纯硬件开环电压型无死区半桥逆变器研究  

Study on the Pure Hardware Open Loop Voltage Type Non-Dead Zone Half-Bridge Inverter

作　　者：汤定德[1] 

机构地区：[1]江西科技学院机械工程学院,江西南昌330098

出　　处：《自动化仪表》2018年第2期69-71,共3页Process Automation Instrumentation

基　　金：江西省科技支撑计划基金资助项目(20133BBE50002)

摘　　要：随着新能源发电应用的不断推广,逆变器的重要性越发凸显。分析了单极性正弦脉宽调制(SPWM)驱动在纯电阻(弱感性)负载下实现无死区半桥开环逆变输出的可行性,介绍了一种适用于新能源发电的纯硬件开环电压型无死区半桥逆变器。该逆变器采用模块化和半桥开环逆变结构,有效避免了因干扰而导致的开关器件误损坏以及因设置死区时间而导致的基波电压损失,且输出电压波形较好。利用MATLAB软件进行系统仿真,所得结果与预期相符。由此表明:该逆变器可在闭环控制条件下维持系统稳定,并确保纯电阻(弱感性)负载下的逆变输出电压波形不失真。With the promotion of new energy power generation, the significance of inverters is increasingly prominent. The feasibilityof the unipolar- sinusoidal pulse width modulation SPWM）to implement non-dead zone half bridge open loop inverter output underthe pure-resistance （weak inductance） load is analyzed and a pure hardware-open-loop voltage type non dead zone inverter suitablefor new energy power generation environment is introduced. The modular and half bridge open-loop inverter structure is used to avoidthe error damage caused by interference and the loss of fundamental-voltage which is caused by setting dead-time, and the invertercan offer good output waveform. By adopting MATLAB software, the system simulation model is established. The results of simulationare in accordance with the predictive results. It is shown that under closed loop condition, the inverter maintains the stability ofsystem, and ensures that the output voltage waveform may not be distorted for the condition of pure resistance（ weak inductance） load.

关 键 词：新能源 逆变器 单极性调制 滤波 电压 电流 

分 类 号：TH86[机械工程—仪器科学与技术] TP23[机械工程—精密仪器及机械]