Siemens SINAMICS G120C User Manual

Function description
The converter has di󹪜erent U/f characteristics.
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① The voltage boost of the characteristic improves speed control at low speeds
② With the 󹪞ux current control (FCC), the converter compensates for the voltage drop in the stator
resistor of the motor
Figure8-47 Characteristics of U/f control
With increasing speed or output frequency, the converter increases its output voltage U. The
maximum possible output voltage of the converter depends on the line voltage.
The converter can increase the output frequency even at the maximum output voltage. The
motor is then operated with 󹪝eld weakening.
The value of the output voltage at the rated motor frequency p0310 also depends on the
following variables:
• Ratio between the converter size and the motor size
• Line voltage
Advanced commissioning
8.20Motor control
SINAMICS G120C Converters
Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK 301

Siemens SINAMICS G120C Specifications

General

Communication Interfaces	PROFINET, PROFIBUS, USS, Modbus RTU
Protection Class	IP20
Ambient Temperature	-10°C to +50°C
Storage Temperature	-40°C to +70°C
Power Range	0.55 kW to 132 kW
Voltage Range	380 V to 480 V
Output Voltage	0 V to Supply Voltage
Frequency Range	0 Hz to rated output frequency
Control Modes	Vector control with encoder
Protection	Overload, overvoltage, undervoltage, short circuit, ground fault
Relative Humidity	5% to 95%, non-condensing
Altitude	Up to 2000 m without derating