| 数字控制DC-DC变换器的延时离散模型及影响分析 |
| |
| 引用本文： | 周雒维,孙鹏菊,杜雄.数字控制DC-DC变换器的延时离散模型及影响分析[J].电机与控制学报,2010,14(5). |
| |
| 作者姓名： | 周雒维 孙鹏菊 杜雄 |
| |
| 作者单位： | 重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆,400044 |
| |
| 摘 要： | 为分析数字控制 DC-DC 变换器延时对系统性能的量化影响,详细概括和总结不同延时情况,并对其进行重新归纳和对比分析.在 DC-DC 变换器状态空间模型的基础上,建立包含延时在内的数字控制 DC-DC 变换器的小信号离散模型,并对各种延时情况的离散模型进行分析.以Buck 变换器为例,采用常用的PI补偿器,在系统相位裕度相同时,分析补偿器有解且系统性能最优的情况,得到不同延时情况下系统带宽下降为没有延迟时的30%～80%的结论.实验结果证明所得结论的正确性.建立的数字控制DC-DC变换器延时离散模型和延时影响的量化分析结论,为数字控制延时问题研究以及延时补偿问题分析提供理论依据.
|
| 关 键 词： | 数字控制 延时 离散模型 量化分析 DC-DC变换器 |
Discrete-time modeling of digital controlled DC-DC converters and the effects of time delay |
| |
| ZHOU Luo-Wei,SUN Peng-ju,DU Xiong.Discrete-time modeling of digital controlled DC-DC converters and the effects of time delay[J].Electric Machines and Control,2010,14(5). |
| |
| Authors: | ZHOU Luo-Wei SUN Peng-ju DU Xiong |
| |
| Affiliation: | ZHOU Luo-wei,SUN Peng-ju,DU Xiong (State Key Laboratory of Power Transmission Equipment & System Security and New Technology,Chongqing University,Chongqing 400044,China) |
| |
| Abstract: | The delay forms in practical applications are summarized in detail in order to analyze the quantization effects of the inherent time delay introduced by zero-order-hold effect and the computational time delay in digital controlled DC-DC converters. The exact small signal discrete-time models with time delay for digital controlled DC-DC converters are established. The models,which based on well-known approaches to discrete-time modeling,take modulator effects and delays in the control loop into account. Take... |
| |
| Keywords: | digital control system time delay discrete-time model quantization effects DC-DC converters |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
