Electronically commutated DC motor for a liquid pump

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United States of America Patent

PATENT NO 8920143
APP PUB NO 20120045351A1





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An electronically commutated DC motor for a liquid pump, comprising a pump housing, a suction connection and a pressure connection, a substantially disk-shaped pump rotor mounted rotatably in the pump housing, the rotor comprising an impeller having a plurality of pump vanes and a permanent magnet, a partition separating a pump space from a dry space, wherein the partition is disposed in an axial gap between the pump rotor and a plurality of axially parallel oriented stator poles of the DC motor, which are each provided with an insulating body and a stator winding, the stator poles adjoin a stator yoke, which is connected to a metallic heat-conducting body, and the stator containing the stator poles, the stator windings, the stator yoke and the heat-conducting body is disposed in a motor housing made of plastic material. By providing that the stator is surrounded by a flexible foil, and at least a large part of the foil is disposed inside the motor housing radially around the stator windings, a simple solution ensures good shielding against interference in an existing electronically commutated DC motor, without requiring modifications to the existing design.

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Patent Owner(s)

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International Classification(s)


Inventor Name Address # of filed Patents Total Citations
Ihle, Olai Eckental, DE 12 93
Kellermann, Helmut Langenzenn, DE 8 9
Stolpe, Thomas Eckental, DE 3 51
Walter, Gerhard Fürth, DE 16 174
Weiske, Klaus Nürnberg, DE 12 17

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