Siemens SIMOTICS T-1FW68, Configuration Manual

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Description of the motor
2.3 Technical features and ambient conditions
1FW68 radial segment motors
Configuration Manual, 08/2021, A5E51132930B AA
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2.3.2 Danger from strong magnetic fields
Occurrence of magnetic fields
Motor components with permanent magnets generate very strong magnetic fields. In the
no-current condition, the magnetic field strength of the motors comes exclusively from
the magnetic fields of components equipped with permanent magnets. Additional
electromagnetic fields occur in operation.
Components with permanent magnets
For the segment motors described in this manual, the permanent magnets are located in
the rotor segments.
Figure 2-3 Rotor segment
Figure 2-4 Schematic representation of the static magnetic field of a rotor segment as a
function of the distance