Delta VFD015EL43W-1 - Motor Rated Current; Motor No-Load Current; Torque Compensation; Slip Compensation Gain

Chapter 4 Parameters  VFD-EL-W
4-65
Group 7: Motor Parameters
 You can set this parameter during operation.
07.00
Motor Rated Current Unit: 0.1
Settings 23% FLA–120% FLA Default: 100
 Use the following formula to calculate the percentage value entered in this parameter:
FLA = (Motor Current / AC Motor Drive Current) x 100%
Motor Current = Motor rated current in A on the motor nameplate
AC Motor Drive Current = Rated current of AC motor drive in A (see Pr.00.01)
07.01
Motor No-load Current Unit: 0.1
Settings 0% FLA–99% FLA Default: 40
 The rated current of the AC motor drive is equal to 100%. The setting for the motor no-load current affects the
slip compensation.
 The setting value must be smaller than Pr.07.00 (Motor Rated Current).
07.02
Torque Compensation Unit: 0.1
Settings 0.0–10.0 Default: 0.0
 Sets the AC motor drive to automatically increase voltages to get a higher torque when the AC motor drive is
running.
 Note that too high a torque compensation can overheat the motor.
07.03
Slip Compensation Gain Unit: 0.01
Settings 0.00–10.00 Default: 0.00
 For an asynchronous motor, increasing the load on the AC motor drive causes slip to increase and results in
decreased speed. Use this parameter to compensate for slip by increasing the output frequency. When the
output current of the AC motor drive is larger than the motor no-load current value (Pr.07.01), the AC motor
drive adjusts the output frequency according to this parameter.
07.04
Motor Parameter Auto-Tuning
Settings 0: Disable
1: Auto-tuning R1 (Motor does not run)
2: Auto-tuning R1 + No-load current (with
running motor)
Default: 0
 Start auto-tuning by pressing the RUN key after you set this parameter to 1 or 2.
1: Auto-detect only the R1 value, and manually enter Pr.07.01.
2: Unload the AC motor drive and automatically set the values for Pr.07.01 and Pr.07.05.
The steps for auto-tuning are:
1. Ensure that all the parameters are set to defaults and the motor wiring is correctly.
2. Ensure that the motor is not loaded before executing auto-tuning and that the shaft is not connected to
any belt or reducer.
3. Enter the correct settings for Pr.01.01 Motor Rated Frequency (Fbase), Pr.01.02 Motor Rated Voltage
(Vbase), Pr.07.00 Motor Rated Current, and Pr.07.06 Motor Rated Slip (Motor 0).
4. After you set Pr.07.04 to 2, the AC motor drive executes auto-tuning immediately after receiving a RUN
command (CAUTION: the motor will run!). The total auto-tuning time is 15 seconds = Pr.01.09 + Pr.01.10.
Higher-power drives need longer acceleration and deceleration time (the default is recommended). After
executing auto-tuning, it sets Pr.07.04 to 0.
5. After executing auto-tuning, check to ensure there are values filled in for Pr.07.01 and Pr.07.05. If not,
press the RUN key after setting Pr.07.04 again to repeat auto-tuning.
6. Finally, set Pr.00.10 to 1 and set other parameters according to your application requirements.
 Related parameters: Pr.01.01 Motor Rated Frequency (Fbase); Pr.01.02 Motor Rated Voltage
(Vbase); Pr.07.00 Motor Rated Current; Pr.07.01 Motor No-Load Current; Pr.07.05 Motor Line-to Line
Resistance R1 (Motor 0); Pr.07.06 Motor Rated Slip (Motor 0).
.
NOTE
1. In vector control mode, it is not recommended to have motors run in parallel.