Carrying Out Motor Auto-Tuning; Procedure For Auto-Tuning Of An Induction Motor - Hitachi WJ Series User Manual

Chapter 8

8.3 Carrying Out Motor Auto-tuning

8.3.1

Procedure for Auto-tuning of an Induction Motor

 How to use a motor other than the Hitachi standard induction motor?
Q
 How to solve the unstable drive of the motor?
 What should be done if the environment of the adjusted motor has changed?
 What should be done if wiring was re-performed from the test run condition?
 What should be done if the motor and wiring were replaced?
 The auto-tuning function measures the required motor constants and sets them automatically to
A
increase the accuracy of automatic torque boost, sensorless vector control, etc.
 When using a motor whose motor constants are unknown, perform auto-tuning to measure the
motor constants.
 "Motor rotate" and "Motor not rotate" can be selected for auto-tuning. Select according to the
situation.
 The measured motor constants are data (including wiring) for one phase of Y connection.
 The motor constants of Hitachi standard induction motor are set as default value. When using a
!
Hitachi standard induction motor, characteristics can be obtained without problems in most
cases even if auto-tuning is not performed.
 Smooth tuning could be done if the auto-tuning is first performed for the factory-set parameters.
 The motor capacity that can be measured is the maximum applicable capacity and one size
smaller capacity. Otherwise, the correct constants may not be obtained. When performing auto-
tuning with one size smaller capacity motor, set "Overload restriction 1 mode selection [b021]"
to "Enable during accel. and constant speed (01)", and set "Overload restriction 1 active level
[b022]" to 1.5 times the motor rated current.
■ When using the motor constant of auto-tuning
Code
[H001] Auto-tuning selection
Async. Motor constant
*1
[H002]
selection
*1
[H003] Async. Motor capacity
Async. Motor number of
*1
[H004]
poles
Async. Motor constant R1
*1
[H030]
(Auto-tuning data)
Async. Motor constant R2
[H031] *1
(Auto-tuning data)
Async. Motor constant I0
*1
[H033]
(Auto-tuning data)
Async. Motor constant J
*1
[H034]
(Auto-tuning data)
*1
[A003] Base frequency
[A045] *1 Output voltage gain
[A082] *1 Motor rated voltage
Motor cable length code
[b033]
selection
*1. "2nd-motor control [SET]" target parameter. The second control parameter is also subject to setting.
Mandatory Setting for Motor Drive and Test Run
Item
Disable
Enable without rotation
Enable with rotation
Auto-tuning data
(Apply [H030]
Set according to the specifications of the
motor.
Set according to the specifications of the
motor.
Parameter for setting the motor constant
when performing auto-tuning.
When using these parameters, set
"Async. Motor constant selection
*1
[H002]
performing auto-tuning, it is also
possible to adjust and change it
manually.
Set according to the specifications of the
motor.
If an appropriate value does not exist in
[A082], adjust it.
Set according to the specifications of the
motor.
Parameter that corrects the current detection
accuracy due to difference in motor cable
length. If the motor constant cannot be
measured correctly, set higher value.
8-3-1
Description
*1 *1
to [H034] )
" to "Auto-tuning data (02)". After
Data
00
01
02
02
0.1 to 18.5 (kW)
2/4/6/ to /46/48 (poles)
0.001 to 65.535 (Ω)
0.001 to 65.535 (Ω)
0.01 to 655.35 (A)
0.001 to
2
9999.000 (kgm )
30.0 to
Maximum frequency (Hz)
20 to 100 (%)
200 V: 200/215/220/
230/240 (V)
400 V: 380/400/415/
440/460/480 (V)
5 to 20