3.3.5 Motor Parameters Auto-Tuning
The application with asynchronous motor(ASM)
When SVC control is used or in the condition of V/f control demanding for high-
er control performance, motor parameter auto-tuning is necessary. Two modes
of auto-tuning are available, static auto-tuning and rotational auto-tuning. The
former mode is mainly used for V/f control and the latter is used mainly for SVC
control.
Check and make sure the following points before auto-tuning:
● The motor is in standstill and not at high temperature.
● The power rating of the frequency converter is close to that of the motor.
● Set C1.05...C1.10 based on motor nameplate data. If the power factor data is
unavailable on the nameplate, keep the default setting of C1.10.
● Set E0.08 according to motor parameters and actual application conditions.
Disconnect the load from the motor shaft for rotational auto-tuning.
Set auto-tuning mode and start motor parameter auto-tuning:
Set the following parameter according to the control mode of the frequency con-
verter and the application situation.
Code Name Setting range Default Min. Attri.
C1.01 Motor parameter tuning 0...2 0 – Stop
● 0: Inactive. The auto-tuning function is by default inactive.
● 1: Static auto-tuning. This mode is suggested to be used for V/f control. It can
also be used for SVC control when the load cannot be disconnected.
● 2: Rotational auto-tuning (suggested to be used for SVC control)
Press the <Run> button on the operating panel to start auto-tuning. In the proc-
ess of auto-tuning, a status code 'tUnE' will be displayed on the operating panel.
When the auto-tuning process is complete, the status code disappears and the
settings of the following parameters will be obtained automatically:
Static auto-tuning
Rotational
auto-tuning
Parameters obtained by auto-tuning
√ √ C1.12: Motor rated slip frequency
– √
C1.13: Motor inertia mantissa
①
– √
C1.14: Motor inertia exponent
①
√ √ C1.20: Motor no-load current
√ √ C1.21: Stator resistance
√ √ C1.22: Rotor resistance
√ √ C1.23: Leakage inductance
√ √ C1.24: Mutual inductance
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