Delta C2000 Series User Manual page 389

Energy-saving Gain
Settings 10~1000%
When Pr. 07-21 is set to 1, this parameter can be used to adjust the gain of energy-saving. The
factory setting is 100%. If the result is not good, it can adjust by decreasing the setting. If the
motor oscillates, it should increase the setting value.
At some special application such as High speed spindle, the motor temperature rise is been
highly concern. Thus, when the motor is not working with load, the motor current will requested to
reduce to a lower level. To Lowering this parameter setting can meet this requirement.
Auto Voltage Regulation(AVR) Function
Settings 0: Enable AVR
1: Disable AVR
2: Disable AVR during deceleration
The rated voltage of the motor is usually 220V/200VAC 60Hz/50Hz and the input voltage of the
AC motor drive may vary between 180V to 264 VAC 50Hz/60Hz. Therefore, when the AC motor
drive is used without AVR function, the output voltage will be the same as the input voltage. When
the motor runs at voltages exceeding the rated voltage with 12% - 20%, its lifetime will be shorter
and it can be damaged due to higher temperature, failing insulation and unstable torque output.
AVR function automatically regulates the AC motor drive output voltage to the motor rated voltage.
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.
Chapter 12 Description of Parameter Settings C2000 Series
12-07-8
Factory Setting: 100
Factory Setting: 0
Factory Setting: 0.020