Hitachi SJ Series User Manual page 165

Chapter 12
12.3.3 Auto-tuning of motor
Ｑ
• Want to use a motor other than Hitachi's.
• Unstable motor operation
• The adjusted motor environment has changed.
• The wiring was changed from the one used in the
trial operation.
• The motor and wires were replaced
Ａ
• The auto-tuning is a function that measures and
automatically sets the motor constants
necessary for the motor control.
• There are two types of auto-tuning functions:
Offline auto-tuning where the auto-tuning function
finishes after a single measurement and online
auto-tuning where the auto-tuning function
measures a change in the constants due to motor
temperature increase every time the motor is
started or stopped.
• Use the offline auto-tuning to measure the motor
constants if you use a motor whose constants are
unknown.
• The online auto-tuning can stabilize the motor
behavior by correcting the temperature increase of
the motor during operation.
Parameters
Item
Auto-tuning selection
Operation command
for auto-tuning
Online tuning
selection
Parameters Data
00
01
[HA-01]
02
03
00
[HA-02]
01
00
[HA-03]
01
• When 02 (revolving) is chosen in the
auto-tuning selection [HA-01], the motor
automatically begins rotating when the
Warning
Injury tuning starts.
Failure
Make sure of the followings.
- No problem shall occur even with the
rotation at a frequency close to 80% of
the base frequency.
- The motor shall not be driven from
Do
external.
- The braking shall be in the open state.
-The torque is not high enough during the
auto-tuning. Lift or other machine could
have unexpected slipping. Remove the
Warning
motor from the loading machine and
Injury
perform the auto-tuning to the
independent motor. (In this case, the
moment of inertia J is that of the
independent motor and hence the
moment of inertia of the loading machine
Do
should be converted to the value about
the motor axis and added to J.)
-For a machine with limited motor axis
rotation (lift, ball screw, etc.), 01
Warning
(non-revolving) should be chosen in
Failure
[HA-01] since rotation higher than the
allowed one could occur causing a
damage to the machine.
Do
Function disabled
Non-revolving auto-tuning is performed. After
this parameter is set, an operation command
starts the tuning.
Revolving auto-tuning is performed. After this
parameter is set, an operation command starts
the tuning.
The tuning for the IVMS control type
is performed. After this parameter is set, an
operation command starts the tuning.
RUN key on the operator keypad
Command is sent from the designated operation
commander.
Function disabled
The online tuning is performed.
The online tuning is automatically performed
after the deceleration stops
in ordinary operations.
12-3-6
Inverter Functions
Description