121
SPX advanced – description of parameters
SPX ADVANCED APPLICATION MANUAL
SVCH0203—October 2017 www.eaton.com
Code
ID
Description
Notes
P1.9.3
1534
Load drooping removal “LoadDroopRemoval”
Linearly increased to motor nominal frequency
2 Load drooping is removed linearly from nominal frequency to zero frequency.
Load
Drooping
Freq. Out
Motor
nominal
frequency
Code
ID
Description
Notes
P1.9.4.1
637
Speed controller P gain, open loop “OL speed reg P”
Defines the P gain for the speed controlled in Open Loop control mode.
P1.9.4.2
638
Speed controller I gain, open loop “OL speed reg I”
Defines the I gain for the speed controlled in Open Loop control mode.
Code
ID
Description
Notes
P1.9.5.1
613
Speed control P gain “speed control Kp”
Gain for the speed controller in closed loop motor control operation. Gain value 100
means that the nominal torque reference is produced at the speed controller output for
the frequency error of 1Hz.
P1.9.5.2
614
Speed control I time “speed control Ti”
Sets the integral time constant for the speed controller. Increasing the I-time increases
stability but lengthens the speed response time.
Kp 30, Ti 100
Kp 30, Ti 300
5.10.1.1 Open loop settings
5.10.1.2 Closed loop speed control settings
Speed control formula:
y = Kp
u (k) = y (k − 1) + Kp [e(k) − e (k − 1) +
e (k) ]
e
�
]
1 +
T i s
1
T i
T
S