ID 442426.04 332WE KEEP THINGS MOVING
Optimize
15
Manual SD6
Activate the encoderless SVLC-HP control mode for AC motors with B20 =
3:SLVC-HP.
Areas of application for the SLVC-HP are drives with
• high accelerations,
• changing loads and
• large loads when the motor starts up.
The parameters B46, B47 and B48 are optimized during commissioning of the
SLVC-HP control mode. You can perform this automatically with the action
Optimize B45 SLVC-HP (s. section 10.2.3.4 B45 action autotune SLVC).
If action B45 can not be performed, note the following description for a manual
setting.
The quality of control of the SLVC-HP control mode also depends on how exact
the values B52 stator inductance, B53 stator resistance and B54 leakage factor
are. For external motors, you can use the action B41 to optimize these
parameters (s. section 10.2.3.3 B41 Autotuning).
Set B48 Integral Gain SLVC-HP
This parameter affects the dynamic properties of the motor. The larger B48 is,
the faster the motor model can follow the actual speed.
The correct setting can be checked by means of the speed curve. If an encoder
is present during commissioning, E15 n-motor encoder should be considered,
otherwise E91.
If the motor can not follow the set speed ramp despite sufficiently large torque
limits, B48 must be increased. Values that are too large lead to the fault
56:Overspeed.
Set B47 Proportional Gain SLVC-HP
This parameter affects the dynamic properties of the motor (especially the
stability and overshoot behavior of the speed).
The correct setting can be checked by means of the speed curve. If an encoder
is present during commissioning, E15 should be considered as the actual
speed, otherwise E91. B47 should not be smaller than 1 % of B48. The drive
can become unstable for values that are too small. The resulting vibration
oscillates at the mechanical frequency. By increasing B47, overshoots in the
speed can be dampened. Values that are too large lead to vibrations in the
current and speed.
E07 n-post-ramp
E91 n-motor E15 n-motor-encoder B48 or ( too small)
E91 n-motor E15 n-motor-encoder B48 or ( too large)
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