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In this paper, the finite-element method (FEM) based on 2-D numerical analysis was used for the basic design and characteristics analysis of a small-scale 3-kW wind power generator to which a permanent-magnet generator was applied. A prototype was manufactured, and a characteristics experiment was performed to verify the designed generator. In addition, the optimization design in order to satisfy...
This paper discusses about the effects of cogging torque due to the amount of stator slot present in a typical permanent magnet generator using finite element analysis. All parameters other than stator slot number are kept at a constant to extract the cogging torque waveform on each run of the simulation using the weighted stress tensor method. The design of the generator itself is also kept at a...
This study evaluates the power characteristics of a novel permanent magnet flux switching generator (PMFSG) for a low-speed wind turbine. The PMFSG is an outer-rotor type generator. An induced voltage is generated by the change in the magnetic flux flow when the relative position of the teeth changes. The 2-D finite element method (2D-FEM) is used to analyze the PMFSG. The results reveal that the...
This paper presents a new double-stator directly driven permanent magnet machine for wind power generation. The machine configuration is so unique that it can significantly improve the torque density with small cogging torque. Because of the nature of double-stator windings, the machine can flexibly change their connections, hence providing a constant output voltage over a wide speed range for battery...
In the present study, a novel small permanent magnet generator is proposed. Various characteristics are analyzed using the FEM. A suitable structure for high power and low cogging torque is investigated. Low-cogging-torque characteristics can be achieved by optimization of the auxiliary pole shape. The proposed generator is a low cogging torque generator that operates at low speeds and so is expected...
In a permanent magnet machine cogging torque is produced due to the interaction between the rotor magnets and the slots and teeth of the stator. This paper is a result of an ongoing research work that deals with reduction of cogging torque in dual-rotor radial flux permanent magnet generator (DRFPMG) for direct coupled stand-alone wind energy systems. The DRFPMG is an existing machine design. Two...
The permanent magnet (PM) generator direct-driven by wind turbine has the advantages of high efficiency, simple structure and reliable operation, and the features of low speed, multi-pole and large size. How to utilize sufficiently the structural dimension, improve the performance and reduce the cost of the machine by proper choice of the pole number and stator slot number is an important problem...
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