Number Name Unit
r0333[0...n] Rated motor torque [Nm]
p0341[0...n] Motor moment of inertia [kgm²]
p0342[0...n] Ratio between the total and motor moment of inertia
p1226[0...n] Threshold for zero speed detection [rpm]
p1400[0...n].0...31 Speed control conguration
r1407.0...31 Status word speed controller
r1493 Moment of inertia total, scaled [kgm²]
p1496[0...n] Acceleration precontrol scaling [%]
p1498[0...n] Load moment of inertia [kgm²]
c1502[0...n] Freeze moment of inertia estimator
p1560[0...n] Moment of inertia estimator accelerating torque threshold
value
[%]
p1561[0...n] Moment of inertia estimator change time moment of inertia [ms]
p1562[0...n] Moment of inertia estimator change time load [ms]
p1755[0...n] Motor model changeover speed encoderless operation [rpm]
p5310[0...n].0...1 Moment of inertia precontrol conguration
r5311[0...n].0...5 Moment of inertia precontrol status word
p5312[0...n] Moment of inertia precontrol linear positive [s²]
p5313[0...n] Moment of inertia precontrol constant positive [kgm²]
p5314[0...n] Moment of inertia precontrol linear negative [s²]
p5315[0...n] Moment of inertia precontrol constant negative [kgm²]
14.10.10 Eciency optimization as a function of the motor operating point
Overview
The eciency optimization optimizes the ux of the motor depending on the operating point of
the motor. This has the following advantages:
• Lower energy costs
• Lower motor temperature rise
• Lower motor noise levels
Requirement
The converter operates an induction motor.
The speed control is active.
Description of function
Eciency optimization is deactivated in the converter factory setting (p1401.14 = 0 signal).
The eciency of an induction motor is determined by speed, torque and ux. The torque and
speed are determined by the driven machine. Eciency optimization therefore uses the ux
as the variable quantity.
Functions
14.10Closed-loop drive control
SINAMICS G220 converter
560 Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB
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