Siemens SIMOTICS S-1FT7 User Manual

Technical data and characteristic curves
6.1 Explanations
S-1FT7 synchronous motors
132 Configuration Manual, 09/2018, A5E45099423B AA
Permissible temperature range, characteristics S1
(100 K)
and S1
(60 K)
1FT7 motors can be operated up to an average winding temperature of 145 °C.
The S1
(100 K)
characteristic in the diagram "Torque characteristics of synchronous motors"
indicates the limits of the permissible temperature range for continuous operation. This
corresponds to a utilization according to thermal class F (155 °C).
A lower thermal class can be necessary if, for example,
● the enclosure temperature must be below 90 °C for safety reasons
● the motor temperature rise has a negative impact on the machine
In this case, choose the S1
(60 K)
characteristic. The motor now corresponds to thermal class
B (130 °C).
NOTICE
Motor damage caused by overheating
Continuous operation outside the permissible temperature range can result in the motor
overheating and cause damage to the motor.
• Operate the motor continuously only within the S1(100 K) characteristic.
Periodic intermittent duty, characteristics S3 25 %, S3 40 %, S3 60 % and M
max
In periodic intermittent duty, you can apply a higher load to the motor, depending on the ON
duration, see also Chapter "Procedure when engineering (Page 108)".
Review the S3 characteristics with the 25 %, 40 % and 60 % ON durations.
The cycle time is always 10 minutes. The overtemperature is 100 K.
The exception are small motors, for which a cycle time of one minute is specified and noted
in the characteristic curves.
A transient, high overload capacity up to characteristic M
max
is available over the complete
speed range.
Recommended Motor Module
A Motor Module is recommended in Chapter "Motor overview / assignment of Motor Modules
/ power cables (Page 142)" for each motor in accordance with its stall current. The maximum
achievable torque is shown in the characteristic M
max conv
.
● When configuring intermittent or overload operation, check whether a larger Motor
Module is required to provide the necessary peak current.

Siemens SIMOTICS S-1FT7 Specifications

General

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