Delta CP2000 Series, User Manual

Page: 491 / 868

Chapter 12 Description of Parameter Settings

CP2000
12.1-07-11
 VF and SVC mode:
Steady-speed: When output is light load, entry into the energy saving mode after 5 seconds.
Return: When the drive is continuously adding loads, or in non-steady speed status.

Energy-saving Gain
Default: 100
Settings 10–1000%
 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
Default: 0
Settings 0: Enable AVR
1: Disable AVR
2: Disable AVR during deceleration

The rated voltage of the motor is usually 200 V
AC
–240 V
AC
(380 V
AC
–480 V
AC
), 60Hz/50Hz and
the input voltage of the AC motor drive may vary between 170 V
AC
–264 V
AC
(323 V
AC
–528 V
AC
),
50Hz/60Hz. Therefore, when the AC motor drive is used without 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 200 V
AC
/ 50 Hz and the input voltage is at
200 V
AC
to 264 V
AC
, then the drive automatically reduces the output voltage to the motor to a
maximum of 200 V
AC
/ 50 Hz. If the input voltage is at 170 V
AC
to 200 V
AC
, the output voltage to
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.

1: when the AVR function is disabled, the drive calculates the output voltage according to the
actual DC bus voltage. The DC bus voltage changes the output voltage, and may cause
insufficient or over-current or shock.

2: the drive disables the AVR function when decelerating to stop, and may accelerate to brake.

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.

Torque Command Filter Time (V/F and SVC Control Mode)
Default: 0.500
Settings 0.001–10.000 sec.