Motors; 1Lg4/1Lg6 And 1La8 Self-Cooled Asynchronous Motors; 1Ph7/ 1Pl6 Compact Asynchronous Motors; 1Fw3 / 1Fw4 Three-Phase Synchronous Motors (High-Torque Motors With Permanent Magnets) - Siemens SINAMICS G130 Engineering Manual

Motors

Engineering Information
Motors
We generally recommend the use of the successful Siemens standard asynchronous motors of types 1LA and 1LG
for standard applications. For more detailed information about motor series 1LG4/1LG6 and 1LA8, please refer to
catalog D81.1.

1LG4/1LG6 and 1LA8 self-cooled asynchronous motors

1LG4/1LG6 and 1LA8 asynchronous motors are self-cooled motors with IP55 degree of protection. They are
designed with an internal and an external cooling system. Both the internal and external fans (which are fitted in each
motor) are permanently coupled to the shaft. The cooling effect is therefore directly dependent on the motor speed.
Internal and external cooling circuits on self-cooled motors of type 1LG4/1LG6 and 1LA8

1PH7/ 1PL6 compact asynchronous motors

In addition to the 1LA and 1LG motors, it is also possible to use 1PH7/1PL6 compact asynchronous motors in the
voltage range up to 415 V. These are recommended for applications at
•
wide speed ranges with high maximum speeds
•
limited mounting space.
1PH7/1PL6 motors with the same rated power are on average 1 to 2 shaft heights smaller than comparable standard
asynchronous motors.
With converter chassis units SINAMICS G130 and converter cabinet units SINAMICS G150 it is only possible to use
the Sensor Module SMC30. Therefore, only TTL/HTL incremental encoders can be used when these motors are
operated by SINAMICS G130 and G150.

1FW3 / 1FW4 three-phase synchronous motors (high-torque motors with permanent magnets)

In addition to the three-phase asynchronous motors, three-phase synchronous motors of types 1FW3 and 1FW4 are
also available as high-torque motors with permanent magnets for converter-fed operation on SINAMICS units. These
are recommended for applications with
•
high torques
•
low speeds
•
low-maintenance operation
which require
•
a compact design
•
high availability
and
•
high efficiency
•
rugged design
•
low noise generation
SINAMICS Engineering Manual – May 2008
320/396
© Siemens AG