Omron SYSDRIVE 3G3RV Series User Manual

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nAdjusting Slip Compensation Gain
The C3-01 parameter is initialized as shown below for the control method.
• V/f control without PG: 0.0
• Open loop vector control: 1.0
Set C3-01 to 1.0 to compensate the rated slip set using the rated torque output status.
Adjust the slip compensation gain using the following procedure.
1. Set E2-02 (Motor Rated Slip) and E2-03 (Motor No-load Current) correctly.
The motor rated slip is calculated from the values on the motor nameplate using the following formula.
Amount of motor rated slip (Hz) = Motor rated frequency (Hz) - No. of rated rotations (r/min.) × No. of
motor poles / 120
Set the values for rated voltage, rated frequency, and no-load current in the motor unladen current. The
motor rated slip is set automatically in the vector control using autotuning.
2. In V/f control, set C3-01 to 1.0. Setting this parameter to 0.0 disables slip compensation.
3. Apply a load, and measure the speed to adjust the slip compensation gain. Adjust the slip compensation
gain by 0.1 at a time. If the speed is less than the target value, increase the slip compensation gain, and if
the speed is greater than the target value, reduce the slip compensation gain.
nAdjusting Slip Compensation Primary Delay Time Constant
Set the slip compensation primary delay time constant in ms.
The factory setting is related to the control method as follows:
• V/f control without PG: 2000 ms
• Open loop vector control: 200 ms
Normally, there is no need to make these settings. When the slip compensation response is low, lower the set
value. When the speed is unstable, increase the set value.
nAdjusting Slip Compensation Limit
Set the upper limit for the slip compensation amount as a percent, taking the motor rated slip amount as 100%.
If the speed is lower than the target value but does not change even when you adjust the slip compensation
gain, the motor may have reached the slip compensation limit. Increase the limit, and check the speed again.
Make the settings, however, to make sure that the value of the slip compensation limit and reference frequency
does not exceed the tolerance of the machine.
The following diagram shows the slip compensation limit for the constant torque range and fixed output range.
Fig 6.34 Slip Compensation Limit
Slip compensation limit
Output frequency
E1-06: Base frequency
E1-04: Maximum output frequency

Omron SYSDRIVE 3G3RV Series Specifications

General

Brand	Omron
Model	SYSDRIVE 3G3RV Series
Category	Inverter
Language	English