YASKAWA P1000 Technical Manual page 248

5.8 L: Protection Functions
Setting 2: Intelligent Stall Prevention
The drive disregards the selected acceleration time and attempts to accelerate in the minimum time. The acceleration rate is
adjusted so the current does not exceed the value set to parameter L3-02.
n
L3-02: Stall Prevention Level during Acceleration
Sets the output current level at which the Stall Prevention during acceleration is activated.
No.
L3-02
<1> The upper limit and default value is determined by parameter L8-38, Carrier Frequency Reduction.
• Lower L3-02 if stalling occurs when using a motor that is relatively small compared to the drive.
• Also set parameter L3-03 when operating the motor in the constant power range.
n L3-03: Stall Prevention Limit during Acceleration
The Stall Prevention level is automatically reduced when the motor is operated in the constant power range. L3-03 sets the
lower limit for this reduction as a percentage of the drive rated current.
No.
L3-03
248
Output current
Stall Prevention Level
During Acceleration
L3-02
L3-02
-15%
Output frequency
Figure 5.77 Stall Prevention During Acceleration for Induction Motors
Name
Stall Prevention Level during Acceleration
Name
Stall Prevention Limit during Acceleration
Stall Prevention level during Acceleration
E1-06
Base frequency
Figure 5.78 Stall Prevention Level and Limit During Acceleration
Controls the output frequency
to prevent the motor from stalling
L3-02
L3-03
Output frequency
YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual
Time
Time
Setting Range
<1>
0 to 150%
Setting Range
0 to 100%
Default
<1>
Default
50%