YASKAWA GA700 Technical Manual page 851

• T = Motor rated torque (N∙m)
rated
The rated torque is calculated using the following expression.
P = Motor Rated Power (kW)
Motor
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L3-25: Load Inertia Ratio
No.
Name
(Hex.)
L3-25 Load Inertia Ratio
(046F)
This parameter is enabled when any of the following settings are made.
• 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:
If this value is not set correctly when L2-29 = 1, H1-xx = 7A or 7B, or L3-11 = 1, current ripples could become significant causing faults
such as ov [Overvoltage], Uv1 [DC Bus Undervoltage], and oC [Overcurrent] to be detected.
Automatic Adjustment of 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.
Manual Parameter Input
The load inertia ratio is calculated using the following expression.
■
L3-26: Additional DC Bus Capacitors
No.
Name
(Hex.)
L3-26 Additional DC Bus
Capacitors
(0455)
■
L3-27: Stall Prevention Detection Time
No.
Name
(Hex.)
L3-27 Stall Prevention
Detection Time
(0456)
■
L3-34: Torque Limit Delay Time
No.
Name
(Hex.)
L3-34 Torque Limit Delay
Time
(016F)
Increase the setting value in increments of 0.010 when vibration occurs during operation of Single Drive KEB
Ride-Thru 2.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
V/f CL-V/f OLV CLV AOLV
Sets the ratio between motor inertia and machine inertia.
V/f CL-V/f OLV CLV AOLV
Sets the capacity for external main circuit capacitors. Normally there is no
need to change this setting. Set this parameter when using the KEB Ride-
Thru function.
V/f CL-V/f OLV CLV AOLV
Sets a delay time from when the Stall Prevention level is reached and the
actual Stall Prevention function is activated.
V/f CL-V/f OLV CLV AOLV
Sets the filter time constant in units of seconds used to return the torque
limit to its original value while the KEB operation is executing under Single
Drive KEB Ride-Thru mode.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
11.9 L: Protection Function
Default Setting
(Range)
1.0
(1.0 - 1000.0)
Default Setting
(Range)
0 μF
(0 to 65000 μF)
Default
(Range)
50 ms
(0 - 5000 ms)
Default Setting
(Range)
Determined by A1-02
(0.000 - 1.000 s)
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