YASKAWA L1000A Technical Manual page 205

Setting 0: Disabled
No Stall Prevention is provided. If the acceleration time is too short, the drive may not be able to get the motor up to speed
fast enough, causing an overload fault.
Setting 1: Enabled
Enables Stall Prevention during acceleration.
If the output current rises above the Stall Prevention level set in L3-02, then the drive stops accelerating. Acceleration will
not resume until the output current falls 15% below the setting in L3-02.
The Stall Prevention level is automatically reduced in the constant power range.
Figure 5.34
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.
■
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 are determined by the carrier frequency reduction (L8-38).
• 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.
■
L3-05: Stall Prevention Selection during Run
Determines how Stall Prevention works during Run. Stall Prevention during run prevents the motor from stalling by
automatically reducing the speed when a transient overload occurs while the motor is running at constant speed.
No.
L3-05
Note: 1. This function is available in V/f control mode.
2. Stall Prevention during run is disabled when the output frequency is 6 Hz or lower regardless of the L3-05 and L3-06 settings.
YASKAWA ELECTRIC SIEP C710616 38A YASKAWA AC Drive L1000A Technical Manual
Output current
Stall Prevention Level
During Acceleration
L3-02
L3-02
-15%
Output speed
Controls the output speed
to prevent the motor from stalling
Figure 5.34 Stall Prevention During Acceleration for Induction Motors
Name
Stall Prevention Level during Acceleration
Name
Stall Prevention Selection during Run
5.8 L: Protection Functions
common_TMonly
Time
Time
Setting Range Default
0 to 150%
<1>
Setting Range Default
0 to 2
5
<1>
1
205