08001 - 100002,5400
C 10001 - 260032,2350
C 26004 - 900052,2300

*manufactured from M165-35S

Cut surface quality „A“ - according to the DIN/IEC norms

Core Type* Max. specific losses
p1,7/50
[W/kg]
Max. magnetic field
density Heff
at 1,7T[A/m]
SG = Q2,2265
SU = U2,2265
SE = R2,2265
SM = M2,2265

*manufactured from M150-30S/M140-27S

cut surface quality „C“ - according to the DIN/IEC norms

Core Type* Max. specific losses
p1,7/50
[W/kg]
Max. magnetic field
density Heff
at 1,7T[A/m]
SG = Q1,9125
SU = U1,9125
SE = R1,9125
SM = M1,9125

*manufactured from M150-30S/M140-27S

Marking of cores with air gaps

A core consists of two horse shoe – shaped parts. In order to secure their correct assemblage both parts are marked by a coloured position mark on their front side. The colour of the position mark also determinates the band thickness used for coiling of the core. The core is also marked by a serial number.

YELLOWband thickness 0,35 mm
REDband thickness 0,30 mm
WHITEband thickness 0,27 mm
GREENband thickness 0,15 mm

 

CUT C CORES SINGLE-PHASE

Application possibilities of cut C cores single-phase

▪ chokes
▪ combined instrument transformers
▪ specially designed transformers

Drawing

Type line of supplied cut C cores single-phase

▪ According to the DIN 41309 norm - SG, SU, SE, SM*
▪ According to the IEC 329 norm - Q, R, M, U*
▪ According to the ArcelorMittal Technotron s.r.o. internal norm - C*

Photo

 

CUT C CORES THREE-PHASE

Drawing

 

Application possibilities of cut C cores three-phase

▪ instrument transformers
▪ voltage transformers
▪ inductors
▪ transducers
▪ suppression technology
▪ pulse transformers
▪ chokes
▪ special transformers

Type line of supplied cut C cores three-phase

▪ According to the DIN 41309 norm - S3U
▪ According to the IEC 329 norm - 3U

Photo

 

STEPPED CROSS-SECTION CORES

Drawing

 

Shape of stepped cross-section cores allows better flow of magnetic flux density and their special grain structure is used more effectively as compared with cores composed of metal sheet stampings of various shapes. Specific intersection of these cores allows varied use of circular coils.

As a result of considerable variety of demands on construction we do not provide any standardized assortment. Stepped cross-section cores are manufactured with two or three steps according to customer’s specification.

BENEFITS OF STEPPED CROSS-SECTION CORES

▪ Electrical energy saving thanks to low specific iron watt losses
▪ Saving in quantity of used copper for winding thanks to smaller dimensions and weight of cut cores
▪ Saving in work costs exert for transformers assembly thanks to easy assembly
▪ Low humming
▪ Better use of coils scope due to stepped cross-section
▪ Easier winding of wire on a circular coil

Photo

 

Guaranteed electric magnetic properties of stepped cross-section cores with air gaps

Standard guaranteed highest permissible values of nominal losses and magnetic field intensity at the magnetic induction of Bmax = 1,5 ; 1,7 T and frequency of 50 Hz as divided into four groups:

Material Nominal losses max.
[W/kg]
Magnetic field intensity
max. Heff
at B max 1,7 T [A/m]
P 1,5 P 1,7
M165-35S2,02,5350
M150-30S1,92,3300
M140-27S1,82,2300
0,15*1,62,2400

* at 400Hz/1T corresponding nominal losses 8 – 8.5 W/kg

 

BEFORE SHIPMENT ALL CORES ARE RE-MEASURED, WE PROVIDE THE ELECTROMAGNETIC VALUES ATTEST UPON CUSTOMER’S REQUEST.