Abstract: In a planetary gear arrangement with a planetary gear which includes a rotating part and a non-rotating part, and with a sensor module for sensing properties of the planetary gear, the sensor module includes a sensor as well as a first sending/receiving unit and a second sending/receiving unit, wherein the sensor and the first sending/receiving unit are coupled and arranged at the rotating part, and wherein the second sending/receiving unit is arranged at the non-rotating part, wherein the first sending/receiving unit and the second sending/receiving unit are configured for being inductively coupled, wherein the first sending/receiving unit includes an energy storage, wherein the energy storage is configured for being charged during each turn of the rotating part for powering the sensor via the first sending/receiving unit in order to perform measurements.

Abstract: In a planetary gear arrangement with a planetary gear which includes a rotating part and a non-rotating part, and with a sensor module for sensing properties of the planetary gear, the sensor module includes a sensor as well as a first sending/receiving unit and a second sending/receiving unit, wherein the sensor and the first sending/receiving unit are coupled and arranged at the rotating part, and wherein the second sending/receiving unit is arranged at the non-rotating part, wherein the first sending/receiving unit and the second sending/receiving unit are configured for being inductively coupled, wherein the first sending/receiving unit includes an energy storage, wherein the energy storage is configured for being charged during each turn of the rotating part for powering the sensor via the first sending/receiving unit in order to perform measurements.

Abstract: The invention relates to a method for performing an oil change on a wind power plant, comprising the steps of rotating the rotor (3) to a maintenance position, subsequently draining the oil out of a first variable-speed gearbox (6), filling the first variable-speed gearbox (6) with fresh oil, draining the oil out of a second variable-speed gearbox (6?) that is oriented differently than the first gearbox, and filling the second drive device (6?) with fresh oil. The variable-speed gearboxes each comprise a sump (63) having a first outlet opening (65) and a mirrored sump (64) on the opposite end of the housing thereof having a second outlet opening (66). Thus, the rotor (3) does not need to be rotated further during the oil change. The oil change can be performed simultaneously on several or all variable-speed gearboxes, reducing time and personnel expenses. The invention further relates to a correspondingly designed drive device and to an oil changing device.

Abstract: The invention relates to a method for performing an oil change on a wind power plant, comprising the steps of rotating the rotor (3) to a maintenance position, subsequently draining the oil out of a first variable-speed gearbox (6), filling the first variable-speed gearbox (6) with fresh oil, draining the oil out of a second variable-speed gearbox (6?) that is oriented differently than the first gearbox, and filling the second drive device (6?) with fresh oil. The variable-speed gearboxes each comprise a sump (63) having a first outlet opening (65) and a mirrored sump (64) on the opposite end of the housing thereof having a second outlet opening (66). Thus, the rotor (3) does not need to be rotated further during the oil change. The oil change can be performed simultaneously on several or all variable-speed gearboxes, reducing time and personnel expenses. The invention further relates to a correspondingly designed drive device and to an oil changing device.