YASKAWA V1000 Technical Manual page 211

n L3-01: Stall Prevention Selection during Acceleration
Stall Prevention during acceleration is used when the motor loses speed during acceleration due to a relatively large load.
It prevents overcurrent and motor overload (oL1) from occurring.
This parameter sets the Stall Prevention method for acceleration.
No.
L3-01 Stall Prevention Selection during Acceleration
<1> Setting 2 is not available for PM OLV.
Setting 0: Disabled
No Stall Prevention is provided. If the acceleration time setting is too short, the drive may not be able to accelerate within
the set time and the motor may stall.
Setting 1: Enabled
Enables Stall Prevention during acceleration. The operation depends on the selected control mode.
• V/f or Open Loop Vector Control:
When the output current exceeds 85% of the level set in parameter L3-02, the acceleration rate is reduced. The
acceleration is stopped when the current exceeds L3-02. Acceleration continues when the current falls below L3-02.
The Stall Prevention level is automatically reduced in the field weakening area.
During Acceleration on page
• Open Loop Vector Control for PM:
Acceleration is stopped when the output current reaches the level set in parameter L3-02, and after 100 ms the drive
decelerates using the deceleration time set in parameter L3-22
During Acceleration on page
attempt to reaccelerate again after 100 ms.
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
Name
212.
Output current
Stall Prevention Level
During Acceleration
L3-02
L3-02
-15%
Output frequency
Controls the output frequency
to prevent the motor from stalling
Figure 5.81 Stall Prevention During Acceleration for Induction Motors
212). When the current falls below 85% of L3-02, deceleration is stopped. The drive will
5.8 L: Protection Functions
Setting Range
0 to 2
Refer to L3-03: Stall Prevention Limit
Time
Time
(Refer to L3-22: Deceleration Time at Stall Prevention
Default
<1> 1
5
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