B-H ANALYZER SY-8218
/ SY-8219
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4.6 Connection of sample
●
A sample is connected to the measurement POD as follows:
■
2-coil method
①
Connect the start of the primary turns to P2 terminal
and the end to P1 terminal.
②
Connect the start of the secondary turns to S2
terminal and the end to S1 terminal.
Fig.4-8 2-coil method
■
1-coil method
If the secondary turns cannot be applied, measurement
uses 1-coil method. In this case, Core loss Pc
includes the copper loss of the primary turns, therefore
Pcv, Pcm, and
θ
include its influence. In addition,
make sure to select 1-coil method in Configuration
for measurement.
(For settings, see “5.4 Measuring Method”.)
①
Connect the start of turns to P2 terminal and
the end to P1 terminal.
②
Short-circuit P2 and S2 terminals.
③
Short-circuit P1 and S1 terminals.
Fig.4-9 1-coil method
It is recmmended that Fixed Parameter by 1-coil method is set in I1m and Hm specification.
Because the secondary turns is not given as for 1-coil method, induced voltage V
2
(t) in the basic measurement principle chart of Fig.2-2 will
directly measure the voltage between the primary turns. In this case, it differs from 2-coil method, and
voltage drop in shunt resistance R
S
by
exciting current i
1
(t) and equivalent series resistance R
L
of sample will be superimposed to V
2
(t).
Therefore, the measurement might not go well because of the superimposition when I1m or Hm is specified for the target parameter.
Especially, voltage drop in shunt resistance R
S
and equivalent series resistance R
L
grows when exciting current i
1
(t) grows, and, in addition,
the measurement doesn't go well.
P1
P2
S2 S1
Start of
primary turns
Start of
secondary turns
P1
P2
S2
S1
Start of
turns