YASKAWA E1000 Technical Manual page 222

5.8 L: Protection Functions
• Open Loop Vector Control for PM:
If the output current remains above the Stall Prevention level set in L3-02 for the time set in L3-27, then the drive will
begin to decelerate using the deceleration time set in L3-22.
during Acceleration on page
L3-02.
Figure 5.73
Figure 5.73 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 carrier frequency derating selection (L8-38).
• 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 5.74
222
223.) Acceleration will not resume until the output current falls 15% below the setting in
Output current
L3-02
Output frequency
L3-27
Name
Stall Prevention Level during Acceleration
Name
Stall Prevention Limit during Acceleration
Stall Prevention level during Acceleration
Base frequency
Figure 5.74 Stall Prevention Level and Limit During Acceleration
(Refer to L3-22: Deceleration Time at Stall Prevention
L3-27
Deceleration
using L3-22
L3-02
L3-03
Output frequency
E1-06
YASKAWA ELECTRIC SIEP C710616 35D YASKAWA AC Drive E1000 Technical Manual
15 % of L3-02
Time
Time
Setting Range
0 to 150%
<1>
Setting Range
0 to 100%
Default
<1>
Default
50%