Delta C2000 Series User Manual page 530

 VF, VFPG, SVC mode:
Steady-speed: When output is light load, entry into energy saving mode after 5 seconds.
Return: When the drive is continuously adding loads, or in non-steady speed status.
 FOCPM and FOC sensorless control mode, disable.
Energy-saving Gain

Settings
 When Pr. 07-21 is set to 1, use this parameter to adjust the energy-saving gain. The default is
100%. If the result is not satisfactory, adjust it by decreasing the setting value. If the motor
oscillates, then increase the setting value.
 In certain applications such as high speed spindles, the temperature rise in the motor is a major
concern. When the motor is not in working state, reduce the motor current to a lower level.
Reduce this parameter setting to meet this requirement.
Auto Voltage Regulation (AVR) Function

Settings
 The rated voltage of the motor is usually 200V
input voltage of the AC motor drive may vary between 170V
50Hz/60Hz. Therefore, when the AC motor drive is used without the AVR function, the output
voltage is the same as the input voltage. When the motor runs at the voltage exceeding
12%–20% of the rated voltage, it causes higher temperature, damaged insulation, and unstable
torque output, which result in losses due to shorter motor lifetime.
 The AVR function automatically regulates the output voltage of the AC motor drive to the motor
rated voltage. For example, if the V/F curve is set at 200V
200V to 264V
AC
maximum of 200V
motor and input power are in direct proportion.
 0: When the AVR function is enabled, the drive calculates the output voltage according to the
actual DC BUS voltage. The output voltage does NOT change when the DC BUS voltage
changes.
10–1000%
0: Enable AVR
1: Disable AVR
2: Disable AVR during deceleration
, then the drive automatically reduces the output voltage to the motor to a
AC
/ 50Hz. If the input voltage is at 170V
AC
Chapter 12 Description of Parameter SettingsC2000
–240V (380V
AC AC
AC
AC
12.1-07-12
Default: 100
Default: 0
–480V ), 60Hz/50Hz and the
AC AC
–264V (323V
AC AC
/ 50Hz and the input voltage is at
to 200V , the output voltage to
AC
–528V ),
AC AC