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| 基于TMS320F28335的SHEPWM数字实现 | |
| 引用本文： | 王琛琛,李瑞夫,周明磊. 基于TMS320F28335的SHEPWM数字实现[J]. 北方交通大学学报, 2011, 0(5): 89-93,105 |
| 作者姓名： | 王琛琛 李瑞夫 周明磊 |
| 作者单位： | 北京交通大学电气工程学院,北京100044 |
| 基金项目： | 基金项目：中央高校基本科研业务费专项资金资助（EllJB00220） |
| 摘 要： | 大功率交流传动机车牵引传动系统受器件开关频率的限制，在高速运行区需要采用同步调制的方法．本文对实际应用中最常用的特定消谐PWM（SHEPWM）技术的基本问题进行了深入分析与研究，针对双极性电压型逆变器建立了SHEPWM的数学模型，并在此基础上研究了特定消谐非线性方程组的计算方法及曲线拟合优化方法，以及基于载波方式的数字实现方法，从而简化了SHEPWM的角度计算和数字实现．研究了基于TMS320F28335的特定次谐波消除脉冲生成方法及不同载波比之间的切换条件，最后通过仿真和实验分析、验证了其正确性． |
| 关 键 词： | 特定消谐PWM 机车牵引 曲线拟合 谐波分析 TMS320F28335 |
Digital realization of SHEPWM based on TMS320F28335 |
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| WANG Chenchen,LI Ruifu,ZHOU Minglei. Digital realization of SHEPWM based on TMS320F28335[J]. Journal of Northern Jiaotong University, 2011, 0(5): 89-93,105 | |
| Authors: | WANG Chenchen LI Ruifu ZHOU Minglei |
| Affiliation: | (School of Electrical Engineering,Beijing Jiaotong University, 13eiiing 100044 ,China) |
| Abstract: | For the constraint of switching frequency, the traction drive system of high power AC locomotive mainly uses synchronous modulation PWM in high speed area. The fundamental problems of SHEPWM are analyzed and studied in this paper. The mathematical model of SHEPWM aimed at bipolar source inverter is built. And based on the model, the computational method and choice of initial value of selective harmonic eliminated nonlinear equations are developed, which simplified the calcula- tion of switch angles and the digital realization. The generating methods of SHEPWM and the transi- tion between different modulation modes using TMS320F28335 are studied in this paper. Finally the validity of the proposed methods is verified by simulation and experimental results. |
| Keywords: | selective harmonic elimination PWM locomotive traction curve fitting harmonic analysis TMS320F28335 |
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