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US 8,134,273 B2Granted
Electrical machine with skew-running magnet pole boundaries
AssigneeSiemens Aktiengesellschaft
InventorsRolf Vollmer, Marcus Ziegler
Life of this patent
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Abstract
According to the invention, the torque ripple of electrical machines is supposed to be further reduced. For this purpose, it is provided to dispose the magnetic poles, for example, on the surface of a rotor in a plurality of sections (A1, A2) at different angles. The result are helix angles (β1, β2), which have different amounts. Also more than two different helix angles, up to a continuous course of the boundary lines (G4) between the poles, can be implemented.
Claims8
An electrical machine, comprising:
- a first component;
- a second component, which is magnetically coupled to the first component and movable in a movement direction with respect to the second component;
- and
- a magnet pole arrangement, which is formed on the first component and has poles which are aligned in the movement direction and alternate in a first magnetic field direction and in a second magnetic field direction, which is opposite to the first magnetic field direction, wherein a boundary between poles of different magnetic field directions runs corresponding to a first skew angle in a first area of the first component and corresponding to a second skew angle relative to the movement direction in a second area of the first component, wherein the first skew angle has a different magnitude than the second skew angle, and wherein the boundary runs at three different skew angles.
1 more element
Dependencies are inferred from the claim text.