C5: Automatic Speed Regulator (Asr) - YASKAWA FSDrive-MV1000 Parameter Manual

◆ C5: Automatic Speed Regulator (ASR)

The ASR is used for controlling the motor speed in CLV control mode. It adjusts the torque reference (CLV) in order to
minimize the differencebetween frequency reference and actual motor
Figure 2.26
Detected speed
■ Adjusting the ASR Parameters
Before adjusting ASR parameters make sure all motor data have been set up correctly or Auto-Tuning has been
performed.
Analog output signals should be used to monitor the frequency reference after softstarter (U1-16) and the motor speed
(U1-05) when adjusting the ASR. Refer to
functions.
Generally when tuning the ASR, first optimize the ASR gain, then adjust the integral time settings. Always make
adjustments with the load connected to the motor.
Adjusting the ASR Parameters in CLV
In CLV, the drive is pre-set to use ASR settings C5-01/02 over the whole speed range. If required by the application, a
second set of ASR parameters (C5-03/04) can be automatically activated depending on the motor speed or by using a
contact input. Also refer to
page 132.
Perform the following steps for adjusting ASR parameters:
1.
Run the motor at zero speed and increase the ASR gain (C5-01) as much as possible without oscillation.
2.
Run the motor at zero speed and decrease the ASR integral time (C5-02) as much as possible without
oscillation.
3.
Run at the normal operating speed. Check for over/undershoot when changing speed and for any oscillation.
4.
Should problems occur in step 3, increase the integral time and reduce the gain.
Alternatively, use different ASR settings for high and low speed. Set the values from step 1 and 2 to parameters
C5-03 and C5-04, then set an ASR switching frequency in parameter C5-07. Run the motor at a speed higher
than C5-07 and repeat step 3 while adjusting C5-01 and C5-02.
YASKAWA ELECTRIC EZZ010930 FSDrive-MV1000 Parameter Guide
C5-01, C5-03
+
Frequency
P
reference
-
C5-02, C5-04
Figure 2.26 Speed Control Block Diagram for CLV
H4: Analog Outputs on page 193
C5-01, C5-03 / C5-02, C5-04: ASR Proportional Gain 1, 2 / ASR Integral Time 1, 2 on
speed.Figure 2.26
+
Primary
filter
+
I
I
C5-06
limit
C5-08
illustrates how ASR works.
Torque limits
Torque reference
L7-01 to L7-04
common_TMonly
for details on setting up analog output
2.3 C: Tuning
131