3.3.5 Motor Parameters Auto-Tuning
For SVC control and applications with higher requirement to control accuracy in
V/f control, 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 mainly used 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.
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
√ √ C1.20: Motor no-load current
√ √ C1.21: Stator resistance
√ √ C1.22: Rotor resistance
√ √ C1.23: Leakage inductance
√ √ C1.24: Mutual inductance
√ √ C3.05: Current loop proportional gain
√ √ C3.06: Current loop integral time
– √ C3.00: Speed loop proportional gain 1
– √ C3.01: Speed loop integral time 1
Tab. 3-7: Parameters obtained by auto-tuning
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Start-up
Rexroth Frequency Converter VFC
3610 / VFC 5610
Bosch Rexroth AG R912005518_Edition 16
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