Chapter 4 Description of Parameters | VFD-VJ
4-38
3. Set the rated voltage Pr.01-04, rated frequency Pr.01-03, rated current Pr.01-08, rated power Pr.01-09,
rated speed Pr.01-10, and number of poles Pr.01-11 of the motor with correct values, respectively. For
the acceleration/deceleration time, please set the correct values.
4. Set Pr.01-07 as 1 and then press the RUN button on the keypad. The auto tuning process for the motor
is carried out immediately. (Note: the motor starts running).
5. After the process is finished, check if the motor’s parameters (Pr.01-13 ~ Pr.01-16) have been
automatically entered with the measurement data.
6. Equivalent circuit of the motor
Pr. 01-13
Pr .01-16
Pr.01-15
Motor equivalent circuit used by VJ
V
S
I
Pr. 01-14
Rs
Rr
Lx
Lm
NOTE
※.When the static tuning (Pr.01-07 = 2) is used, you must enter the no-load current to the motor. It is
generally 20 to 50% of the rated current.
If the parameter is set as 5 or 13, it will perform the parameter automatic tuning for the synchronous motor.
In this case, press the [Run] button to perform the automatic measurement operation immediately. After the
measurement is complete, the values are filled into Pr.01-22 (Rs), Pr.01-23 & 24 (Ld & Lq), Pr.01-25 (Back
EMF of the synchronous motor), respectively.
Synchronous motor AUTO-Tuning procedure: (static measurement)
1. All parameters of the hybrid servo drive are set to factory settings and the motor is connected
correctly.
2. Set the rated current Pr.01-17, rated power Pr.01-18, rated speed Pr.01-19, and number of poles
Pr.01-20 of the motor with correct values, respectively. For the acceleration/deceleration time, please
set the values according to the motor’s capacity.
3. Set Pr.01-07 as 5 and then press the RUN button. The auto tuning process for the motor is carried
out immediately. (Note: the motor starts running slightly).
4. After the process is finished, check if the motor’s parameters (Pr.01-22 ~ Pr.01-25) have been
automatically entered with the measurement data.
If the parameter is set as 4, the automatic measurement of the angle between magnetic pole and the PG
origin for the synchronous motor is performed. In this case, press the [Run] button to immediately perform
automatic measurement. The measured data will be entered into Pr.01-27.
Angle between magnetic pole and the PG origin Auto-Tuning process for the synchronous motor:
1. After the measurement process for parameter value of 5 is performed completely or manually enter
the Pr.01-03, Pr.01-17 to Pr.01-25, respectively.
2. Before tuning, it is recommended to separate the motor and the load.
3. Set Pr.01-07 as 4 and then press the RUN button on the keypad. The auto tuning process for the
motor is carried out immediately. (Note: the motor starts running).
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