Yaskawa CIMR-PU2A0081 — stall Prevention Settings for Motor Acceleration Control [236/548]

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Yaskawa CIMR-PU2A0415 [236/548] L3 03 stall prevention limit during acceleration
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L3-01: Stall Prevention Selection during Acceleration
Stall Prevention during acceleration prevents tripping with overcurrent (oC), motor overload (oL1), or drive overload (oL2)
faults common when accelerating with heavy loads.
L3-01 determines the type of Stall prevention the drive should use during acceleration.
No. Name Setting Range Default
L3-01 Stall Prevention Selection during Acceleration 0 to 2 1
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.
Acceleration is reduced when the output current value exceeds 85% of the level set to parameter L3-02 for a longer than the
time set to L3-27. The acceleration stops when the current exceeds L3-02. Acceleration continues when the current falls below
L3-02 for longer than the time set to L3-27.
The Stall Prevention level is automatically reduced in the constant power range. Refer to L3-03: Stall Prevention Limit during
Acceleration on page 236.
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
Figure 5.75 Stall Prevention During Acceleration for Induction Motors
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.
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L3-02: Stall Prevention Level during Acceleration
Sets the output current level at which the Stall Prevention during acceleration is activated.
No. Name Setting Range Default
L3-02 Stall Prevention Level during Acceleration
0 to 150%
<1> <1>
<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.
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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.
5.8 L: Protection Functions
236
YASKAWA SIEP YAIP1U 01A AC Drive - P1000 Technical Manual

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Learn about stall prevention settings during motor acceleration to avoid overload faults. Discover how to configure parameters for optimal performance.