YASKAWA T1000V, Техническое руководство

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5.8 L: Protection Functions
YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual 191
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Figure 5.68
Figure 5.68 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 drive
decelerates using the deceleration time set in parameter L3-22 (
Refer to L3-22: Deceleration Time at Stall Prevention
during Acceleration on page 192 ). When the current falls below 85% of L3-02, deceleration is stopped. The drive will
attempt to reaccelerate again after 100 ms.
Figure 5.69
Figure 5.69 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.
• 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.
• When operating the motor in the constant power range, also set parameter L3-03.
No.
<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).
Name Setting Range Default
L3-02 Stall Prevention Level during Acceleration 0 to 150%
<1> <1>
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
Output current
L3-02
Output frequency
Time
Time
Deceleration
using L3-22
100 ms
100 ms
15 % of L3-02