Back to results
US 6,150,747 AGranted
Composite stator and rotor for an electric motor
AssigneeElectric Boat Corporation
InventorsMitchell D. Smith, Pieter Van Dine
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeElectric Boat Corporation
InventorsMitchell D. Smith, Pieter Van Dine
Estimating the term…
In the embodiments described in the specification, a stator for an electric motor has an outer ring member made of resin material and supported from a frame by stator caps and a flanged inner composite ring member made of resin material which receives a steel band. Laminations and coil windings are mounted inside the steel band and an outer wrap of resin material encapsulates the steel band, laminations and coil windings. A rotor arrangement includes a steel hub surrounded by a disk-shaped member made of resin material and having inner and outer rings connected by radial arms. A non-ferromagnetic steel band surrounds the peripheral surface of the disk-shaped member and laminations and magnets or coil windings are positioned on the band and are encapsulated by an outer wrap of resin material.
A composite stator arrangement for an electric motor comprising an outer ring member containing a resin material and having a cylindrical opening, a motor frame member containing resin material surrounding the outer ring member, circular stator caps disposed on opposite sides of the outer ring member for clamping the outer ring member to the motor frame member, a toroidal coil and lamination assembly comprising a plurality of coil windings mounted on core laminations distributed about the periphery of the cylindrical opening, a flanged inner ring member containing resin material in which the coil and lamination assembly is mounted, a steel band surrounding the coil and lamination assembly and an outer wrap containing resin material and encapsulating the coil and lamination assembly.
A composite rotor arrangement comprising a central hub member having an axial passage for receipt of a rotor shaft, a disk-shaped member containing resin material mounted on the central hub member having an outer peripheral surface, an array of laminations containing magnet units mounted on the outer peripheral surface of the disk-shaped member, a non-ferromagnetic steel band on an outer peripheral surface of the disc-shaped member beneath the array of laminations and an outer wrap containing resin material and encapsulating the array of laminations and magnet units.
An electric motor comprising a stator arrangement including an outer ring member containing resin material and having a cylindrical opening, a toroidal coil and lamination assembly mounted within the cylindrical opening, a flanged inner ring member containing resin material in which the toroidal coil and the lamination assembly is mounted and an outer stator wrap enclosing the coil and the lamination assembly, and a composite rotor arrangement rotatably supported within the opening of the composite stator arrangement comprising a hub, a disk-shaped member mounted on the hub containing a resin material, a lamination assembly containing magnet units mounted on the periphery of the disk-shaped member, a non-ferromagnetic steel band on the outer peripheral surface of the disc-shaped member beneath the lamination assembly and an outer rotor wrap containing resin material and encapsulating the lamination assembly containing magnetic units.
Dependencies are inferred from the claim text.