DEVELOPMENT OF INTERIOR PERMANENT MAGNET LINEAR SYNCHRONOUS GENERATOR THAT CAN CONVERT FROM WAVE POWER WITH HIGH EFFICIENCY.

本研究的目的是开发线性发电机，以实现高效的波浪有源发电系统，而不需要传统系统的低效率空气转换设备。由于旋转发电机采用缓慢的往复运动驱动，具有在高速运行时变得高效率的特点，因而系统的复杂性和昂贵性影响了波浪发电系统的实际应用。在本研究中，研究了各种特性，以开发具有最有效结构的线性发电机。对永磁型线性同步发电机（PM- lsg）、混合型线性步进发电机（HB-LSTG）和高密度型线性步进发电机（HD-LSTG）进行了试验研究。在波浪发电中，必须对直线发电机进行防水成型。在PM-LSG中，即使间隙长度为1mm或更大，也能获得足够的感应电压。LSTG类型不能充分显示性能。此外，还明确了在24mm左右的极距处存在效率最高的最佳点。可以从波浪中提取的电能大致估计为1kW/m左右。如果发电机做成多层结构，就有可能以高速率收集7kW/m的波能。在相同磁体用量下，埋地结构的永磁- lsg比表面安装的永磁- lsg功率高10%左右。由于发电机在埋地结构中具有反向显著性，因此通过与变换器的最优电流矢量调节可以进一步改善发电机的输出和效率。

The aim of this research is development of the linear generator to achieve a highly effective wave activated power generation system, which doesn't need low efficiency air conversion equipment such as conventional system. The system complexity and expensiveness to disturb the practical use of the wave power generation system is caused because the rotation generator that has the characteristic that becomes high efficiency at high speed operation is driven by the slow reciprocated motion.In this research, various characteristics were examined to develop the linear generator that has the most effective structure. PM type linear synchronous generator (PM-LSG), hybrid type linear stepping generator (HB-LSTG), and high density type linear stepping generator (HD-LSTG) were examined. It is necessary to give the waterproof molding in the linear generator for the wave power generation. An enough induced voltage is obtained even by the gap length of 1mm or more in the PM-LSG. The LSTG type cannot show the performance enough. Moreover, it was clarified that there is optimum point of the maximum efficiency in the pole pitch about 24mm. Electrical energy that can be taken out of the wave is estimated roughly with about 1kW/m. If the generator is made multilayered structure, it has been understood that there is a possibility that the wave energy of 7kW/m can be collected at the high rate.The buried structure PM-LSG became about 10% high power from the surface mounted PM-LSG in the amount of the same magnet. Because the generator has reverse-saliency in the buried structure, the output and the efficiency of the generator are thought to be ameliorable further by the optimal current vector regulation with the converter.