Siemens SIMOTICS T-1FW3 - Description of terms

1FW3 complete torque motors
Configuration Manual, 08/2020, A5E46027705B AA
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Appendix
A
A.1 Description of terms
Rated torque M
N
Thermally permissible continuous torque in S1 duty at the rated motor speed.
Rated speed n
N
The characteristic speed range for the motor is defined in the speed-torque diagram by the
rated speed.
Rated current I
N
RMS motor phase current for generating the particular rated torque. Specification of the
RMS value of a sinusoidal current.
Braking torque M
br rms
M
br rms
corresponds to the average braking torque for armature short-circuit braking that is
achieved through the upstream braking resistor R
opt
.
Braking resistance R
opt
R
opt
corresponds to the optimum resistance value per phase that is switched in series
external to the motor winding for the armature short-circuit braking function.
DE
Drive end
Cyclic inductance L
D
The cyclic inductance is the sum of the air gap inductance and leakage inductance relative to
the single-strand equivalent circuit diagram. It consists of the self-inductance of a phase and
the coupled inductance to other phases.