Siemens SINAMICS G150 Operating Instructions Manual page 397

• p1470
• p1472
• r1482
• r1508
• p1960
Examples of speed controller settings
A few examples of speed controller settings with vector control without encoders (p1300 =
20) are provided below. These should not be considered to be generally valid and must be
checked in terms of the control response required.
● Fans (large centrifugal masses) and pumps
● Stone mills, separators (large centrifugal masses)
● Kneader drives
● When operating with encoder (p1300 = 21)
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A
Speed controller encoderless operation P gain
Speed controller encoderless operation integral time
CO: Torque output I speed controller
CO: Torque setpoint before supplementary torque
Speed controller optimization selection
Kp (p1470) = 2 ... 10
Tn (p1472) = 250 ... 500 ms
The Kp = 2 and Tn = 500 ms settings result in asymptotic approximation of the actual
speed to the setpoint speed after a setpoint step change. During many simple control
procedures, this is satisfactory for pumps and fans.
Kp (p1470) = 12 ... 20
Tn (p1472) = 500 ... 1000 ms
Kp (p1470) = 10
Tn (p1472) = 200 ... 400 ms
Note
We recommend checking the effective speed control gain (r1468) during operation. If this
value changes during operation, the Kp adaptation is being used (p1400.5 = 1). Kp
adaptation can if necessary be deactivated or its behavior changed.
A smoothing value for the actual speed value (p1442) = 5 ... 20 ms ensures quieter
operations for motors with gear units.
Setpoint channel and closed-loop control
7.4 Vector speed/torque control with/without encoder
395