CAJ | 학술논문

指出了同步降压型直流-直流变换器从拓扑结构上实现软开关技术优点与在大功率场合下电流纹波大的特点,结合电感磁耦合技术将其扩展为双相结构的同步Buck型DC/DC变换器,分析了电感输出电流纹波减小的原理,并对不同负载下电路的工作特点进行了分析,采用可变频率的脉冲宽度调制控制方式以达到不同输出功率时的效率,试制了一台2 kW的同步Buck DC/DC变换器样机,并给出了实验结果.变换器采用DSP芯片TMS320F2808作为控制管理芯片,通过积分分离数字PID算法改变控制量,具有较优异的动态性能,在蓄电池维护领域得到较好的应用.
지출료동보강압형직류-직류변환기종탁복결구상실현연개관기술우점여재대공솔장합하전류문파대적특점,결합전감자우합기술장기확전위쌍상결구적동보Buck형DC/DC변환기,분석료전감수출전류문파감소적원리,병대불동부재하전로적공작특점진행료분석,채용가변빈솔적맥충관도조제공제방식이체도불동수출공솔시적효솔,시제료일태2 kW적동보Buck DC/DC변환기양궤,병급출료실험결과.변환기채용DSP심편TMS320F2808작위공제관리심편,통과적분분리수자PID산법개변공제량,구유교우이적동태성능,재축전지유호영역득도교호적응용.
The advantage of synchronous Buck DC/DC converter in implementing soft-switching by topology is pointed out,as well as its high current ripple in high-power application is indicated.Combined with the magnetic coupling technology,the single-phase synchronous Buck DC/DC converter is expanded into twophase synchronous Buck DC/DC converter.The principle of reducing the inductor output current ripple is introduced and the operational characteristics are analyzed under different loads.The multi-frequency PWM (Pulse-Width Modulation)is applied to maintain the high efficiency for different power outputs.A 2 kW prototype is manufactured and the experimental results ale presented.DSP TMS320F2808 is used to control the DC/DC converter and the control variables ale adjusted by the integral-separation control algorithm.The designed converter has good dynamic performance and excellent application in storage cell maintenance.