Sensorless Vector Control Operation Setting Details for Induction Motors
Sets pre-excitation time. Pre-excitation is used to start the
operation after performing excitation up to the motor’s rated flux.
Allows for the reduction of the pre-excitation time. The motor flux
increases up to the rated flux with the time constant as shown in
the following figure.
To reduce the time taken to reach the rated flux, a higher motor flux
base value than the rated flux must be provided. When the
magnetic flux reaches the rated flux, the provided motor flux base
value is reduced.
Sets the zero-speed control time (hold time) in the stopped position.
The output is blocked after zero-speed operation for a set period
when the motor decelerates and is stopped by a stop command.
Cn.21 Out Trq.
Comp. Gain at Low
Spd
Cn.21 mainly has an effect on the low-speed operations. For details,
refer to p.139 in the 5.10.2 Sensorless Vector Control Operation
Guide for Induction Motors.
Cn.22 ScaleOut Trq.
Comp. Gain
Cn.22 is related to the torque load quantity that can mostly be
produced by the inverter. For details, refer to p.139 in the 5.10.2
Sensorless Vector Control Operation Guide for Induction
Motors.
Cn.23 Spd. Comp.
Sub Gain
Cn.23 mainly has an effect on the motor speed. For details, refer to
p.139 in the 5.10.2 Sensorless Vector Control Operation
Guide for Induction Motors.
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