n L3-01: Stall Prevention Selection during AccelerationStall 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. Name Setting Range DefaultL3-01 Stall Prevention Selection during Acceleration 0 to 2 <1> 1<1> Setting 2 is not available for PM OLV.Setting 0: DisabledNo Stall Prevention is provided. If the acceleration time setting is too short, the drive may not be able to accelerate withinthe set time and the motor may stall.Setting 1: EnabledEnables 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. Theacceleration 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 LimitDuring Acceleration on page 212.Stall Prevention LevelDuring AccelerationL3-02L3-02-15%Output currentOutput frequencyTimeTimeControls the output frequencyto prevent the motor from stallingFigure 5.81 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 drivedecelerates using the deceleration time set in parameter L3-22 (Refer to L3-22: Deceleration Time at Stall PreventionDuring Acceleration on page 212). When the current falls below 85% of L3-02, deceleration is stopped. The drive willattempt to reaccelerate again after 100 ms.5.8 L: Protection FunctionsYASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual 2115 Parameter Details
