Rotor for an electrical machine

摘要

The present application relates to a rotor (1) for an electrical machine. The rotor (1) comprises at least one substantially cylindrically shaped ferromagnetic base element (2). Said ferromagnetic base element (2) includes a multitude of posts (3, 3.1, 3.2) radially extending therefrom, each of said posts (3, 3.1, 3.2) being bordered by at least a first lateral surface (4) and a second lateral surface (5), wherein recesses (7) are defined between each pair of neighbouring posts (3, 3.1, 3.2). One ferromagnetic intermediate member (13) is arranged in each recess (7) between each pair of posts (3, 3.1, 3.2). Each ferromagnetic intermediate member (13) is affixed to the first lateral surface (4) of a first post (3.1) and to the second lateral surface (5) of a second post (3.2) of each pair of posts (3, 3.1, 3.2) by means of at least one permanent magnet (6, 6.1, 6.2), respectively, said permanent magnets (6, 6.1, 6.2) being each oriented such that the same pole faces said ferromagnetic intermediate members (13). The first lateral surface (4) and said second lateral surface (5) are shaped such that the distance between the first lateral surface (4) and the second lateral surface (5) decreases with increasing distance from the rotation axis (11) of the rotor (1) in a radial direction and an inner surface (15) of each ferromagnetic intermediate member (13) is facing towards the rotor axis (11) and is covered with at least one additional permanent magnet (20.1, 20.2, 20.3). At least one additional permanent magnet (20.1, 20.2, 20.3) is arranged such that the pole oriented towards the ferromagnetic intermediate members (13) and is the same pole as the pole of the permanent magnets (6, 6.1, 6.2) oriented towards said ferromagnetic intermediate members (13).

主权项

1. Rotor for an electrical machine comprising at least one substantially cylindrically shaped ferromagnetic base element (2), said ferromagnetic base element (2) including a multitude of posts (3, 3.1, 3.2) radially extending therefrom, each of said posts (3, 3.1, 3.2) being bordered by at least a first lateral surface (4) and a second lateral surface (5), wherein recesses (7) are defined between each pair of neighbouring posts (3, 3.1, 3.2), one ferromagnetic intermediate member (13) is arranged in each recess (7) between each pair of posts (3, 3.1, 3.2), characterized in that each ferromagnetic intermediate member (13) is affixed to the first lateral surface (4) of a first post (3.1) and to the second lateral surface (5) of a second post (3.2) of each pair of posts (3, 3.1, 3.2) by means of at least one permanent magnet (6, 6.1, 6.2), respectively, said permanent magnets (6, 6.1, 6.2) being each oriented such that the same pole faces said ferromagnetic intermediate members (13) wherein said first lateral surface (4) and said second lateral surface (5) are shaped such that the distance between the first lateral surface (4) and the second lateral surface (5) decreases with increasing distance from the rotation axis (11) of the rotor (1) in a radial direction and in that an inner surface (15) of each ferromagnetic intermediate member (13) facing towards the rotor axis (11) is covered with at least one additional permanent magnet (20.1, 20.2, 20.3), said at least one additional permanent magnet (20.1, 20.2, 20.3) being arranged such that the pole oriented towards the ferromagnetic intermediate members (13) is the same pole as the pole of the permanent magnets (6, 6.1, 6.2) oriented towards said ferromagnetic intermediate members (13).