Siemens SIMOTICS S-1FT7 User Manual

Technical data and characteristic curves
6.1 Explanations
S-1FT7 synchronous motors
134 Configuration Manual, 09/2018, A5E45099423B AA
M
Volt lim
Voltage limit characteristic without field weakening
1
Voltage limit characteristic with field weakening
A
Without field weakening
B
Field weakening range
Figure 6-2 Shape of the voltage limiting characteristic with/without field weakening
The characteristics for each winding version are shown in a separate data sheet.
The torque-speed diagrams for different converter output voltages are assigned to each data
sheet:
Table 6- 1 Converter output voltages
Diagram
Converter output
voltage V
mot
Infeed module
Line supply voltage
Upper diagram
380 V
SINAMICS SLM
400 V
425 V
SINAMICS ALM
400 V
Lower diagram 460 V SINAMICS SLM 480 V
510 V
SINAMICS ALM
480 V
For different converter output voltages, the voltage limiting characteristic curve must be
offset accordingly. See "Explanations (Page 131)"
Torque limit when operating on a SINAMICS S120 drive system without field weakening
It is possible to deactivate the field weakening function with the SINAMICS S120 drive
system. This therefore reduces the operating range that is available.
In the diagram "Torque characteristics of synchronous motors" below, the area without field
weakening is marked with "A".
The voltage induced in the motor winding increases as the speed increases.

Siemens SIMOTICS S-1FT7 Specifications

General

Brand	Siemens
Model	SIMOTICS S-1FT7
Category	Engine
Language	English