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 5.35 Stall Prevention During Acceleration for Induction Motors
n
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 the duty rating and the carrier frequency derating selection (C6-01 and L8-38 respectively).
If stalling occurs with L3-02 set to its default value when using a motor that is relatively small compared to the drive, try
lowering L3-02.
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L3-04: Stall Prevention Selection during Deceleration
Stall
Prevention during deceleration can control the deceleration based on the DC bus voltage and prevent an overvoltage fault
caused by high inertia or rapid deceleration.
Selects the Stall Prevention method during deceleration.
No. Name Setting Range Default
L3-04 Stall Prevention Selection during Deceleration 0, 1, 4 1
Setting 0: Disabled
When this setting is used, the drive decelerates according to the set deceleration time. With high inertia loads or rapid
deceleration, an overvoltage (ov) fault may occur. In this case use braking options or switch to another L3-04 selection.
Note: Use this setting whenever a Dynamic Braking Resistor or another braking option is used.
Setting 1: General Purpose Stall Prevention
With
this setting the drive tries to decelerate in the set deceleration time. When the DC bus voltage exceeds the Stall Prevention
level, the drive pauses deceleration. Deceleration continues as soon as the DC bus voltage drops below that level. Stall
Prevention may be triggered repeatedly to avoid an overvoltage fault. The DC bus voltage level for Stall Prevention depends
on the input voltage setting E1-01.
Drive Input Voltage Stall Prevention Level during Deceleration
200 V Class Vdc = 380 V
400 V Class
E1-01 ≥ 400 V Vdc = 760 V
E1-01 < 400 V Vdc = 660 V
Note: 1. This setting should not be used in combination with a Dynamic Braking Resistor or other braking options. If Stall Prevention during
deceleration is enabled, it will be triggered before the braking resistor option can operate.
2. This method may lengthen the total deceleration time compared to the set value. If this is not appropriate for the application consider
using a braking option.
5.7 L: Protection Functions
YASKAWA ELECTRIC SIEP C710606 31B YASKAWA AC Drive – J1000 Technical Manual
115
5
Parameter Details
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