YASKAWA P1000 Technical Manual page 252

5.8 L: Protection Functions
No.
L3-23 Automatic Reduction Selection for Stall Prevention During Run
Setting 0: Disabled
The level set in L3-06 is used throughout the entire speed range.
Setting 1: Enabled
The Stall Prevention level during run is reduced in the constant power range. The lower limit will be 40% of L3-06.
n L3-24: Motor Acceleration Time for Inertia Calculations
Sets the time to accelerate the motor from stop to the maximum speed at motor rated torque. Set this parameter when using
Single Drive KEB 2 (L2-29 = 1), Intelligent Stall Prevention during Deceleration (L3-04 = 2), or the Overvoltage Suppression
function (L3-11 = 1).
No.
L3-24 Motor Acceleration Time for Inertia Calculations
<1> Parameter L3-24 is defaulted for a Yaskawa standard 4-pole motor. During Auto-Tuning, L3-24 will be initialized to a Yaskawa standard 4-pole
motor if parameter E2-11 is changed.
Manual Parameter Setup
Make the calculations in the formula below:
Calculate the rated torque in the formula below:
n L3-25: Load Inertia Ratio
Determines the ratio between the rotor inertia and the load. Set this parameter when using Single Drive KEB 2 (L2-29 = 1),
Intelligent Stall Prevention during deceleration (L3-04 = 2), or the overvoltage suppression function (L3-11 = 1).
No.
L3-25
When set incorrectly, a fairly large current ripple can result during Single Drive KEB 2 (L2-29 = 1). This may cause overvoltage
suppression (L3-11 = 1) or other faults such as ov, Uv1, and oC.
Manual Parameter Setup
Calculate parameter L3-25 in the formula below:
n L3-26: Additional DC Bus Capacitors
Sets the capacity of any additionally installed DC bus capacitors. This data is used in calculations for Single Drive KEB Ride-
Thru 2. Adjust this setting only if external capacity is connected to the DC bus and Single Drive KEB 2 is used.
No.
L3-26
n L3-27: Stall Prevention Detection Time
Sets a delay time from when the Stall Prevention level is reached and the actual Stall Prevention function is activated.
No.
L3-27
252
Name
Name
2
L3-24 =
T [Nm] =
rated
Name
Load Inertia Ratio
L3-25 =
Name
Additional DC Bus Capacitors
Name
Stall Prevention Detection Time
Setting Range
0.001 to 10.000 s
J [kgm 2 ] n [r/min]
rated
60 T [Nm]
rated
60 P [kW] 10
3
Motor
2 n [r/min]
rated
Machine Inertia
Motor Inertia
YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual
Setting Range
0, 1
Default
Determined by o2-04
Setting Range
1.0 to 1000.0
Setting Range
0 to 65000 μF
Setting Range
0 to 5000 ms
Default
0
<1>
Default
1.0
Default
0 μF
Default
50 ms