Hitachi SJ300-EL Series, Instruction Manual Supplement

Page: 43 / 52

Appendix A - Auto-tuning Procedure
43
Auto-tuning of Motor Constants
The SJ300 inverter features auto-tuning, which detects and records the motor characteristic
parameters to use in all vector control modes. Auto-tuning determines the resistance and
inductance of motor windings. Therefore, the motor must be connected to the inverter for this
procedure. Note that the auto-tuning feature is not associated with PID loop operation, which is
common on some control devices. The auto-tuning procedure must be conducted while the
inverter is stopped (not in Run mode), so it can use special output pulses to detect motor
characteristics. When using the inverter in sensorless vector control, sensorless vector control -
0Hz domain, or vector control with encoder feedback, the motor circuit constants are important. If
they are unknown, then you must first conduct the auto-tuning procedure. The inverter will
determine the constants and write new values for the related “H” Group settings. The auto-tuning
procedure requires that the inverter be configured to operate the 1st motor (do not set the
inverter to use 2nd and 3rd motor data during an auto-tuning procedure).
Function
Code
Name Range Notes
00 Disabled
01 Enabled, without motor rotation (STATIC)
H001
Auto-tuning
Enable Setting
02 Enabled, with motor rotation (DYNAMIC)
00 Inverter uses default TYPICAL motor parameters
01 Inverter uses Auto-tuning motor parameters
H002
Motor data
selection, 1st
motor
02 Adaptive tuning parameters
H003
Motor capacity,
1st motor
0.2 – 75, 0.2 – 160 Units: kW
H004
Motor poles
setting
2 / 4 / 6 / 8 Units: poles
H030
Auto-tuned motor
constant R1
Set automatically Units: ohms
H031
Auto-tuned motor
constant R2
Set automatically Units: ohms
H032
Auto-tuned motor
constant L
Set automatically Units: mH
H033
Auto-tuned motor
constant Io
Set automatically Units: A
H034
Auto-tuned motor
constant J
Set automatically Units: kgm
2
A003
Base frequency
setting
30 to maximum freq. Units: Hz
00 Disabled (Disable during auto-tuning)
A051
DC braking
enable
01 Enabled
200/215/220/230/240
Valid setting choices for 200V class
inverters
A082
AVR voltage
select
380/400/415/440/ 460/480
Valid setting choices for 400V class
inverters