21
T32FNA
6
Load limits
The nominal torques may be exceeded statically by max. 50 %. Within the
nominal torque exceeded, no additional irregular loads such as longitudinal
and transverse forces and bending moments are permissible. The limit values
are specified in the chapter ”8. Technical Data”.
Measurement of static and dynamic torque
Torque transducers T32 FNA are suitable for the measurement of static and
dynamic torques. When dynamic torque is measured one should note the fol-
lowing:
-
The static calibration of the T32 FNA is also valid for dynamic torque mea-
surements.
Note: The frequency of dynamic torque must not exceed the natural fre-
quency of the mechanical measuring installation.
-
The natural frequency f
o
of the mechanical measuring installation depends
on the moments of inertia J
1
and J
2
of the coupled rotating masses and de-
pends on the torsional stiffness c
T
of the T32 FNA.
The natural frequency of the arrangement can be calculated with the following
equation:
f
0
1
2
¶
·
c
T
·
Æ
1
J
1
1
J
2
É
¯
f
0
=
natural frequency of the
measurement arrangement (Hz)
J
1,
J
2
=
mass moment of inertia of
the connected rotating masses (kgm
2
)
c
T
=
torsional stiffness of the torque
transducer (Nm/rad)
SUNSTAR传感与控制 http://www.sensor-ic.com/ TEL:0755-83376549 FAX:0755-83376182 E-MAIL:[email protected]
SUNSTAR自动化 http://www.sensor-ic.com/ TEL: 0755-83376489 FAX:0755-83376182 E-MAIL:[email protected]