YASKAWA ELECTRIC
SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
963
•
L2-29 = 1 [KEB Method Selection = Single Drive KEB Ride-Thru 2]
•
L3-04 = 2 [Decel Stall Prevention Selection = Automatic Decel Reduction]
•
L3-11 = 1 [OV Suppression Function Select = Enabled]
•
H1-xx = 7A or 7B [MFDI Function Select = KEB Ride-Thru 2 (N.O./N.C.)]
Note:
When Auto-Tuning changes the value of
E2-11 [Motor Rated Power (kW)]
, the drive will automatically set this parameter to the value
for a Yaskawa standard motor (4 poles). When you use a PM motor, the drive uses the value in
E5-01 [PM Motor Code Selection]
to
change this parameter.
Automatically Adjust Parameters
Execute the Inertia Tuning process when
A1-02 = 3 or 7 [Control Method Selection = Closed Loop Vector
Control or PM Closed Loop Vector Control]
. Parameters are automatically adjusted.
Manually Adjust Parameters
Use this formula to find the motor acceleration time:
•
J
Motor
= Moment of inertia of motor (kg m
2
)
•
n
rated
= Motor rated speed (min
-1
, r/min)
•
T
rated
= Motor rated torque (N∙m)
The rated torque is calculated using the following expression.
P
Motor
= Motor Rated Power (kW)
■
L3-25: Load Inertia Ratio
No.
(Hex.)
Name
Description
Default
(Range)
L3-25
(046F)
Expert
Load Inertia Ratio
Sets the ratio between motor inertia and machine inertia.
1.0
(1.0 - 1000.0)
Set one of these parameters to enable
L3-25
:
•
L2-29 = 1 [Kinetic Energy Backup Method = Single Drive KEB Ride-Thru 2]
•
L3-04 = 2 [Stall Prevention during Decel = Intelligent (Ignore Decel Ramp)]
•
L3-11 = 1 [Overvoltage Suppression Select = Enabled]
•
H1-xx = 7A or 7B [MFDI Function Select = KEB Ride-Thru 2 Activate (N.C./N.O.)]
Note:
•
If you set this value incorrectly when
L2-29 = 1, H1-xx = 7A or 7B
, or
L3-11 = 1
, it can cause large current ripples and
ov
[Overvoltage]
,
Uv1 [DC Bus Undervoltage]
, or
oC [Overcurrent]
faults.
•
KEB Tuning will automatically set this value.
Automatically Adjust Parameters
Do Inertia Tuning when
A1-02 = 3 or 7 [Control Method Selection = Closed Loop Vector or PM Closed Loop
Vector]
. The drive will automatically adjust parameters.
Manually Adjust Parameters
Use this formula to find the load inertia ratio:
■
L3-26: Additional DC Bus Capacitors
No.
(Hex.)
Name
Description
Default
(Range)
L3-26
(0455)
Expert
Additional DC Bus
Capacitors
Sets the capacity for external main circuit capacitors. Sets this parameter
when you use the KEB Ride-Thru function. Usually it is not necessary to
change this setting.
0 μF
(0 to 65000 μF)
V/f
CL-V/f
OLV
CLV
AOLV
OLV/PM
OLV/PM AOLV/PM CLV/PM
EZOLV
V/f
CL-V/f
OLV
CLV
AOLV
OLV/PM
OLV/PM AOLV/PM CLV/PM
EZOLV