1.8 L: Protection Functions
198
YASKAWA ELECTRIC
SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual
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.
Refer to
L3-03: Stall Prevention Limit during Acceleration on page 199
.
Figure 1.79
Figure 1.79 Stall Prevention during Acceleration for Induction Motors
• 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 (refer to
L3-22: Deceleration Time at Stall Prevention during
). When the current falls below 85% of L3-02, deceleration
<1> Setting 2 is not available for PM OLV.
Stall Prevention Level
During Acceleration
L3-02
L3-02
-15%
Output current
Output frequency
Time
Time
Controls the output frequency
to prevent the motor from stalling
Содержание OYMC V1000
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