Abstract
This paper presents the development of an electromagnetic energy harvester for electrical supply of a sensor unit integrated on the rotating inner ring of a rolling bearing. This energy harvester is of special interest for condition monitoring tasks on rotating shafts. A sensory monitor on the inner ring can detect wear conditions at an early stage. The harvester works without mechanical and energetic contact to surrounding components by utilizing the rotational energy of the shaft. The functionality of the Energy Harvester is enabled by the inertia principle, which is caused by an asymmetrical mass distribution. We provide simulations to validate the designs. This work includes simulation studies on the electrical power output of the harvester. Therefore, the necessary simulation of the magnetic problems is realized in a substitute simulation environment. The harvester design enables existing machines to be equipped with the harvester to provide an energy supply on rotating shafts. This clamp connection enables shaft mounting independent of location without mechanical work on the shaft. With an electrical power of up to 163.6 m W, at 3600 rpm, the harvester is used as an energy supply, which enables sensor-based monitoring of slow wear processes.
Highlights
In order to increase machine productivity, there is a need for continuous information about the current wear condition of a machine
This paper presents the development of an electromagnetic energy harvester for electrical supply of a sensor unit integrated on the rotating inner ring of a rolling bearing
With an electrical power of up to 163.6 m W, at 3600 rpm, the harvester is used as an energy supply, which enables sensor-based monitoring of slow wear processes
Summary
In order to increase machine productivity, there is a need for continuous information about the current wear condition of a machine. Condition monitoring of the rotating inner ring requires an energy supply to the sensor components. For the conversion of rotational energy into electrical energy, triboelectric nanogenerators (TENG) can be considered [10] Generators of this type are based on a frictional contact between two materials, resulting in an electrostatic charge of the surfaces. Mounting location on shaft ends development of the generator unit spring-mass oscillator adjust to the characteristic parameter resonance frequency use of rotary non-uniformity movements mechanical contact to surrounding components required. The issue is increased by the fact that the Energy Harvester can be installed on existing machines For this reason, this design is constructed in such a way that it can be adapted to different shaft sizes and there is no contact to surrounding components (stator of the diagnostic object). This construction of the harvester allows installation in systems existing without without contact between the harvester and the stator unit of the diagnostic object. object
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