Delta VFD-EL-W Series User Manual

Chapter 4 Parameters｜VFD-EL-W
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 Assume that the motor rated frequency is 60 Hz with 4 poles, and the rated motor speed is 1650
rpm. The rated slip calculated by the formula is 60 Hz – (1650 rpm × 4/ 120) = 5 Hz.
 This parameter is related to Pr.07.03 Slip Compensation Gain. To get the best slip compensation
effect, you must enter the correct settings. The incorrect setting may cause invalid slip
compensation and even damage to the motor and to the AC motor drive.
Related Parameters: Pr.07.03 Torque Compensation Gain
07.07
Slip Compensation Limit
Default: 200
Settings
0–250%
 Sets the upper limit of the compensation frequency for the correction amount of the slip
compensation function, that is, the multiplier of Pr.07.06 motor rated slip. If the motor speed is
lower than the target speed and the speed does not change after adjusting the Pr.07.03 setting,
the AC motor drive may reach the upper limit of the compensation frequency. Increase the
Pr.07.07 setting and check again.
Related parameters:
 Pr.07.03 Torque Compensation Gain
 Pr.07.06 Motor Rated Slip
07.08
Torque Compensation Low Pass Filter Time
Default: 0.10
Settings
0.01–10.00 sec.
 This function is usually applied in applications with heavy load where the motor current changes
frequently for the current compensation to increase the output torque. The frequent current
change causes machine vibration. Increase the Pr.07.08 setting to solve this problem.
07.09
Slip Compensation Low Pass Filter Time
Default: 0.20
Settings
0.05–10.00 sec.
 This function is usually applied in applications with heavy load where the motor current changes
frequently for the current compensation to reach the synchronous speed. The frequent current
change causes machine vibration. Increase the Pr.07.09 setting to solve this problem.
 If you set Pr.07.08 and Pr.07.09 to 10 seconds, the compensation response time is the slowest;
however, the system may be unstable if you set the time too short.
07.10
Accumulated Motor Operation Time (minutes)
Default: 0
Settings
0–1439
07.11
Accumulated Motor Operation Time (days)
Default: 0
Settings
0–65535
 Record the motor operation time. To clear the operation time, set Pr.07.10 and Pr.07.11 to 0. Any
operation time shorter than 60 seconds is not recorded.

Delta VFD-EL-W Series Specifications

General

Brand	Delta
Model	VFD-EL-W Series
Category	DC Drives
Language	English