Electrodynamic device
AssigneeU.S. Philips Corporation
InventorEvert J. Van Loenen
Life of this patent
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Abstract
An electrodynamic device such as an electric motor has a stator (16) comprising a substrate (41) in the form of a sheet or foil carrying a plurality of windings (U.sub.1 -U.sub.3, V.sub.1 -V.sub.3, W.sub.1 -W.sub.3) comprising spiral coils (43, 45) on its upper and its lower side connected in series with one another, which stator has a number of phases (U, V, W) each comprising at least one winding. The device in accordance with the invention may comprise one or a plurality of such substrates (41), but each substrate always carries all the phases (U, V, W) present.
Claims6
An electrodynamic device comprising:
- a movable permanent-magnet rotor (14) and
- an electromagnetic stator (16) comprising:
- a substrate (41) having a first side and an opposite second side,
- a plurality of windings (U.sub.1 -U.sub.3, V.sub.1 -V.sub.3, W.sub.1 -W.sub.3), each one of said plurality of windings comprising a spiral first coil (43) which is situated on the first side of the substrate and a spiral second coil (45) which is situated on the opposite second side of the substrate, said first and second coils being electrically connected in series with one another via an interconnection through said substrate, and
- a plurality of phases (U, V, W) each comprising at least one said winding and having ends,
- characterized in that the substrate carries all the phases (U, V, W).
An electrodynamic device, comprising:
- a movable permanent-magnet rotor (14) and
- an electromagnetic stator (16) comprising:
- a substrate (41) having a first side and an opposite second side,
- a plurality of windings (U.sub.1 -U.sub.3, V.sub.1 -V.sub.3, W.sub.1 -W.sub.3) comprising spiral first and second coils (43, 45) which are electrically connected in series with one another via interconnections and which are situated, respectively, on the first and the opposite second side of the substrate, and
- a plurality of phases (U, V, W) each comprising at least one said winding and having ends,
- characterized in that;
- the substrate carries all the phases (U, V, W),
- the windings (U.sub.1 -U.sub.3, V.sub.1 -V.sub.3, W.sub.1 -W.sub.3) comprise electrically conductive tracks on the substrate (41),
- said interconnections comprise at least one electrically conductive track (49A,B),
- each said at least one electrically conductive track of an interconnection is situated on the first side of the substrate (41) for a first part and on the second side of said substrate for a second part,
- the rotor is rotatable about an axis,
- the coils (43, 45) are arranged uniformly around said axis in a regular pattern,
- the first and second coils (43, 45) substantially coincide in a projection parallel to said axis,
- each said at least one electrically conductive track of an interconnection (49A, 49B) is situated on the first side of said substrate for one half and on the second side of said substrate for another half, and
- said at least one electrically conductive track of said interconnections form regular patterns which are identical in plan views of the first and the second side of the substrate (41).
Dependencies are inferred from the claim text.