Disposal and recycling
7.3 Disposing of permanent magnets
A5E01083943A AB
Siemens AG Operating Instructions 2.02 1FW4
89
NOTICE
The hazards of released magnetic fields
The permanent magnet rotor may only be removed by the manufacturer.
WARNING
Damage caused by strong magnetic fields
Magnetic leakage fields, which come from an open or disassembled permanent magnet
synchronous motor or from an individual rotor of such a motor, can disrupt or damage other
electric or electromagnetic devices, e.g., pacemakers or credit cards.
Demagnetizing the rotors
Disposal companies specialized in demagnetization use special disposal furnaces. The
insides of the disposal furnace consist of non-magnetic material. The rotors are put in the
furnace in a solid, heat-resistant container made of non-magnetic material and left in the
furnace during the entire demagnetization procedure. Demagnetization is achieved by
heating the rotor in the furnace until the permanent magnets have reached a temperature of
+350°C.
NOTICE
Preventing emissions
Escaping exhaust must be collected and rendered harmless without damaging the
environment.
[ID 826.01]
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