Tecorp HC2V8G4160 [141/182] Zero servo disable

Tecorp HC2V9P4315 [141/182] Zero servo disable
High Performance Vector Control/Torque Control Inverter User Manual
Chapter 6 Parameter Description 119
If the encoder is directly mounted on the motor shaft, set this parameter to 1. If the encoder is not
directly mounted on the motor shaft, there exists deceleration ratio between motor shaft and encoder.
0: Zero servo disable
1: Zero servo enable
Note: When Pd.25 is set as 0, “zero servo valid” can be realized through function 66 of X terminal (zero
servo enable terminal). For details, please refer to description of P5 group.
Upon vector control 2 with encoder speed feedback, when the motor speed is less than the rotation
speed corresponding to the zero servo initial frequency Pd.26, if the zero servo enable is valid, it enters
zero servo locking status. At this time, the position of the motor in stop status will be maintained. The
zero servo initial frequency is the condition for the inverter to enter zero servo status. If Pd.26 is too
large, it may cause over-current failure. If adjustment is needed, you may increase/decrease the
leave-factory value. Zero servo gain Pd.27 is the parameter to adjust the zero servo retentivity. When
this value is increased, the zero servo rapidity can be increased. However, if it is too large, it may cause
vibration of the inverter.
Note: For the zero servo function enabled by function code Pd.25, you may exit from the zero servo
mode by setting the frequency higher than the zero servo initial frequency. For the zero servo function
enabled by function 66 of X terminal (zero servo enable terminal), when the terminal is invalid, it exits
from the zero servo mode. It doesn’t matter whether the setting frequency is higher than the zero servo
initial frequency Pd.26 or not.
When the system is under torque control mode, to overcome the static friction force upon zero-speed
operation or startup of the system, static friction compensation coefficient may be set to provide preset
torque increase for the system.
When the system is under torque control mode, the friction force existing during the system operation
will reduce the inverter output torque. Sliding friction compensation coefficient may be set to reduce
the influence of the friction on the inverter output torque.
Pd.24
Deceleration ratio between motor and encoder
(V8 without this function)
0.00165.5351.000
Pd.25
Zero servo enable (V8 without this function)
010
Pd.28 Static friction compensation coefficient (V8 without this function)
0.0100.0 %0.0%
Pd.29 Sliding friction compensation coefficient(V8 without this function)
0.0100.0 %0.0%
Pd.26 Zero servo initial frequency (V8 without this function)
0.0010.00 Hz0.30Hz
Pd.27 Zero servo gain (V8 without this function)
1.0009.9991.000

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