dsPIC芯片的单相正弦波逆变器设计  

Design of Single-phase Sine Wave Inverter Based on dsPIC

作　　者：周旺 郎宝华[1] Zhou Wang;Lang Baohua(School of Electronic Information Engineering,Xi＇an Technological University,Xi＇an 710021,China)

机构地区：[1]西安工业大学电子信息工程学院,西安710021

出　　处：《单片机与嵌入式系统应用》2018年第6期69-73,共5页Microcontrollers & Embedded Systems

摘　　要：选择Microchip的dsPIC33F系列芯片作为系统的控制器,通过比较分析最终选取交错反激式的拓扑结构进行微逆变器的设计,选用具有电流源特性的DCM工作模式。该设计采用双级式的拓扑结构,前级将交错反激变换器输出的直流电流调制为正弦半波波形,后级再全桥逆变对前级输出的正弦半波电流进行翻转得到正弦波波形的电流。主开关和从开关之间通过非互补导通的有源箝位技术来解决由变压器漏感所引起的主开关的关断电压尖峰和功率耗损问题,漏感能量通过该技术得到回收,该技术实现了主开关的零电压(ZVS)开通,并且主开关两端的尖峰电压也得到了降低。The dsPIC33 Fis used as the main control chip.The interleaved flyback topology is chosen to design a micro inverter,and the DCM mode is adopted because of its current source speciality.The flyback output current is modulated to be a half-sine wave current by the micro inverter,and then the phase change bridge converts the current to be a sine-wave current.The un-complementary turn-on strategy has been adopted to deal with the problem caused by the leakage inductance of the transformer,which also achievs the recycling of the leakage inductance and the ZVS turn-on of the main switch is realized,the efficiency and stability of the micro inverter are improved as well.

关 键 词：dsPIC33F 微逆变器 光伏并网 交错并联 有源箝位 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]