一种电容传递能量的恒流/恒流转换电路研究

Research on a constant current to constant current converter with capacitor transferring energy

为研究满足水下观测节点用电需求的电能转换电路,区别于以往采用电感作为储能与能量传递模块的电能转换电路,以库克电路为基础,提出了一种采用电容作为储能与能量转换介质的恒流/恒流转换电路,其负载的能量完全由电容进行供给。基于状态空间法对该电路的工作原理进行了分析,运用saber软件建立了仿真模型,并搭建实际电路进行了实验验证。结果表明:该电路能够完成恒流/恒流转换,且输出电流只受开关管的PWM信号占空比的控制,具有输出电流动态调节范围大的特点。

In order to study the power conversion circuit to meet the demand of underwater observation nodes,a novel constant current to constant current(CC-CC)converter with capacitors as energy storage and conversion media,different from previous energy conversion circuit that uses inductors to store and transfer energy,was proposed based on CUK circuits,in which the energy of the load was completely supplied by the capacitor.To prove the feasibility of the designed converter,the circuit working principle was analyzed by applying the state space method,the simulation model built with saber and validated with experiments on a prototype.The results show that the circuit can achieve CC-CC conversion,and the output current is only controlled by the duty cycle of PWM signal.In addition,the circuit has the characteristics of large output current dynamic adjustment range.