摘要
研究的DC/DC变换器技术已用于国际空间站上的一个大型科学实验,即阿尔法磁谱仪。由于太空装置受太阳光的辐射,位置变化时温度变化也非常大,而太空装置内仪器传感系统的温度必须保持在10℃～20℃内,因而必须研制一种热控制系统(Thermal Control System,简称TCS)。这里介绍的TCS DC/DC变换器,就是针对TCS的需求,使DC/DC变换器输出可变的直流电压,以此控制TCS的制冷和加热装置,使装置内的温度达到预期要求。基于实验和理论分析结果,分析了Buck变换器作为一类典型的电力电子电路所具有的固有非线性和不确定性现象,揭示了电路和器件的寄生参数是引起Buck变换器非线性的主要原因。
The design is intended for a large international scientific experiment in outer space.The temperature of outer space changes violently because of the sun ray radiation,but the experiment devices work well only under the environmental temperature between 10~C to 20~C ,so a temperature control system named Thermal Control System （TCS） should be designed and used.Buck DC/DC converters in the TCS are key devices that provide power supplies of the Peltiers and Heaters with output voltage range from 0 to 15V.The details of the Buck DC/DC converter design and computation are introduced and related experimental results and analysis are given also.Based on experimental results and simulation analysis,we observe some abnormal signal waveforms in the DC/DC converters which is inconsistent with the existing theory analysis results.The mechanism of the abnormal phenomenon is explained by experiments and theoretical analysis.The inherent non-linearity and uncertainty in Buck DC/DC converter as in typical power electronic circuits are mainly caused by parasitical parameters of devices and circuits.
出处
《电力电子技术》
CSCD
北大核心
2007年第8期45-47,共3页
Power Electronics
