Motor Hunting And Oscillation Control Parameters - YASKAWA V1000 Technical Manual

6.2 Motor Performance Fine Tuning
<2> Default settings change when the Control Method is changed (A1-02) or a different V/f pattern is selected using parameter E1-03. The default
setting shown is for V/f Control.
When using OLV Motor Control, leave the torque compensation gain (C4-01) at its default setting of 1.00. To increase
speed precision during regeneration in OLV Motor Control, enable slip compensation during regeneration (C3-04 = "1").
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Motor Hunting and Oscillation Control Parameters

In addition to the parameters discussed on page 162, the following parameters indirectly affect motor hunting and
oscillation.
Name (Parameter No.)
Dwell Function (b6-01 through b6-04)
Accel/Decel Time (C1-01 through
C1-09)
S-Curve Characteristics (C2-01
through C2-04)
Jump Frequency (d3-01 through d3-04) Skips over the resonant frequencies of connected machinery.
Analog Filter Time Constant (H3-13)
Stall Prevention (L3-01 through L3-06,
L3-11)
Torque Limits (L7-01 through L7-04,
L7-06, L7-07)
248
Table 6.3 Parameters that Affect Control Performance in Applications
Prevents motor speed loss by maintaining the output frequency when working with heavy loads or when
there is powerful backlash on the machine side.
Adjusting accel and decel times will affect the torque presented to the motor during acceleration or
deceleration.
Prevents shock at the beginning and end of acceleration and deceleration.
Prevents fluctuation in the analog input signal due to noise.
• Prevents motor speed loss and overvoltage. Used when the load is too heavy and also during sudden
acceleration/deceleration.
• Adjustment is not normally required because Stall Prevention is enabled as a default. Disable Stall
Prevention during deceleration (L3-04 = "0") when using a braking resistor.
• Sets the maximum torque for Open Loop Vector Control.
• Ensure that the drive capacity is greater than the motor capacity when increasing this setting. Be careful
when reducing this value because motor speed loss may occur with heavy loads.
Application
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual