The Operations And Adjustments Of Sensorless Vector Control - TECO speecon 7200ma Instruction Manual

•The Operations and Adjustments of Sensorless Vector Control：
1. Make sure the inverter capacity and motor rating is suitable matched. Used the
AUTOTUNE feature to identify and store the motor parameters in the first time
sensorless vector operation after installation, and key in the motor rated voltage
data onto Cn-03 and the motor rated frequency onto Cn-04 according to the
motor nameplate.
2. Enable the sensorless vector control mode by setting Sn-67=1.
3. Increase the setting Cn-57 to increase the generating torque at low speed.
Decrease the setting Cn-57 to reduce the generating torque to avoid over current
trip at low speed.
4. Adjust the setting Cn-61 if the speed accuracy need to improve. When the actual
speed is low, increase the set value and when the actual speed is high, decrease
the set value.
5. If the motor speed is not stable or the load inertia is too large, increase the
Cn-40 (slip compensation primary delay time) setting.
If the speed response is slow, decrease the setting of Cn-40.
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