YASKAWA A1000 Series Quick Start Manual page 88

4 Start-Up Programming & Operation
Figure 76
Figure 76 Stall Prevention During Acceleration for Permanent Magnet Motors
Setting 2: Intelligent Stall Prevention
When L3-02 = 2, the drive will disregard the selected acceleration time and try to accelerate in the minimum time. The
acceleration rate is adjusted so that the current does not exceed the value set in parameter L3-02.
L3-02: Stall Prevention Level during Acceleration
■
Sets the output current level at which the Stall Prevention during acceleration is activated.
No.
L3-02
<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).
• Stalling may occur when the motor is rated at a smaller capacity than the drive and the Stall Prevention default settings
are used. Set L3-02 as appropriate if stalling occurs.
• When operating the motor in the constant power range, also set parameter L3-03.
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.
No.
L3-03
Figure 77
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.
No.
L3-04
<1> Settings 3 through 5 are not available in OLV/PM. Settings 2 through 5 are not available in AOLV/PM and CLV/PM.
88
Output current
L3-02
Output frequency
Name
Stall Prevention Level during Acceleration
Name
Stall Prevention Limit during Acceleration
Stall Prevention level during Acceleration
Figure 77 Stall Prevention Level and Limit During Acceleration
Name
Stall Prevention Selection During Deceleration
L3-27
L3-27
Deceleration
using L3-22
L3-02
L3-03
Output frequency
E1-06
Base frequency
YASKAWA ELECTRIC TOEP C710616 21C YASKAWA AC Drive - A1000 Quick Start Guide
15 % of L3-02
Time
Time
Setting Range
0 to 150%
<1>
Setting Range
0 to 100%
Setting Range
0 to 5
<1>
Default
<1>
Default
50%
Default
1