半桥式三电平AC-AC直接变换器  

Half-bridge Three-level AC-AC Direct Converter

作　　者：朱劲松[1] 李磊[1] 

机构地区：[1]南京理工大学自动化学院,江苏南京210094

出　　处：《电源世界》2012年第1期27-31,共5页The World of Power Supply

基　　金：国家自然科学基金(51177073);江苏省自然科学基金(BK2009389);"卓越计划""资金之星";南京理工大学自主科研专项计划(2010ZYTS043)

摘　　要：文章提出了基于Buck变换器的半桥式三电平AC-AC直接变换器,有效解决了两电平AC-AC变换器在大容量变换领域中存在的开关管电压应力高、谐波干扰严重等问题,能够将不稳定的交流电转换成同频率质量较高的正弦交流电,电路结构简单,具有高频电气隔离、双向功率流的特点。文章研究了该变换器的电路结构、高频开关工作过程、稳态原理,并采用基于电压瞬时值反馈控制原理,给出了驱动信号原理框图,通过仿真试验,充分验证了半桥式三电平直接变换器理论的正确性和先进性。In order to solve the problem such as switch voltage stress and harmonic interference of the two-level AC-AC converter existed in the field of large capacity transform, this article proposed the half-bridge three -level AC-AC direct converter based on the Buck converter. The converter could convert the alternating current with instability distortion to the steady sine alternating current with same frequency, which has the characteristics of simple circuit, electrical isolation of high frequency, two-way power flow. This paper has studied the topology, high frequency Switching process, the theory of steady state, and the feedback control strategy of instantaneous voltage v.alue of this converter, also the diagram formed by the driving signal is given. At last, the correctness and advancement of this converter are verified through simulation tests.

关 键 词：三电平 交流变换器 隔离型 电压瞬时反馈 

分 类 号：TM46[电气工程—电器]