US 2025/0167609 A1 · MECHANICAL RETENTION OF ROTOR MAGNETS

Abstract

A rotor for an electric machine includes a plurality of layers and magnets. The plurality of layers form a stack of layers with each layer defining a plurality of magnet openings therethrough. The plurality of magnet openings align to form a plurality of magnet channels that extend through the rotor. Each magnet opening is defined by an inner radial wall and an outer radial wall. The inner radial wall of at least one of the magnet openings of each layer includes an inner retention tab that extends towards the respective outer radial wall. Each magnet is received in a respective magnet channel and engaged with the inner retention tabs of multiple layers such that the magnet is mechanically retained in the respective magnet channel.

Claims20

Dependent claims

A rotor for an electric machine, the rotor comprising:

a plurality of layers forming a stack of layers, each layer of the plurality of layers defining a plurality of magnet openings therethrough, the plurality of magnet openings aligned to form a plurality of magnet channels that extend through the rotor, each magnet opening defined by an inner radial wall and an outer radial wall, the inner radial wall of at least one of the magnet openings of each layer including an inner retention tab that extends towards the respective outer radial wall;
and
a magnet received in each magnet channel, each magnet engaged with the inner retention tabs of multiple layers such that the magnet is mechanically retained in the respective magnet channel.

A rotor for an electric machine, the rotor comprising:

a plurality of layers forming a stack of layers, each layer of the stack of layers defining a plurality of magnet openings disposed radially about the respective layer, the magnet openings of each layer aligned with the magnet openings of the other layers of the plurality of layers to define a plurality of magnet channels that extend through the rotor, each magnet opening defined by an inner radial wall and an outer radial wall opposite the inner radial wall, the plurality of magnet openings including a first magnet opening, the inner radial wall of the first magnet opening including a retention tab that extends towards the outer radial wall;
and
a magnet received in a respective magnet channel, the magnet engaging retention tabs of respective layers such the magnet is mechanically retained in the respective magnet channel.

Dependencies are inferred from the claim text.

Mechanical retention of rotor magnets

Life of this patent

Mechanical retention of rotor magnets

Life of this patent

Abstract

Claims20