LSIS LSLV-S100 - Page 213

Learning Advanced Features
199
Code
Description
response rate.
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 motors.
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.
Setting
Function
0
KeyPad-1
Sets the torque limit via the keypad.
1
KeyPad-2
2
V1
Sets the torque limit via the analog input
terminals of the terminal block.
4
V2
5
I2
6
Int 485
Sets the torque limit via the
communication terminal of the terminal
block.