Permanent-magnet electric motor for circulation pumps of heating systems
AssigneeAskoll Holding S.r.l.
InventorElio Marioni
Life of this patent
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Abstract
A permanent-magnet electric motor for circulation pumps of heating systems, comprising a stator (10) composed of a pack of metallic laminations (11) which form pole shoes (12) to which electrical windings (14) are coupled. A permanent-magnet rotor is arranged in a chamber which is separated with a watertight seal from the stator (10). The chamber that contains the rotor has a cross-section which is shaped so as to duplicate the contour of the pole shoes (12) in regions affected by the pole shoes (12) and so as to form wider portions in regions that are not affected by the pole shoes (12).
Claims11
A permanent-magnet electric motor for circulation pumps of heating systems, comprising:
- a stator composed of a pack of metallic laminations which form pole shoes to which electrical windings are coupled;
- a permanent-magnet rotor, arranged in a chamber separated with a watertight seal and electrically insulated from the stator;
- characterized in that said chamber that contains the rotor has a cross-section which duplicates the contour of the pole shoes in regions of said chamber affected by said pole shoes and is shaped so as to form wider portions in regions that are not affected by said pole shoes.
The motor according to one or more of the preceding claims, characterized in that said metal lamination pack that forms the pole shoes and the corresponding electric windings are embedded and insulated in a plastic enclosure which is molded in place.
The motor according to one or more of the preceding claims, characterized in that said pack of laminations and the spools with the windings are embedded in an epoxy resin inside a plastic enclosure which integrates said rotor chamber.
The motor according to one or more of the preceding claims, wherein said windings are placed on four corresponding spools which are coupled to said pole shoes and are arranged in a cross-shaped configuration, characterized in that rotor-side ends of said spools have a raised portion at one side and a complementary recess at an other side for coupling and mutual positioning.
Dependencies are inferred from the claim text.