Hitachi SJ Series, User Manual

Page: 165 / 786

12-3-6
Chapter 12 Inverter Functions
12.3.3 Auto-tuning of motor
• 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
• 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
• When 02 (revolving) is chosen in the
auto-tuning selection [HA-01], the motor
automatically begins rotating when the
tuning starts.
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
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
motor from the loading machine and
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
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
(non-revolving) should be chosen in
[HA-01] since rotation higher than the
allowed one could occur causing a
damage to the machine.
Item Parameters Data Description
Auto-tuning selection [HA-01]
00 Function disabled
01
Non-revolving auto-tuning is performed. After
this parameter is set, an operation command
starts the tuning.
02
Revolving auto-tuning is performed. After this
parameter is set, an operation command starts
the tuning.
03
The tuning for the IVMS control type
is performed. After this parameter is set, an
operation command starts the tuning.
Operation command
for auto-tuning
[HA-02]
00 RUN key on the operator keypad
01
Command is sent from the designated operation
commander.
Online tuning
selection
[HA-03]
00 Function disabled
01
The online tuning is performed.
The online tuning is automatically performed
after the deceleration stops
in ordinary operations.
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Warning
Injury
Failure
Do
Warning
Injury
Do
Warning
Failure
Do