Research Of Single-Phase Tubular Switched Reluctance Linear Generator

This paper introduces the history and current situation of the development of wave energy at home and abroad, and for the demand of new clean energy waves, it introduces several kinds of linear motor which is suitable for wave energy power generation, and compares their advantages and disadvantages. On this basis, it introduces the features and advantages of tubular switched reluctance linear motor(TSRLM) which is applied to the wave energy. Then the basic structure and working principle of the TSRLM are given, which is suitable for low-speed direct-drive operation principle of wave power generation system. This paper takes a single-phase TSRLM as the research subject, the size and material of that is given. By the Flux finite element analysis software, the two-dimension and three-dimension finite element models of the motor are built and analyzed respectively. According to the finite element simulation, the flux distribution, flux-position-current characteristic and static forces and other static simulation results of the motor are respectively calculated, as well as dynamic generating simulation curves of winding flux, voltage, current and output voltage. The simulation results of the motor magnetic field distribution are analyzed.In Matlab/Simulink, the generating system model of the tubular switched reluctance linear motor is established, in which the current chopping control strategies is adopted. The two-dimension and three-dimension finite element simulation results of the motor fluxes are imported into the lookup table for generating system simulation. By current chopping control, the motor respectively for the two kinds of chopping current limit and five kinds of dynamic movement frequency of power system simulation, we can get the phase winding current waveforms and output voltage of the power generation system.What’s more, a prototype experiment platform is built up. Static force measurement and generating system experiment of the prototype are conducted respectively. It shows that the simulation results are consistent with the experimental results in the same condition. That is to say, the correctness of generating system simulation model built in this paper is verified. Compared with the two-dimension finite element simulation results, the three-dimension finite element simulation results are more accurate. Experiments based on power system, phase current waveform and output voltage of the winding are given. In order to improve the performance of the single-phase TSRLM, the motor structure is optimized. Comparison and analysis of results before and after the optimization are given. In the end, the paper is summarized and the future extensions of the relevant study are presented.