Development of new power converters with hybrid construction to reduce electromagnetic interference

本研究项目的目标是对混合PWM转换器减少电磁接口的开发。混合PWM电路是并行连接的两个分量桥接电路的混合PWM电路的概念，即主和辅助桥接电路，以及主桥接电路，处理有源功率具有完全的当前评级和低开关频率。辅助桥接电路可以提高输入当前波形具有较低的当前评级和较高的切换频率。“因为整个电流的高频开关可以被排除在混合存储器中，EMI也可以被减少，结果的摘要也可以随之而来。”混合动力转换器的新配置已经提出。混合PWM计数器的控制系统原则和系统实现已经开发出来。设计的考虑是这样的，即对所需的当前评级的评估。作为一项实验性调查，一个实验室测试系统已被构建。《混合建筑对波浪形改进的基本效应》是由计算机模拟和实验调查确认的。关于电磁干扰物的减少（EMI）的有效性已经被评价为实验。通过优化当前功率装置的评级和对功率装置的切换速度的调整，以及对功率装置的切换速度的调整，已经进行了调查。以上述结果为基础，提议的混合功率转换器的有效性和可用性得到了确认。当然，我相信这个研究项目的预期目标已经实现了。

The purpose of this research project is the development of the hybrid PWM converters to reduce the electromagnetic interferences. The hybrid PWM rectifier consists of parallel-connected two component bridge circuits, that is, main and auxiliary bridge circuits, The main bridge circuit to handle the active power has a full current rating and a low switching frequency. The auxiliary bridge circuit to improve the input current waveform has a small current rating and a high switching frequency. Because the high-frequency switching of the full current can be avoided in the hybrid rectifier, the EMI can be reduced.The summery of the results is as follows.・The new configuration of the hybrid power converter has been proposed.・Control system principle and system implementation for the hybrid PWM rectifiers have been developed.・The design considerations such as evaluation of the required current rating of the auxiliary bridge have been carried out.・For experimental investigation, a laboratory test system has been constructed.・The basic effectiveness of the hybrid construction on the waveform improvement has been confirmed by the computer simulation and experimental investigations.・The effectiveness on the reduction of the electromagnetic interferences (EMI) has been evaluated experimentally.・The possibilities of the further EMI reduction by optimizing the current rating of the power devices and the adjustment of the switching speed of the power device have been investigated.With the above results, the effectiveness and usefulness of the proposed hybrid power converters have been confirmed. Consequently, I believe that the expected goal of this research project has been attained.