YASKAWA V1000 Series, Installation & Start-Up Manual

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5.2 Motor Performance Fine Tuning
180 YASKAWA ELECTRIC TOEP C710606 09B YASKAWA AC Drive V1000 Installation & Start-Up Manual
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Motor Hunting and Oscillation Control Parameters
In addition to the parameters discussed in V/f Pattern Selection: E1-03 on page 139 , the
following parameters indirectly affect motor hunting and oscillation.
Table 5.3 Parameters that Affect Control Performance in Applications
Name (Parameter No.) Application
Dwell Function
(b6-01 through b6-04) Prevents motor speed loss by maintaining the output frequency when working
with heavy loads or when there is powerful backlash on the machine side.
Accel/Decel Time
(C1-01 through C1-11) Adjusting accel and decel times will affect the torque presented to the motor
during acceleration or deceleration.
S-Curve Characteristics
(C2-01 through C2-04)
Prevents shock at the beginning and end of acceleration and deceleration.
Jump Frequency
(d3-01 through d3-04)
Skips over the resonant frequencies of connected machinery.
Analog Filter Time Constant
(H3-13)
Prevents fluctuation in the analog input signal due to noise.
Stall Prevention
(L3-01 through L3-06, L3-11)
• 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.
Torque Limits
(L7-01 through L7-04, L7-06,
L7-07)
• 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.