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Femag

Cores “C” series

The skyrocketing cost of electromechanical work, due to its high labour contenti, has led to the introduction of “C” type cores, known in Great Britain as “C type Wound Cores” and in Germany as “Schnittbandkerne”. The wound cores are made of grain oriented steel strips, affording minimum specific losses in the direction of grain orientation (for certain types, the loss is lower than 1W/kg at 1.5 Tesla) and very good initial and high-induction permeability values.

Thanks to these features, it is possible to manufacture high efficiency equipment requiring a minimum amount of material and minimum assembly times and, therefore, reduced costs. The “C” core is impregnated with a special epoxy resin: it is compact and rigid and thus scarcely affected by mechanical vibrations, although operating at high magnetic induction (up to 1.7 Tesla) and at maximum temperatures of 140° C.

Table of quality

Cut Specification Thickness Frequency Induction Max. Losses Max Magnetising Power VA/kg for Lm:
corrispondente a Lm di:
  n mm Hz Gauss W/kg 2,5 cm 5 cm 10 cm 20 cm 40 cm 80 cm
A OS-110 0,30 50 15.000 1,7 - - 15 10 7 5,5
C OS-111 0,30 50 15.000 1,7 - - 6,1 5,2 4,8 4,5
A OS-110 0,30 50 17.000 2,0 - - 17,5 12,8 10,9 9,5
C OS-111 0,30 50 17.000 1,8 - - 10,2 8 6,5 6
B OS-210 0,30 50 17.000 2,2 - - 23 19 16,8 15,1
  Max. Field Referred to Lm (Aeff/cm)
      10 cm 20 cm 40 cm  
A OS-120 0,30 50 19.000 4     - 8 6  

Tolerances table

B
mm		 A
mm		 D
mm		 E
mm
+ 2,4
- 0		 + 2
- 0		 + 0,8
- 0		 + 1
- 0
AD32 +3 ,5
- 0		 + 3
- 0		 + 1
- 0		 + 1
- 0
AD51 +3,5
- 0		 + 3
- 0		 + 1
- 0		 + 1
- 0
AJ32 + 3,5
- 0		 + 3
- 0		 + 1
- 0		 + 1
- 0
AP51 + 3,5
- 0		 + 3
- 0		 + 1
- 0		 + 1
- 0

Standard Cores Series

HWR series thickness 0,30 mm
f = 50 Hz; Bmax = 1,7 Tesla
Specification  OS-110, Cut “A”

Data table Cores performance curves
ELECTRICAL TEST STAND

Equipment for testing magnetic characteristics of “C” and toroidal cores from 50Hz up to 5Khz.

SU Cores Series

Cores thickness 0,30 mm
f = 50 Hz; Bmax = 1,7 Tesla
Specification OS-110, Taglio “A”

Data table Cores performance curves

SE Cores Series

Cores thickness 0,30 mm A.S.G.O.
f = 50 Hz; Bmax = 1,7 Tesla
Specification OS-110, Taglio “A”

Data table Cores performance curves

SM Cores Series

Cores thickness 0,30 mm A.S.G.O.
f = 50 Hz; Bmax = 1,7 Tesla
Specification OS-110, Taglio “A”

Data table Cores performance curves

BF Cores Series

Cores thickness 0,30 mm A.S.G.O.
f = 50 Hz; Bmax = 1,7 Tesla

Data table Cores performance curves

“C” Cores from stamp laminations design

Cores thickness 0,30 mm A.S.G.O
f = 50 Hz; Bmax = 1,7 Tesla

Date table Cores performance curves

Special shapes of rectangular “C” Cores

Our production facilities allow the manufacture of
“C” cores, covering a wide dimensional range.
Rectangular cores (outside standard type) are available with maximum dimension of approx. 550 mm (measured diagonally).
We are equipped with a machine tools for a number of special shapes (please enquire) so that this category of order can often be handled without any additional tooling.
The cores are usually cut in a ratio 1:1
On request asymmetrics separation can be made.

LARGE CORE CUTTING LINE

Contact us for a free quote or more information

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