单位功率因数PWM整流器最大传递功率研究

作者：辛颂旭 日期：2008-12-26/span> 浏览：3862 查看PDF文档

单位功率因数PWM整流器最大传递功率研究

辛颂旭
（国网北京经济技术研究院，北京 100761）

摘要：为了实现单位功率因数脉宽调制（PWM）整流器直流侧电压的稳定控制，通过分析PWM整流器的数学模型，在器件参数和交流侧电压已确定的情况下，研究了PWM整流器的交流侧和直流侧之间可传递的最大功率，分析了最大可传递功率与开关管参数之间的关系，并以交流侧电压为变量，研究了PWM整流器最大可传递功率与交流侧电压的关系。实际应用表明，以此为依据可选择合适的交流侧电压以达到充分利用开关管容量的目的，同时该方法对选择合适的开关管和确定直流侧负载上限具有一定的参考价值。
关键词：脉宽调制整流器；单位功率因数；最大传递功率
中图分类号：TM46文献标识码：A文章编号：1001-4551(2008)12-0043-03

Maximum transmission power of unity power factor PWM rectifier
XIN Song-xu
(State Power Economic Research Institute, Beijing 100761, China)
Abstract: Aiming at maintaining the stabilization of the capacitance voltage on unity power factor pulse width modulatoin(PWM) rectifier, the mathematical model of PWM rectifier was studied. The maximum transmission power of PWM rectifier, the relation between the maximum transmission power and switch parameters were analyzed, when the switch parameters and AC side voltage were determined. The relation between the maximum transmission power and AC side voltage was analyzed, when AC side voltage was variable. The application shows that it can help to choose suitable AC side voltage, giving full play to the switch capacity. The conclusions can provide some reference for choosing suitable switches and confirming the load limit of DC side.
Key words: pulse width modulation(PWM) rectifier; unity power factor; maximum transmission power