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Rotor sleeves
Note
Built-in motors without rotor sleeve:
The force is transmitted without any play through a friction-locked connection. Larger
shaft diameter diameters are achieved due to the fact that there is no rotor sleeve.
Generally, it is not possible to release the group (rotor and stator) using the version
without sleeve.
Built-in motors with rotor sleeve:
The rotor is located on an inner sleeve with a step interference fit. The press fit can be
released using pressurized oil without this influencing the joint surfaces.
The spindle manufacturer mounts the rotor on the spindle using a thermal shrinking
procedure.
NOTICE
Damage to the rotor permanent magnets due to excessively high temperatures
For IPM rotors, if the temperature exceeds 150 °C (140 °C for APM rotors), then the
permanent magnets in the rotor will be irreversibly demagnetized.
• Prevent the rotor from being heated up to above 150 °C for IPM rotors (140 °C for
• Inductive heating of the rotor is not permissible.
To ensure torque transmission without any play, in the area of the interference fit, the
spindle must be machined with the specified dimensions and tolerances. Additional
information is provided in the dimension drawing in Chapter "Dimension drawings
(Page 133)".
3.2
Degree of protection
Note
Selecting the degree of protection
The spindle manufacturer is responsible for selecting the degree of protection, its
implementation and its verification regarding suitability.
• Protect the motor components against moisture, foreign bodies and contact.
When delivered, the stator and the rotor have degree of protection IP00 in accordance
with EN 60034-5.
The spindle manufacturer defines the final degree of protection as a result of the
mechanical design of the spindle housing.
Recommended degree of protection: at least IP54
SIMOTICS M-1FE1 synchronous built-in motors
Configuration Manual, 09/2019, A5E47872980B AA
APM rotors) by checking the rotor temperature using a temperature-reactive dye or
a temperature measuring device.
Mechanical properties
3.2 Degree of protection
47
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