Operation principle
To determine the exact height of electrical steel
packages for electrical motors and transformer cores in relation
to the installation size and the motor performance the “filling
factor” is an important dimension.
If a manufacturer of electric motors and transformers constructs
a motor or transformer, then he knows how high it is. The height
is determined basically by the height of the stator core. This,
in turn, then determines the performance of the motor. Since the
stator core is made from coated electrical steel, the thickness
of the steel (filling factor) ultimately determines the performance
of the motor and consequently the height of the electric motor.
The procedure for using the stacking factor tester is as follows:
After the samples of electrical steel have been measured and weighed
they are stacked to a minimum height of 6 mm and fixed between
the jowls of the press. Samples are pressed and after a pressure
of 1 (+/- 0,05) N/mm3 has been attained, the actual measuring
process begins. The distance between the jowls of the press is
measured and in this way the stacking factor is calculated. Together
with the corresponding measuring parameters the measuring result
is recorded. So at any time reproducibility of the test is possible.
Measurements with the stacking factor tester are
carried out in accordance with IE C 60404-13.
