Basler Electric DECS-250N - Manual (Page 121)

9440500990 Rev D 105
DECS-250N Stability Tuning
The derivative gain (Kd) C is multiplied by the derivative of the error between the current setpoint and the
actual field current value. Increasing Kd reduces ringing in the transient response.
Additional FCR stability settings remove the noise effect on numerical differentiation (derivative time
constant Td)
D and set the voltage regulator gain level of the PID algorithm (Ka) E with recommended gain
calculation F .
FVR Mode Stability Settings
The DECS-250N bases its field voltage output upon the following settings.
The proportional gain (Kp) G is multiplied by the error between the field voltage setpoint and the actual field
voltage value. Decreasing Kp reduces overshoot in the transient response. Increasing Kp speeds the
transient response.
The integral gain (Ki) H is multiplied by the integral of the error between the voltage setpoint and the actual
field voltage value. Increasing Ki reduces the time to reach a steady state.
The derivative gain (Kd) I is multiplied by the derivative of the error between the voltage setpoint and the
actual field voltage value. Increasing Kd reduces ringing in the transient response.
Additional FVR stability settings remove the noise effect on numerical differentiation (derivative time
constant Td)
J and set the voltage regulator gain level of the PID algorithm (Ka) K with recommended gain
calculation L .
Figure 101. FCR and FVR Gain Settings
A Kp – Proportional Gain: Adjustable from 0 to 1,000 in 0.001 increments.
B Ki – Integral Gain: Adjustable from 0 to 1,000 in 0.001 increments.
C Kd – Derivative Gain: Adjustable from 0 to 1,000 in 0.001 increments.
D Td – Derivative Time Constant: Adjustable from 0 to 1,000 in 0.01 increments.
E Ka –Voltage Regulator Gain: Adjustable from 0 to 1 in 0.001 increments.
F Kp – Proportional Gain: Adjustable from 0 to 1,000 in 0.1 increments.
G Ki – Integral Gain: Adjustable from 0 to 1,000 in 0.1 increments.
H Kd – Derivative Gain: Adjustable from 0 to 1,000 in 0.1 increments.
I Td – Derivative Time Constant: Adjustable from 0 to 1,000 in 0.1 increments.
J Ka –Voltage Regulator Gain: Adjustable from 0 to 1 in 0.001 increments.
K FCR Recommended Ka: Recommended Ka based on calculation using no load field voltage and
operating power input voltage.
L FVR Recommended Ka: Recommended Ka based on calculation using no load field voltage and
operating power input voltage.