Abstract: A bearing adjusts an angle of attack of a rotor blade of a wind turbine according and includes first and second bearing rings that are rotatable relative to each other. The first bearing ring includes, as a slider or translator of a linear motor, a plurality of magnetic field sources disposed adjacently around at least a part of its circumference. The magnetic field sources are disposed such that each two adjacently disposed magnetic field sources generate a magnetic field with alternating polarity. The second bearing ring includes, as a stator of the linear motor, a group of at least two coils disposed adjacently around at least part of its circumference. A wind turbine includes a rotor coupled to at least one rotor blade via such a bearing, which enables the angle of attack of the rotor blade to be adjusted during operation.

Abstract: A roller body for a roller bearing includes at least one cavity extending from an end face of the roller body, at least one retaining element is disposed in the cavity, and at least one sensor is disposed in the cavity, such as in or on the retaining element. The sensor is at least partially surrounded by an elastic material in a protective manner.