Abstract: A method for operating a machine located in choppy waters, in particular a wave energy converter, for converting energy from a wave movement of a fluid into another form of energy includes determining measurement variables at a first, relatively early time, and calculating a variable characterizing a wave movement expected at a second, later time on the basis of the determined measurement variables.

Abstract: A wave energy converter comprises a rotor, which is designed to convert a wave movement of a body of water, in which the wave energy converter is arranged, into a rotational movement of the rotor, wherein a mean density of at least one rotating component of the rotor can be adjusted and/or is lower than the mean density of the fluid surrounding the rotor in the body of water. The disclosure likewise relates to a corresponding control device and an operating method.

Abstract: A rotating wave energy machine includes at least one rotor that revolves in a synchronous manner for utilizing an orbital flow of an undulating body of water that circulates over the rotor. An output power is tapped at a rotor shaft and the power (in the power flow) is converted by at least one lift device of the rotor. A cross-section of the lift device includes at least one curve or angle that is shaped depending on a curve of a total flow. The at least one angle or curve is configured such that the influence of the relative flow on the total flow is taken into account. When the rotating wave energy machine is operational, the relative flow is superposed on the circulating orbital flow that acts on the lift device from outside, and a total flow is produced which is curved about the rotor shaft.

Abstract: A wave energy converter comprises a rotor, which is designed to convert a wave movement of a body of water, in which the wave energy converter is arranged, into a rotational movement of the rotor, wherein a mean density of at least one rotating component of the rotor can be adjusted and/or is lower than the mean density of the fluid surrounding the rotor in the body of water. The disclosure likewise relates to a corresponding control device and an operating method.

Abstract: A method for operating a wave energy converter for converting energy from a wave movement of a fluid into a different form of energy. The wave energy converter including at least one rotor and at least one energy converter coupled to the at least one rotor. A first torque acting on the at least one rotor is generated by the movement of the waves and a second torque acting on the at least one rotor is generated by the at least one energy converter. A desired effective force acting perpendicular to an axis of rotation of the at least one rotor is set by setting the first and/or second torque.