摘要
使用改进脉冲宽度调制PWM的控制方法,设计可变频的双向直流变换器。控制系统包括电压采集电路、电流采集电路、电压调节电路、脉冲调制电路、驱动电路以及控制信号传输电路等子电路。脉冲调制电路由误差放大器、迟滞比较器和积分器共同组成,不但可方便地改变其输出电压或使其输出电压稳定,还可以根据负载情况选择合适的工作频率。构建了一套1kW的双向直流变换器,完成了主电路和控制系统各元件的选型和参数选择。实验结果验证了该方法的可行性,且由该方法控制的双向控制器具有良好的动态特性和静态特性,以及工作频率可变和快速响应等特性。
A bidirectional DC-D converter has been designed employing a modified PWM control method. lhe control system comprises a voltage acquisition circuit, a current acquisition circuit, a voltage regulator circuit, a pulse modulation circuit, drive circuits and a control signal transmission circuit. The pulse modulation circuit consists of an error amplifier, a hysteresis compa- rator and an integrator, which cannot only easily change its output voltage or make it stable, but also choose an appropriate fre- quency according to the load. A set of bi-directional DC-DC converter is constructed, and the components are selected well. The simulation and experimentation verify that the proposed method is effective. The system has good dynamic and static characteris- tics, and is also featured by the variable frequency and rapid response.
出处
《中国科技论文》
CAS
北大核心
2013年第7期683-687,702,共6页
China Sciencepaper
基金
国际科技交流与合作专项资助项目(2010DFB63200)
山西省科技攻关计划资助项目(20120321005-02)
关键词
电气工程
开关变换器
小信号分析
PWM
变频调制
electrical engineering
switching converter
small signal analysis
PWM
frequency modulation
