Siemens 1FT7 Configuration Manual page 243

Optimum operating point
Operating point at which the maximum continuous output of the motor is normally provided
at high efficiency (see figure below).
Figure A-1
Optimum power P
opt
Power achieved at the optimum speed.
The rated speed is the optimum speed (see optimum speed), the optimum power
corresponds to the rated power.
Optimum speed n
opt
Speed at which the optimum motor power is output.
If the rated speed is less than the optimum speed, the rated speed is output.
Rated converter current I
RMS converter output current (per phase) that can be supplied on a continuing basis by the
recommended motor module The recommended motor module is selected such that I
greater than the stall current I
1FT7 Synchronous Motors
Configuration Manual, (PFT7S) 01/2009, 6SN1197-0AD13-0BP2
Optimum operating point
N conv
0 (100K)
.
Appendix
A.1 Description of terms
is
N conv
243