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This paper analyzes power generation from sea waves by using power conditioning system and linear permanent magnet generator. A buoy is placed on the ocean surface and connected to the linear generator. The wave energy is carried out from the movement of a buoy. An electrical conversion system is needed between the generator and the grid. For an analysis of the power system, the modeling of the linear...
This publication deals with the calculation and the measurement of the iron losses in a linear generator. The linear generator is intended for use in a hybrid power train design for a vehicle. The system surrounding the linear generator and some parameters have an influence on the linear generator and its iron losses. They will be explained to achieve a fundamental understanding of the requirements...
In the perspective of the fossil fuels deposits depletion new energy resources must be developed; amongst them the renewable energy sector seems to be able to provide a long term solution. Besides the already popular wind, solar or thermal energies, the ocean energy sector offers a virtually infinite energy potential; many solutions for harvesting and converting this energy into usable form are under...
This publication deals with the design calculation of a linear generator intended for use in a hybrid power train design for a vehicle. The system surrounding the linear generator and some parameters have an influence on the linear generator. They will be explained to achieve a fundamental understanding of the requirements and the resulting topology selection. Then, the analytical and numerical calculations...
The controller for Archimedes wave swing (AWS) based wave energy conversion (WEC) system is designed in this paper. Based on the model of the AWS based WEC system in the d-q frame of reference, the control strategy of the WEC system under the irregular wave is derived. The AWS based WEC is regulated to be in resonance with the wave by the stiffness control of the linear permanent magnet generator,...
This paper presents the design procedure and modeling methodology for a four sided floating type of linear permanent magnet generator used in sea wave energy extraction applications. The hydraulic system of wave generation with buoy has been developed. Appropriate coupled magnetic-electric-mechanical models for the analysis of the linear permanent magnet (LPM) generator is researched with finite element...
This study presents the investigation on the magnetic force phenomenon in permanent magnet (PM) wind turbine generators. Owing to the presence of PMs, the inherent and ever-existing magnetic force between the stator and rotor becomes one of the most critical phenomena in these generators. Whether it is during the assembly process throughout the manufacturing stages or when the generator is in operation,...
This paper analyses the stator teeth geometry effects on cogging force of permanent magnet linear generators. The method making translator adjacent sides' permanent magnet allotropic is proposed to minimize the cogging force of four sided permanent magnet linear generators. The dynamic modeling of the generator's performance is based on finite element method. The generator is coupled to a particular...
One of the most important drawbacks to the application of the axial flux permanent magnet generator is represented by the relevant mechanical stresses due to the electromagnetic attraction between the stator and the rotor parts, which may arise even in double-side configurations, due to slight air-gap asymmetries. In the paper, a time-effective procedure is presented to analyze the unbalanced condition,...
Linear permanent magnet generators are a potentially useful technology for wave power applications. Typically, optimisation and comparison of these generators is based on an electromagnetic analysis with limited regard for the structural and thermal analysis. This paper presents a comparison of an air-cored synchronous machine and a double-sided iron-cored synchronous machine which includes the structural...
The aim of this paper is to review direct-drive generators and to suggest promising direct-drive generator concepts for large wind turbines. Different large direct-drive generators are compared based on the mass and the torque. Features of different PM machines are investigated to find promising machine type for direct-drive. The requirements and alternative solutions are suggested for both electromagnetic...
The benefits of wave-energy are undisputed, however the most suitable method of energy extraction is. A double-sided tubular permanent magnet linear synchronous generator is presented as a possible solution in direct-drive applications. The proposed topology would resemble a double-sided flat LSM that has been curved to be tubular. Both the stator and translator designs are discussed. A mathematical...
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