Efficiency Optimization As A Function Of The Motor Operating Point - Siemens SINAMICS G220 Operating Instructions Manual

Functions
14.10 Closed-loop drive control
Number
r0333[0...n]
p0341[0...n]
p0342[0...n]
p1226[0...n]
p1400[0...n].0...31
r1407.0...31
r1493
p1496[0...n]
p1498[0...n]
c1502[0...n]
p1560[0...n]
p1561[0...n]
p1562[0...n]
p1755[0...n]
p5310[0...n].0...1
r5311[0...n].0...5
p5312[0...n]
p5313[0...n]
p5314[0...n]
p5315[0...n]
14.10.10

Efficiency optimization as a function of the motor operating point

Overview
The efficiency optimization optimizes the flux 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
Efficiency optimization is deactivated in the converter factory setting (p1401.14 = 0 signal).
The efficiency of an induction motor is determined by speed, torque and flux. The torque and
speed are determined by the driven machine. Efficiency optimization therefore uses the flux
as the variable quantity.
560
Name
Rated motor torque
Motor moment of inertia
Ratio between the total and motor moment of inertia
Threshold for zero speed detection
Speed control configuration
Status word speed controller
Moment of inertia total, scaled
Acceleration precontrol scaling
Load moment of inertia
Freeze moment of inertia estimator
Moment of inertia estimator accelerating torque threshold
value
Moment of inertia estimator change time moment of inertia
Moment of inertia estimator change time load
Motor model changeover speed encoderless operation
Moment of inertia precontrol configuration
Moment of inertia precontrol status word
Moment of inertia precontrol linear positive
Moment of inertia precontrol constant positive
Moment of inertia precontrol linear negative
Moment of inertia precontrol constant negative
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB
Unit
[Nm]
[kgm²]
[rpm]
[kgm²]
[%]
[kgm²]
[%]
[ms]
[ms]
[rpm]
[s²]
[kgm²]
[s²]
[kgm²]
SINAMICS G220 converter