Siemens SIMOTICS S-1FT7 User Manual

S-1FT7 synchronous motors
Configuration Manual, 09/2018, A5E45099423B AA
131
Technical data and characteristic curves
6
6.1
Explanations
Permissible operating range
The permissible operating range is limited by thermal, mechanical, and electromagnetic
boundaries. The data in this documentation apply to the following temperatures:
● For naturally cooled motors: up to 40 °C ambient temperature
● For water-cooled motors: up to 30 °C coolant inlet temperature
The motor heats up due to the losses generated in the motor (current-dependent losses, no-
load losses, friction losses).
The utilization of the motor depends on the cooling method (naturally cooled, forced
ventilation, liquid-cooled).
To maintain the temperature limits, the permissible torque – starting from static torque M0 –
decreases as the speed increases.
The characteristics below show the limits of the permissible temperature range.
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 6-1 Torque characteristics of synchronous motors

Siemens SIMOTICS S-1FT7 Specifications

General

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