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(11) | EP 4 279 630 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | METHOD FOR MAKING A STRUCTURED MAGNETIC MATERIAL WITH INTEGRATED PARTICLE INSULATION |
| (57) A system for forming a soft magnetic bulk material of a motor stator from a magnetic
material and a source of insulating material, the system comprising: a support; a
heating device; a deposition device; and an indexing mask subsystem. The support is
configured to support the soft magnetic bulk material of the motor stator. The heating
device is for heating the magnetic material to form particles having a softened state.
The deposition device is for depositing successive layers of particles of the magnetic
material in the softened state on the support. The indexing mask subsystem is configured
as a first negative of an inner shape of the motor stator and a second negative of
an outer shape of the motor stator. The indexing mask subsystem is located between
the deposition device and the support and indexed relative to the support upon deposition
of the successive layers to selectively block the successive layers of particles of
the magnetic material in the softened state from being deposited on the support, thus
forming the soft magnetic bulk material of the motor stator as the inner shape of
the motor stator and the outer shape of the motor stator on the support. The soft
magnetic bulk material has a plurality of adhered domains of magnetic material, wherein
substantially all of the domains of magnetic material are separated by a predetermined
layer of high resistivity insulating material.
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