Yaskawa Matrix Converter - Manual (Page 187)

6
-22
„ Time Chart
The frequency characteristics when L3-01 is set to 1 appear in the time chart below.
Fig 6.22 Time Chart for Stall Prevention During Acceleration
„ Setting Precautions
• If the motor capacity is relatively small compared to the capacity of the MxC, or if the motor is operated
using default settings, the motor may stall. To prevent this, lower the value set to L3-02.
• If using the motor in the constant output range, L3-02 will be automatically lowered to prevent stalling.
L3-03 is the limit value to prevent the stall prevention level in the constant output range from being
reduced more than necessary.
• Set the parameters as a percent taking the MxC rated voltage to be 100%.
Fig 6.23 Stall Prevention Level and Limit during Acceleration
Output current
Stall level during
acceleration
Time
Time
Output frequency
Output frequency is controlled
to prevent the motor stalling.
L3-02
L3-02
-15%
Stall prevention level during
acceleration
L3-02
(Stall Prevention Level during Acceleration)
L3-02 × L3-03
(Stall Prevention Limit during Acceleration)
Output frequency
E1-06
Base Frequency (FA)