YASKAWA E1000 User Manual

5.8 L: Protection Functions
222 YASKAWA ELECTRIC SIEP C710616 35D YASKAWA AC Drive E1000 Technical Manual
• 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. (Refer to L3-22: Deceleration Time at Stall Prevention
during Acceleration on page 223.) Acceleration will not resume until the output current falls 15% below the setting in
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.
• 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.
Figure 5.74
Figure 5.74 Stall Prevention Level and Limit During Acceleration
No.
<1> The upper limit and default value is determined by the carrier frequency derating selection (L8-38).
Name Setting Range Default
L3-02 Stall Prevention Level during Acceleration 0 to 150% <1> <1>
No. Name Setting Range Default
L3-03 Stall Prevention Limit during Acceleration 0 to 100% 50%
Output current
L3-02
Output frequency
Time
Time
Deceleration
using L3-22
L3-27
L3-27
15 % of L3-02
Stall Prevention level during Acceleration
Output frequency
L3-03
E1-06
Base frequency
L3-02
SIEP_C710616_35.book 222 ページ ２０１５年１１月３０日 月曜日 午後２時２分

YASKAWA E1000 Specifications

General

Brand	YASKAWA
Model	E1000
Category	Controller
Language	English