Lenze i950 Series, Manual

Page: 229 / 500

Adapt pole position identification PLI (360°)
RFR
IMP
t [s]
❶
❷
❸
❹
① ② ③
0
1
Fig. 66: Chronological sequence of the pole position identification
In case of drives with a high static friction, mass inertia or alternating load, an optimisation
may be necessary:
•
The amplitude of the current vector must be set so high that the motor with a high mass
inertia can be accelerated.
•
The cyclic continued rotation of the current vector by 22.5° has to cause an equivalent
angular rotation of the motor shaft (rotor). A step function has to be achieved. Here,
actual positions with very low overshoots are visible.
NOTICE
Thermal overload of the motor!
The motor may be permanently damaged.
▶
If no temperature monitoring is available in the motor, and/or the I²xt motor monitoring
and the maximum current monitoring are not parameterised correctly, the motor can be
permanently damaged if the current amplitude is set too high!
▶
Motor overload monitoring (i²*t)
▶
Overcurrent monitoring
Overview of more objects available for
•
Identification
•
Triggering
•
Diagnostics
Tip!
An oscilloscope serves to execute the optimisation
Configuring the feedback system
Synchronous motor: Pole position identification (PPI)
Pole position identification (PPI) 360°
229