6. Control Functions and Parameter Settings
6-76
6-7-2 Speed regulator (IM)
The speed regulator (ASR) is configured of PI control, and has the following parameters.
Parameter
No.
Parameter
Function
A10-0
ASR response
Set the required ASR response in radians
A10-1
Machine time constant1
Set the time to accelerate the motor and load to the base
speed at the rated motor torque.
A10-2
Integral time constant
compensation coefficient
Set the compensation coefficient applied on the integral time
constant of the speed regulator (ASR).
B13-6
ASR gain compensation in
constant power range
This sets the ASR P gain compensation value at the max.
speed.
By adjusting this parameter, the ASR P can be compensated
in the constant power range.
If ASR hunting occurs in the sensor-less control's constant
output range, set a smaller value.
B30-2
ASR proportional change
rate limit
This limit the ASR's Proportional block, if the speed setting
value or motor speed change suddenly,.
6-7-3 Motor Torque limit (IM)
The output torque is limited. Set an appropriate value for protecting the load side.
Drive torque limit)
Set this to a large value to increase the torque during driving. Note that the
output torque is limited by the output current limit (B18-0), so when set
excessively, the set torque may not be attained.
Regenerative torque limit)
Set this to a large value to increase the torque during regeneration. Note
that the output torque is limited by the output current limit (B18-0), so when
set excessively, the set torque may not be attained. If the DBR or PWM
converter, etc., are not provided and an excessively large setting is made,
an overvoltage trip could occur during regeneration. In this case, lower the
regeneration torque limit setting.
Parameter
No.
Parameter
Function
A10-3
ASR drive torque limit
Drive torque limit in ASR control.
A10-4
ASR regenerative torque
limit
Regenerative torque limit in ASR control.
A10-5
Emergency stop
regenerative torque limit
Regenerative torque limit value for emergency stop in ASR
Control.
A11-2
ACR drive torque limit
Drive torque limit in ACR control.
A11-3
ACR regenerative torque
limit
Regenerative torque limit in ACR control.