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For the first time, this paper presents field computation results and performance of an axial-flux permanent magnet synchronous generator (AFPMSG) based on a time-stepping, 3-D finite-element analysis (3-D FEA). The prototype generator studied has a ferromagnetic outer rotor frame and a totally enclosed design, while a coreless stator armature configuration is used. Based on the machine geometry,...
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...
This paper discusses the possibilities of applying high temperature superconducting (HTS) synchronous motor to Superbus, an alternative and sustainable type of public transportation developed at TU Delft. Two important factors within the Superbus drive that influence the operating range are weight and efficiency: increasing the weight results in larger roll resistance while the better the efficiency...
The theoretical derivation of equivalent circuits by analytically modeling the internal electromagnetic phenomena constitutes a classical approach for analyzing electric machines. Anyway, textbooks often tend to address it adopting a limited approach focused on specific common cases, thus introducing not strictly necessary hypotheses that turn into a reduced insight of the matter. On the other hand,...
The decisive elements establishing the technical and economic success of a constructive solution of an asynchronous motor are the answer characteristics in dynamic regime, the energy consumption, the gauge dimensions, the speed range, the answer time, the noise level, and a final aspect, important in equal extent, is the cost price. All these performances can be performed with the help of the electronic...
In present article a dynamic model of universal motors, based on the design data is developed. Suppose the supply voltage is harmonic, but variable. After representing of the mathematical model a simulation model based on the Matlab-Simulink is derived; this allows for the determination of the waveforms of the speed current and torque of the machine for different state operation. Induced voltage of...
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