Delta VFD17AME43AFNAA User Manual

Chapter 12 Description of Parameter SettingsME300
12.1-07-11
 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 shorter when setting this parameter to 2
with auto-acceleration and deceleration, and the deceleration is quicker and more stable.

Torque Command Filter Time (V/F and SVC Control Mode)
Default: 0.050
Settings 0.001–10.000 sec.
 When the setting is too long, the control is stable but the control response is delayed. When the
setting is too short, the response is quicker but the control may be unstable. Adjust the setting
according to the stability of the control and response times.

Slip Compensation Filter Time (V/F and SVC Control Mode)
Default: 0.100
Settings 0.001–10.000 sec.
 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.

Torque Compensation Gain
. Torque Compensation Gain (Motor 2)
Default: 1
Settings IM: 0–10 (when Pr.05-33 = 0)
PM: 0–5000 (when Pr.05-33 = 1 or 2)
 With a large motor load, a part of 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
compensation can automatically adjust the output voltage according to the load and keep the air
gap magnetic fields stable to get the optimal operation.
 In the V/F control, the voltage decreases in direct proportion with decreasing frequency. It
reduces the torque decrease at low speed due to the AC while the DC resistor is unchanged. The
auto-torque compensation function increases the output voltage at low frequency to get a higher
starting torque.
 When the compensation gain is set too high, it may cause motor over-flux and result in a too
large output current, overheating the motor or triggering the protection function.

Delta VFD17AME43AFNAA Specifications

General

Brand	Delta
Model	VFD17AME43AFNAA
Category	DC Drives
Language	English