Lenze i950 Series, Руководство пользователя

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13.7.3 Asynchronous motor (ASM): Identify Lh saturation characteristic
In case of an asynchronous motor, the relationship between current and torque is basically
determined by the saturation behaviour of the mutual inductance. If the achieved torque
accuracy, especially in the field weakening range should not be sufficient, the accuracy can be
increased by the individual identification of the saturation characteristic. This behaviour can
be measured by the servo inverter.
Conditions for the execution
•
Before this commissioning function is executed, the inverter characteristic and the motor
parameters must be identified
4
Motor equivalent circuit diagram data .
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263
•
The motor may be stalled.
•
The inverter is error-free and in " Switched on " device state.
Response of the motor during "standstill" performance
How to identify the L
h
saturation characteristic:
The identification of the L
h
saturation characteristic can take up to 11 minutes.
1 .
If the servo inverter enabled, disable it .
2
.
Select the drive mode [10] in parameter 0x2825 : Lh saturation characteristic identification
3 .
Enable the inverter to start the process.
•
Check the progress in 0x2823:002.
•
Disabling the inverter serves to abort the started procedure any time if required.
Already determined characteristic values are rejected in this case.
After successful completion...
...the inverter will be disabled automatically and the points of the determined L
h
saturation
characteristic are set in the parameters 0x2C07:001 ... 0x2C07:017 .
•
Save the changed settings.
The »EASY Starter« serves to save the parameter settings of the servo inverter as parame-
ter file (*.gdc).
4
Saving the parameter settings
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36
•
The inverter disable set automatically by the procedure can be deactivated again via the
CiA402 control word 0x6040 (setting = 7, 15).
In the event of an error
If an error occurs during the procedure or the pulse inhibit gets active (e.g. due to short-time
undervoltage), the procedure is terminated with inverter disable without the settings being
changed.
Load standard L
h
saturation characteristic
If an incorrect L
h
saturation characteristic has been determined or none at all, it is possible to
load a standard L
h
characteristic.
How to load the standard L
h
saturation characteristic:
1
.
The start is made via the parameter 0x2822:021 = 1.
2
.
For permanent storage: after the process has been completed, save the L
h
saturation char-
acteristic set in .
The »EASY Starter« serves to save the parameter settings of the inverter as parameter file
(*.gdc). Saving the parameter settings
Configuring the motor control
Fine adjustment of the motor model
Asynchronous motor (ASM): Identify Lh saturation characteristic
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