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6 Vector Control
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
6-2 Sensorless Vector Control
6
6-2-3 Auto-tuning of Motor Parameters
4
Operations after auto-tuning
• After normal completion of auto-tuning, set the 1st Motor Parameter selection (H002) to 01
(Auto-tuning).
This enables the 1st/2nd motor parameters (H030 to H034/H230 to H234) set by the
auto-tuning function.
• At the end of auto-tuning, the inverter automatically resets the Auto-tuning Selection (H001) to
00 (Disabled).
To retry auto-tuning, set H001 again to enable auto-tuning.
• During auto-tuning without motor rotation, the Motor Parameter Io (No-load current) and
Motor Parameter J (Moment of inertia J) values are not measured. Set the following
parameters at the end of auto-tuning.
• To operate the inverter with the auto-tuned data after normal completion of auto-tuning, be
sure to change the 1st Motor Parameter selection (H002) setting to 01.
• Adjust the DC Injection Braking Selection (A051) and Output Voltage Gain (A045) values
according to the user environment.
1st/2nd Motor Parameter Io (H033/H233): Measure and set the no-load current of the
single motor at 50 Hz in advance.
Alternatively, check the no-load current of the
motor at 50 Hz with the motor manufacturer
and set it.
1st/2nd Motor Parameter J (H034/H234): Calculate and set the motor-shaft conversion
of the moment of inertia of the load machine.
Parameter No. Function name Data Default data Unit
H002/H202
1st/2nd Motor Parameter
selection
00: Standard motor parameter
01: Auto-tuning
02: Auto-tuning (Online auto-tuning
enabled)
00 –
H030/H230
1st/2nd Motor Parameter
R1 (Auto-tuning Data)
0.001 to 9.999
10.00 to 65.53
Dependent
on motor
capacity
Ω
H031/H231
1st/2nd Motor Parameter
R2 (Auto-tuning Data)
H032/H232
1st/2nd Motor Parameter
L (Auto-tuning Data)
0.01 to 99.99
100.0 to 655.3
mH
H033/H233
1st/2nd Motor Parameter
lo (Auto-tuning Data)
A
H034/H234
1st/2nd Motor Parameter J
(Auto-tuning Data)
0.001 to 9.999
10.00 to 99.99
100.0 to 999.9
1000. to 9999.
kg/m
2
A045 Output Voltage Gain 20. to 100. 100. %
A051
DC Injection Braking
Selection
00: Disabled
01: Enabled
02: Enabled (Operates only at set
frequency)
00 –
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