基于Cuk拓扑结构的精准电流源建模与仿真

The modelization and simulation of precise current source by Cuk topology

恒流源广泛应用于航空、电子等领域,但相比恒压源而言,由于其结构复杂性和产品稳定性阻碍了其自身的发展。本文通过使用DC-DC变换器Cuk拓扑结构,实现了一个精准电流源的功能。文中阐述了使用Cuk拓扑实现恒流源的可行性,分析了Cuk拓扑结构作为恒流源的小信号等效模型,介绍了使用电流纹波补偿法和电流反馈回路法稳定输出电流的原理与实现电路。最后,通过PSIM软件仿真检验所设计的恒流系统稳定性,判断此系统的可行性。

The current source is widely used in many areas, such as aerospace, electronics.Compared with voltage source, however, the current source is strangled its improvement due to its complex structure and stability.The paper accomplishes a precise current source with Cuk topology in DC-DC converter. Moreover,the paper introduces the principles and actual circuits of the Method of Ripple Current Compensate and the Method of Current Feedback Loop ,describes the practicability and analyses the small-signal model of Cuk topology as current source.Finally, the paper simulates and tests the stability of the current source system designed via the simulation software PSIM, and checks its practicability.