开关磁阻发电机主电路的一种新拓扑

针对开关磁阻发电机在低压系统中输出功率较低的问题，本文根据开关磁阻发电机的运动原理，对传统主电路加以改进，提出一种新型主电路拓扑结构。从新型主电路拓扑结构中可以看出：在励磁阶段，定子径向相对齿极上相绕组的线圈为并联关系；在发电（续流）阶段，定子径向相对齿极上相绕组的线圈为串联关系，这样就达到了强化励磁提高输出功率的目的。为验证理论的正确性，分别用传统主电路拓扑结构和新型主电路拓扑结构对8／8结构开关磁阻发电机样机进行了实验。理论分析和实验结果表明：在相同工作条件下，其最大效率可提高60％，可见该新型主电路在低压系统中作发电运行时，能获得较为满意的效果。

A Converter for Switched Reluctance Generator

According to the principle of the switched reluctance generator (SRG), the magnetic energy will be increased if the excitation is reasonably increased. When the converted energy is increased, so reasonable and sufficient excitation is important to improve the power output. By this principle, a novel converter for SRG is presented. In the exciting stage, the power switches turn on, the current from the battery simultaneously flows into the two windings through diodes, so the two windings are connected in parallel in exciting period. In the generating stage, the power switches turn off, the winding current flows back to the battery through other diodes, so the two windings are in series. As a result, the exciting voltage of each winding is twice than the generating voltage. The reinforced excitation is achieved, which allows SRG to raise the power output in low-voltage system. Results of an experimental prototype are presented. Experimental results show that the efficiency can be improved to 60% under same working conditions, so the novel converter is efficient to the SRG in low-voltage system.