Research of construction and control method of power converter that plurals and parallels connects power inverter with different output capacity

功率变流器广泛应用于从小容量家用电器到大容量铁路车辆等各个领域。在该功率变流器中，本研究确立了功率变流器的结构和控制方法，试图实现大容量和标准化。主要有以下几点：(1)阐明了不同输出共享驱动的并联多功率变流器电流分配的限制条件。(2)通过与传统的单独控制方法的比较，验证了和差电流控制方法对减小功率变流器之间的交叉电流而对输出没有贡献的有效性。(3)和差电流控制方法对减小交叉电流是有效的。但在增加功率转换器输出的组合电抗器的容量减少中发现了局限性。

The power converters are used in various fields such as from a home appliance of small capacity to large capacity railway vehicles. In this power converter, the construction and the control method of the power converter to attempt making to a large capacity and standardization were established in this research.They are the following points.(1) The limiting condition concerning the current allotment of the parallel, multiple electric power converter driven in a different sharing of output was clarified.(2) The effectiveness of the summation and difference current control method that reduced cross current that flowed between the power converters and did not contribute to the output was confirmed in comparing it with a conventional individual control method.(3) The summation and difference current control method is effective for the reduction of cross current. But the limit was found in the capacity reduction of the combination reactor that added the outputs of the power converters.