Delta VFD5A5MS43ANSAA User Manual

Chapter 12 Descriptions of Parameter SettingsMS300
392
automatically reduces the output voltage to the motor to a maximum of 200 V
AC
, 50 Hz. If the
input voltage is at 180–200 V
AC
, the output voltage to motor is in direct proportion to the input
voltage.
 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 output voltage changes with the DC bus voltage, and may cause
insufficient current, over-current or oscillation.
 2: The drive disables the AVR function only during deceleration to stop, and at this time, you can
accelerate the braking to achieve the same result.
 When the motor ramps to stop, disable the AVR function to shorten the deceleration time. Then,
use with the auto-acceleration and auto-deceleration functions to make the motor’s deceleration
more stable and quicker.

07-24
Torque Command Filter Time
Default: 0.050
Settings
0.001–10.000 sec.
 IMVF and PMSVC control modes only.
 When the time constant setting is too large, the control is stable but the control response is slow.
When the time constant setting is too small, the control response is faster but the control may be
unstable. For optimal setting, adjust the setting based on the control stability or the control
response.

07-25
Slip Compensation Filter Time
Default: 0.100
Settings
0.001–10.000 sec.
 IMSVC control mode only.
 Change the compensation response time with Pr.07-24 and Pr.07-25.
 If you set Pr.07-24 and Pr.07-25 to 10 seconds, the compensation response time is the slowest;
however, the system may be unstable if you set the time too short.

07-26
Torque Compensation Gain

07-71
Torque Compensation Gain (Motor 2)

07-73
Torque Compensation Gain (Motor 3)

07-75
Torque Compensation Gain (Motor 4)
Default: 1
Settings
IM: 0–10 (when Pr.05-33 = 0)
PM: 0–5000 (when Pr.05-33 = 1 or 2)
 IMVF and PMSVC control modes only.
 With a large motor load, a part of the drive output voltage is absorbed by the stator winding
resistor; therefore, the air gap magnetic field is insufficient. This causes insufficient voltage at
motor induction and results in excessive output current but insufficient output torque. Auto-torque

Delta VFD5A5MS43ANSAA Specifications

General

Brand	Delta
Model	VFD5A5MS43ANSAA
Category	DC Drives
Language	English