Elastic insulating material element for wedging a winding, in particular the stator winding, of an electric machine
AssigneeABB Research Ltd.
InventorsThomas Baumann, Reinhard Joho, Jörg Oesterheld
Life of this patent
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Abstract
In an elastic insulating material element for wedging a winding, in particular the stator winding, of an electric machine in the slots provided for this purpose in a laminated body, good mechanical and, at the same time, electric properties are achieved in that the insulating material element (10) has a striplike metal spring core (11) which is surrounded on all sides by a casing (12) made of an insulating material.
Claims25
An elastic insulating material element for wedging a winding of an electric machine in slots provided in a laminated body,
- wherein the insulating material element comprises a striplike metal spring core which is embedded within a casing made of an insulating material,
- wherein the insulating material completely surrounds the metal spring core and adheres to the metal spring core, and the insulating material and the metal spring core form an integral unit,
- wherein the insulating material element is nonmagnetic, and
- wherein the metal spring core comprises means for limiting eddy currents induced in the metal spring core, the means for limiting induced eddy currents comprising slitlike incisions which, arranged so as to be distributed in the longitudinal direction of the metal spring core, project into the interior of said metal spring core, in each case starting from longitudinal edges of the metal spring core.
An elastic insulating material element for wedging a winding of an electric machine in slots provided in a laminated body,
- wherein the insulating material element comprises a striplike metal spring core which is embedded within a casing made of an insulating material consisting of a fiber reinforced plastic,
- wherein the insulating material completely surrounds the metal spring core and adheres to the metal spring core, and the insulating material and the metal spring core form an integral unit, and
- wherein the metal spring core is provided with bores, arranged in a distributed manner, and the insulating material of the casing fills the bores and thereby improves a mechanical connection between the metal spring core and the casing.
An elastic insulating material element for wedging a winding of an electric machine in slots provided in a laminated body,
- wherein the insulating material element comprises a striplike metal spring core which is embedded within a casing made of an insulating material,
- wherein the insulating material completely surrounds the metal spring core and adheres to the metal spring core, and the insulating material and the metal spring core form an integral unit, and
- wherein the insulating material element is designed as a corrugated spring and the metal spring core is designed as a strip corrugated in meander-like manner, and the meander-like corrugation forms an angle of less than 90° with the longitudinal direction of the corrugated spring.
Dependencies are inferred from the claim text.