YASKAWA GA800

3.5 Auto-Tuning
594 YASKAWA TOEPYAIGA8002B GA800 Drive Programming
Mode T3-00
Application Conditions and
Benefits
Applicable Control Method (A1-02 Value)
V/f
(0)
CL-V/f
(1)
OLV
(2)
CLV
(3)
AOLV
(4)
OLV/PM
(5)
AOLV/
PM
(6)
CLV/PM
(7)
EZOLV
(8)
Deceleration
Rate Tuning
2
To automatically adjust the deceleration
rate to prevent an ov [Overvoltage]
fault.
x x x x x x x x x
KEB Tuning 3
• To automatically adjust parameter
settings to prevent an ov
[Overvoltage] fault with the KEB
Ride-Thru function.
• When L3-11 = 1 [Overvoltage
Suppression Select = Enabled].
x x x x x x x x x
Table 3.12 Input Data for Control Tuning
Input Data Parameters Unit
Auto-Tuning Mode
(T3-00 Value)
Inertia Tuning
(0)
ASR (Speed
Regulator)
(1)
Dec Rate Tuning
(2)
KEB Tuning
(3)
Test Signal Frequency T3-01 Hz x x - -
Test Signal Amplitude T3-02 Rad x x - -
Motor Inertia T3-03 Kg∙m
2
x x - -
System Response Frequency T3-04 Hz - x - -
■ Inertia Tuning
Inertia Tuning uses the motor speed and torque reference to estimate the system inertia and automatically sets the
drive parameters related to the inertia ratio of the machinery and motor. Use Inertia Tuning for Feed Forward control
or when H1-xx = 7A [MFDI Function Select = KEB Ride-Thru 2 Activate (N.C.)].
Inertia tuning identifies the load inertia and optimizes the speed loop gain and feed forward gain to get a high level of
control capability. You can set the speed response without thinking about the load, which increases the precision when
synchronizing multiple drives. Since the motor can continue to operate during a power outage, Inertia Tuning keeps
the best ramp to stop deceleration curve for KEB Ride-Thru.
■ ASR Tuning
ASR Tuning estimates the motor load inertia and automatically sets the parameters. ASR Tuning also uses the
measured load inertia value to do an automatic adjustment after calculating the proportional gain of speed control
(ASR).
■ Deceleration Rate Tuning
Deceleration Rate Tuning automatically sets the deceleration rate to prevent an ov [Overvoltage] fault during motor
deceleration. Set C1-11 [Accel/Decel Time Switchover Freq] first to automatically set parameters C1-02
[Deceleration Time 1] (high speed range) and C1-08 [Deceleration Time 4] (low speed range).
■ KEB Tuning
KEB Tuning automatically sets parameters used for the KEB Ride-Thru function and for the overvoltage suppression
function.
Control Tuning automatically sets the parameters in Table 3.13 to the best values.
Table 3.13 Parameters set in Control Tuning
Parameters Automatically Set Inertia Tuning ASR Tuning Deceleration Rate Tuning KEB Tuning
C1-02 [Deceleration Time 1]
- - x -
C1-08 [Deceleration Time 4]
- - x
*1
-
C1-09 [Fast Stop Time]
- - - x
*2
C5-01 [ASR Proportional Gain 1]
- x - -
C5-17 [Motor Inertia]
x x - -