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Functions
14.10 Closed-loop drive control
Description of function
In the following circumstances, the motor cannot accelerate to its speed setpoint after starting:
• Load moment of inertia is too high
• Load torque is too large
• Ramp-up time p1120 is too short
To improve the startup behavior of the motor, the converter boosts the voltage at low speeds.
Figure 14-81
At p1610 = 0%, the motor starts with the current for an unloaded motor.
At p1610 = 100%, the motor starts with a current corresponding to the rated torque.
During acceleration and deceleration, the converter adds p1611 to p1610 and converts the
resulting total torque into a current setpoint.
Parameters
The following list contains the parameters of the "Optimize motor startup for Standard Drive
Control operating mode" function.
Number
r0071
p0310[0...n]
p0320[0...n]
p1401[0...n].0...30
p1610[0...n]
p1611[0...n]
p1616[0...n]
r1751.0...22
468
Voltage boost
Name
Maximum output voltage
Rated motor frequency
Motor rated magnetizing current/short-circuit current
Flux control configuration
Starting torque static (without encoder)
Acceleration starting torque (encoderless)
Current setpoint smoothing time
Motor model status
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB
Unit
[Vrms]
[Hz]
[Arms]
[%]
[%]
[ms]
SINAMICS G220 converter
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