Learning Advanced Features
Cn.41 PM SpdEst Kp,
Cn.42 PM SpdEst Ki
Cn.43 PM SpdEst Kp2
Cn.44 PM SpdEst Ki2
Set these parameters to change the speed estimator gain during a PM
synchronous motor operation in sensorless vector control mode.
If fault trips occur or excessive oscillation is observed at low speeds,
decrease the value at Cn.41 in 10% decrements until the motor operates
stably.
If ripples occur during normal operation, increase the value at Cn. 42.
The values at Cn.43 and Cn.44 are used for low speed operations in 200 V
Cn.39 PMdeadBand Per
Cn.40PMdeadVolt Per
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 Cn.39 and Cn.40 by 10%
increments. Decrease the values in 10% decrements if a clanking noise
occurs at motor startup and motor stop.
Cn.45 PM Flux FF %
Sets the high-speed portion of the feed forward rate against the back-EMF
during a PM synchronous motor operation in sensorless vector control
mode. Feed forwarding enhances operation of the speed estimator.
Increase the value at Cn.45 in 10% increments to suppress motor
oscillation under load. A fault trip may occur if this value is set too high.
Cn.48 ACR P-Gain
Cn.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 trip
may occur due to interference if you set the gain values too high.
Cn.53 Torque Lmt Src
Select a source for torque limit input: Keypad, terminal block analog input
(V1 and I2), or input via network communication.
The torque limit value is used to adjust the torque reference size by limiting
the speed controller output. The reverse and regenerative torque limits
may be set for operations in the forward or reverse direction.
Sets the torque limit via the keypad.
Sets the torque limit via the analog input
terminals of the terminal block.
Sets the torque limit via the communication
terminal of the terminal block.
Sets the torque limit with the FieldBus
communication option.
Sets the torque limit with a user sequence
output. The torque reference is received via the
To Next Page
Loading...
