Based on the analysis of the basic principle of slope compensation, a high-precision adaptive slope compensation circuit for peak current mode boost DC/DC converter is designed. The circuit dynamically detects the inp...Based on the analysis of the basic principle of slope compensation, a high-precision adaptive slope compensation circuit for peak current mode boost DC/DC converter is designed. The circuit dynamically detects the input and output voltage of the boost circuit to realize automatic adjustment of the compensation amount with the change of duty ratio, which makes the ramp compensation slope optimized. The design uses a high-precision subtracter to improve the accuracy of slope compensation. While eliminating sub-slope oscillation and improving the stability of boost circuit, the negative impact of compensation on boost circuit is minimized, and the load capacity and transient response speed of boost circuit are guaranteed. The circuit is designed based on SMIC 0.18um CMOS technology, with simple structure, high reliability and easy engineering implementation. Spectre circuit simulator 17.1.0.124 64b simulation results show that the circuit has high compensation accuracy and wide input and output voltage range. When the working voltage is 3.3 V, the compensation slope can be adjusted adaptively under different duty cycles, and the minimum error between the compensation slope and the theoretical optimal compensation slope is only 0.42%.展开更多
太阳能的合理利用对社会发展与日常生活具有重大意义。为了更高效地利用太阳能,深入研究光伏系统中的最大功率点跟踪(Maximum Power Point Tracking,MPPT)技术至关重要。通过对光伏电池数学模型的分析,并结合先进的Matlab/Simulink仿真...太阳能的合理利用对社会发展与日常生活具有重大意义。为了更高效地利用太阳能,深入研究光伏系统中的最大功率点跟踪(Maximum Power Point Tracking,MPPT)技术至关重要。通过对光伏电池数学模型的分析,并结合先进的Matlab/Simulink仿真工具,可以更精准地模拟和优化光伏系统的工作状态。采用升压电路(Boost)与扰动观察法相结合的策略,能够有效跟踪光伏电池的最大功率点,提升太阳能的利用效率。展开更多
提出了一种基于Buck-Boost电路的新型均衡电路,实现了锂离子串联电池组充放电均衡。根据均衡能量流向,采取两种不同的均衡策略:电池组放电时,均衡能量由电池组向组内荷电状态(state of charge,SOC)较低的单体电池转移;电池组充电时,均...提出了一种基于Buck-Boost电路的新型均衡电路,实现了锂离子串联电池组充放电均衡。根据均衡能量流向,采取两种不同的均衡策略:电池组放电时,均衡能量由电池组向组内荷电状态(state of charge,SOC)较低的单体电池转移;电池组充电时,均衡能量由电池组中SOC较高的单体电池向电池组转移。以单体电池开路电压在线估计为基础,运用开路电压法估算SOC,选取SOC值在一定阈值范围之外的单体电池作为均衡对象,对6节串联的磷酸铁锂电池进行了充放电均衡实验。实验结果表明,该方案可以有效减小单体电池间的不一致性,提升电池组的整体性,同时提高了电池组充放电容量。展开更多
文摘Based on the analysis of the basic principle of slope compensation, a high-precision adaptive slope compensation circuit for peak current mode boost DC/DC converter is designed. The circuit dynamically detects the input and output voltage of the boost circuit to realize automatic adjustment of the compensation amount with the change of duty ratio, which makes the ramp compensation slope optimized. The design uses a high-precision subtracter to improve the accuracy of slope compensation. While eliminating sub-slope oscillation and improving the stability of boost circuit, the negative impact of compensation on boost circuit is minimized, and the load capacity and transient response speed of boost circuit are guaranteed. The circuit is designed based on SMIC 0.18um CMOS technology, with simple structure, high reliability and easy engineering implementation. Spectre circuit simulator 17.1.0.124 64b simulation results show that the circuit has high compensation accuracy and wide input and output voltage range. When the working voltage is 3.3 V, the compensation slope can be adjusted adaptively under different duty cycles, and the minimum error between the compensation slope and the theoretical optimal compensation slope is only 0.42%.
文摘太阳能的合理利用对社会发展与日常生活具有重大意义。为了更高效地利用太阳能,深入研究光伏系统中的最大功率点跟踪(Maximum Power Point Tracking,MPPT)技术至关重要。通过对光伏电池数学模型的分析,并结合先进的Matlab/Simulink仿真工具,可以更精准地模拟和优化光伏系统的工作状态。采用升压电路(Boost)与扰动观察法相结合的策略,能够有效跟踪光伏电池的最大功率点,提升太阳能的利用效率。
文摘提出了一种基于Buck-Boost电路的新型均衡电路,实现了锂离子串联电池组充放电均衡。根据均衡能量流向,采取两种不同的均衡策略:电池组放电时,均衡能量由电池组向组内荷电状态(state of charge,SOC)较低的单体电池转移;电池组充电时,均衡能量由电池组中SOC较高的单体电池向电池组转移。以单体电池开路电压在线估计为基础,运用开路电压法估算SOC,选取SOC值在一定阈值范围之外的单体电池作为均衡对象,对6节串联的磷酸铁锂电池进行了充放电均衡实验。实验结果表明,该方案可以有效减小单体电池间的不一致性,提升电池组的整体性,同时提高了电池组充放电容量。
