Sensorless Vector Control
CON-39 PM SpdEst Kp 0
CON-40 PM SpdEst Ki 0
CON-41 PM SpdEst Kp 1
CON-42 PM SpdEst Ki 1
CON-43 PM SpdEst Kp 2
CON-44 PM SpdEst Ki 2
Set these parameters to change the speed estimator gain during a PM
synchronous motor operation in sensorless vector control mode.
CON-39, 40 is applied at starting.
If faults occur or excessive oscillation is observed at starting and low speeds,
decrease the value at CON-39, 40 until the motor operates stably.
CON-41, 42 Gain is applied from low speed to medium speed.
CON-43, 44 gain is applied at medium speed or higher.
When oscillation is occurring, lower the gain value appropriate for the speed.
And when pulsation is occurring in normal status, the value of I gain should
be set higher.
CON-45 PM EdGain Perc
CON-46 PM EqGain Perc
To ensure that the back-EMF with rotor position information can be
appropriately estimated during a PM synchronous motor operation in
sensorless vector control mode, set these values as a percentage of the
proportional gain, which is designed to have stable estimator polarity.
Higher values result in faster responses, with higher chances of increased
motor vibration.
Excessively low values may result in motor startup failure due to slow
response rate.
Sets the output compensation values during a PM synchronous motor
operation in sensorless vector control mode. If the motor fails to operate at low
speeds at or below 5% of the rated motor speed, increase the values set at
CON-47 by 10% increments. Decrease the values in 10% decrements if a
clanking noise occurs at motor startup and motor stop.
CON-48 ACR P-Gain
CON-49 ACR I-Gain
Sets the gain values for the PI current controller in a synchronous motor.
The P gain is the proportional gain for the current deviation. The current
deviation decreases faster with higher values, as the deviation in voltage
output command increases with increased deviation. The I gain is the integral
gain for the current deviation. Deviation in normal operation decreases with
higher values.
However, the gain values are limited by the carrier frequency. A fault may
occur due to interference if you set the gain values too high
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