Filter Time Of Torque Command (V/F And Svc Control Mode); Filter Time Of Slip Compensation (V/F And Svc Control Mode); Torque Compensation Gain (V/F And Svc Control Mode) - Delta C2000 series User Manual

For instance, if V/f curve is set at 200 VAC/50Hz and the input voltage is at 200V to 264VAC, then
the motor Output Voltage will automatically be reduced to a maximum of 200VAC/50Hz. If the
input voltage is at 180V to 200VAC, output voltage to motor and input power will be in direct
proportion.
Setting 0: when AVR function is enabled, the drive will calculate the output voltage by actual
DC-bus voltage. The output voltage won't be changed by DC bus voltage.
Setting 1: when AVR function is disabled, the drive will calculate the output voltage by DC-bus
voltage. The output voltage will be changed by DC bus voltage. It may cause insufficient/over
current.
Setting 2: the drive will disable the AVR during deceleration, such as operated from high speed to
low speed.
When the motor ramps to stop, the deceleration time is longer. When setting this parameter to 2
with auto acceleration/deceleration, the deceleration will be quicker.
When it is in FOCPG or TQCPG, it is recommended to set to 0 (enable AVR).

Filter Time of Torque Command (V/F and SVC control mode)

Settings 0.001~10.000 sec
When the setting is too long, the control will be stable but the control response will be delay. When
the setting is too short, the response will be quickly but the control may be unstable. User can
adjust the setting by the control and response situation.

Filter Time of Slip Compensation (V/F and SVC control mode)

Settings 0.001~10.000 sec
It can set Pr.05-22 and 05-23 to change the response time of compensation.
If Pr.05-22 and 05-23 are set to 10seconds, the response time of compensation is the slowest. But
the system may be unstable when the setting is too short.

Torque Compensation Gain (V/F and SVC control mode)

Settings 0~10
When the motor load is large, a part of drive output voltage is absorbed by the resistor of stator
winding and causes insufficient voltage at motor induction and result in over output current and
insufficient output torque. It can auto adjust output voltage by the load and keep the air gap
magnetic fields stable to get the optimal operation.
In the V/F control, the voltage will be decreased in direct proportion when the frequency is
decreased. It'll cause decrease torque at low speed due to small AC resistor and the same DC
resistor. Therefore, Auto torque compensation function will increase the output voltage in the low
frequency to get higher start torque.
When Pr.07-26 is set to large, it may cause motor overflux and result in too large output current,
motor overheat or triggers protection function.
Chapter 12 Description of Parameter Settings|C2000 Series
12-123
Factory Setting: 0.020
Factory Setting: 0.100
Factory Setting: 0