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One of the fundamental requirements for testing and analysing a Permanent Magnet Synchronous Generator (PMSG) is to obtain its electrical and mechanical parameters. This paper describes the test set up and the procedure for obtaining them. Stator resistance and flux linkage measurements follow IEEE standards. In the other hand a new approach for an alternative stator inductance and inertia measurement...
This paper proposes a new construction for transverse flux machines (TFM) using a rounded surfaces core geometry. The new concept has been developed for TFM with U core geometry. In this case a new analytic design procedure was proposed. The analytic design of the new TFM construction is further improved by FEM modelling and analysis. Using the new concept, a significant reduction of the active materials...
The DeepWind concept has been described previously on challenges and potentials, this new offshore floating technology can offer to the wind industry [1]. The paper describes state of the art design improvements, new simulation results of the DeepWind floating vertical axis wind turbine concept, which implies a high potential for cost saving. The most critical aspects of the concept are addressed...
This paper presents an evaluation method of for specific iron losses in non-oriented laminated steel suitable for electric motors and transformers in the case of a sinusoidal excitation. The model is based on the separation of loss contribution due to hysteresis, eddy currents and excess losses and it is proposing an identification procedure for the model coefficients from multi-frequency single sheet...
This paper reviews the situation of V2G and proposes a solution involving a consolidating fleet manager, and a decision making process for the individual V2G electric car owner. A grid connection routine for electric vehicles is proposed. The algorithm dealing with decisions to be taken in foreseen circumstances is presented. Variables and rules employed used in the grid connection control are detailed...
The paper focuses of the Transverse Flux Permanent (TFPM) Generator as a solution for offshore direct drive wind turbines. A complex design algorithm is presented. Two topologies (U core and C core) of TFPM were considered. The analytical design is optimised using a combination of genetic algorithms and three dimensional finite element (FEM) analyses to obtain a minimum active mass for the generator.
This article reports on cooperation methods between researchers and students at different levels. Levels included in this work are BSc, MSc and PhD student levels. At Aalborg University, Department of Energy Technology education and research are closely linked [1],[2], [3], [4], [5]. The relationship between student-student; student-researcher and researcher-researcher is analyzed. The problems of...
This paper presents the method and result of optimizing a 5MW Transverse Flux Permanent Magnet (TFPM) generator using a genetic algorithm method. Because the main disadvantage of a TFPM generator is the price, a reduction in costs has to be considered in order to make it more attractive for the industry. The approach presented in this paper focuses on a reduction in mass of active materials, which...
This paper focuses on the preliminary design process of a 20 MW electric generator. The application calls for an offshore, vertical axis, direct drive wind turbine. Arguments for selecting the type of electric machine for the application are presented and discussed. Comparison criteria for deciding on a type of machine are listed. Additional constraints emerging from the direct drive, vertical axis...
A 5MW direct drive offshore wind turbine generator was designed and simulated using Vector Fields OPERA. This software allows calculation of the flux density, force, torque, and eddy currents in the machine at different rotor positions. Based on the data obtained from the model, initial assumptions could be validated. The selection of the type of generator was based on comparing different types of...
This paper applies a fitted genetic algorithm (GA) to the optimal design of transverse flux machine (TFM). The main goal is to provide a tool for the optimal design of TFM that is easy to use. The GA optimizes the analytic basic design of two TFM topologies: the C-core and the U-core. First, the GA was designed with real parameters. An, objective of the fitted GA is minimization of the computation...
This paper presents the structure, methodology and content of a new Diagnostics course at the Department of Energy Engineering, AAU. The lectures were to suit the problem based learning teaching method practised at AAU. Teaching was oriented to support the semester projects of the participating students. Additionally, specific subjects requested by participants, basic diagnosis and testing methods...
This paper presents a new torque optimization algorithm to maximize the torque generated by an SRM drive. The new algorithm uses a predictive strategy. The behaviour of the SRM demands a sequential algorithm. To preserve the advantages of SRM drives (simple and rugged topology) the new algorithm uses a predictive strategy. This predictive strategy complies with the sequential operation of SRM. The...
The level of vibration and noise is an important feature. It is good practice to explain the significance of the indicators of the quality of electrical machines. The mass production of small and medium-sized electrical machines demands speed (short typical measurement time), reliability of measurement, easy use and low cost. This paper proposes a new low cost equipment able to provide required performances.
A solar tracking system is designed to optimize the operation of solar energy receivers. The objective of this paper is proposing a new tracking system structure with two axis. The success strategy of this new project focuses on the economical analysis of solar energy. Therefore it is important to determine the most cost effective design, to consider the costs of production and maintenance, and operating...
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