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The structural characteristics and basic design requirements of design of switched reluctance linear generator are introduced. According to the general principles and design experience of electromechanical design, the dimension of design of switched reluctance linear generator is determined, and the two-dimensional and three-dimensional static finite element models of design of switched reluctance linear generator are established in Flux 2D and Flux 3D respectively. By comparing the simulation results of the two-dimensional model and the three-dimensional model, it is found that the difference between the real simulation results of the 2D model and the 3D model is small, and the calculation time cost of the 2D finite element simulation is much lower than that of the 3D model. Therefore, the subsequent work of this paper adopts the 2D finite element model. Finally, the static electromagnetic field and electromagnetic characteristics of the design of switched reluctance linear generator are analyzed by finite element analysis.

This paper analyses the hardware structure of AC sampling measurement system and the basic principle of half wave Fourier algorithm in AC sampling measurement device. The hardware structure of AC sampling system is introduced. At the same time, the half-wave Fourier algorithm is improved. The improved half-wave Fourier algorithm can eliminate the error caused by the attenuation of aperiodic components. The accuracy of AC sampling is greatly enhanced. Finally, by comparing the amplitude and phase Angle errors calculated by the algorithms, the ability of the new algorithm to eliminate errors is proved.

The dielectric strength of insulating slice in the high voltage apparatus can be changed by doping the nano clay. In order to test the breakdown time of nano clay-doped polypropylene slices in different temperatures, an experiment has been carried out. In this article, the model of electric field simulation for the experiment is studied. Influences of the thickness and relative permittivity of polypropylene slice on electric field strength are considered. The simulated results can be used as reference for analysing the experimental phenomena of the breakdown of polypropylene slices.

Data acquisition on the secondary side is an important part of high voltage signal measurement. Based on Arduino microcontroller, a data acquisition (DAQ) system is developed. The frequency, root-mean-square value and DC component of periodic voltage waveforms can be measured by the system. The relative errors of the DAQ system are tested by comparing with standard voltage waveforms. The measurement range of the DAQ system is further discussed. The DAQ system in this paper is helpful to measure the periodic voltage waveforms on secondary side of high voltage measuring device.

The water loss in the wet cooling tower of thermal power plants is serious. There is a lack of high-efficiency recycling method for water mist with a small particle size until now. Based on the principle of electrostatic deposition, this paper analyses the principle of water mist recovery based on corona discharge. The water recovery device based on corona discharge was designed. The equivalent flow model was used to calculate the ion flow field distribution in the device, and the influence of the size of the water collecting plate on the ion flow field was analysed. By using the finite element analysis (FEA), the influence of the shape of the water collecting plate and the structure of the discharge electrode on the electric field in the device is calculated. A device optimization program is proposed. The results of this study provide theoretical guidance for the recycle of water mist in thermal power plant cooling towers.