大功率400Hz逆变电源数字控制设计  

Digital Control Design of High Power 400Hz Inverters

作　　者：刘春喜[1,2] 马伟明[3] 孙驰[3] 胡文华[4] 

机构地区：[1]浙江大学电气工程学院,杭州310027 [2]辽宁工程技术大学电气与控制学院,葫芦岛125105 [3]海军工程大学舰船综合电力技术国防科技重点实验室,武汉430033 [4]华中科技大学电气工程学院,武汉430074

出　　处：《电工技术学报》2011年第1期100-107,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(50607020、50737004ZD);国家自然科学基金委员会创新研究群体科学基金(50721063)资助项目

摘　　要：为了实现大容量中频逆变器的数字控制,在两级H桥结构基础上,分析了数字控制时由采样、计算及脉宽调制过程产生的延时及其对系统性能的影响。采用P+谐振控制,通过在连续域设计中引入等效延时环节的方法,对数字控制参数进行了设计。建立了一个100kVA的400Hz/115V逆变器仿真模型,通过离散数字仿真对所提出的方法进行了验证。采用DSP和现场可编程序门阵列(FPGA),以同一个正弦信号为参考,生成了单更新采样和双更新采样时的PWM波形,得到各波形基波分量与参考信号的相位差,与理论分析相一致,证明了延时分析的正确性。In order to implement digital control in high power medium frequency 400Hz/115V inverters,the delay induced by the processes of sampling,computing and PWM during digital control and its impact on the system performances are analyzed based on two-H-Bridge cascaded topology.The control parameters are designed in the continuous domain design by introduced the equivalent time delay when P＋resonant controller are adopted.The discrete simulation on a single-phase 100kVA medium frequency inverter model was presented,and the simulation shows the effectiveness of the proposed scheme.PWM waveforms in the single and double update mode operation are generated simultaneously with a common reference sinusoidal signal and the differences between each fundamental phase and reference signal phase are obtained by DSP and field programmable gate array（FPGA）.The results coincide with theoretical analysis.

关 键 词：控制延时 数字控制 数字PWM(DPWM) 大容量中频逆变器 P+谐振控制 

分 类 号：TM464[电气工程—电器]