无线电能传输WPT(wireless power transfer)技术可在无人工辅助的条件下为无人机提供灵活便捷的电能补给,是未来无人机智能化发展的重要探索方向。为适应无人机WPT系统轻量化、恒流恒压充电、高能量传输效率等实际需求,提出了1种基于压...无线电能传输WPT(wireless power transfer)技术可在无人工辅助的条件下为无人机提供灵活便捷的电能补给,是未来无人机智能化发展的重要探索方向。为适应无人机WPT系统轻量化、恒流恒压充电、高能量传输效率等实际需求,提出了1种基于压控电容的无人机WPT系统高效率恒流/恒压输出调节方法。在系统发射线圈回路中采用压控电容作为补偿电容,通过动态调节该压控电容的等效阻抗,可在实现系统输出电流/电压有效控制的同时,保障宽负载范围条件下逆变器的软开关状态,且无需额外辅助电源及电感器件。详细分析了所提无人机WPT系统的工作原理及损耗模型,设计了1套完整的压控电容直流偏置电压调节模块、闭环控制策略及其参数设计方法。实验证明,在25.2 V-6 A的额定输出条件下,系统整体效率达88.8%。展开更多
the system to DC voltage source as the core, AT89C52 MCU as the main controller, the output voltage to set the DC power supply through the keyboard, with a step function voltage to reality, the actual output value. Th...the system to DC voltage source as the core, AT89C52 MCU as the main controller, the output voltage to set the DC power supply through the keyboard, with a step function voltage to reality, the actual output value. This design is divided into four modules： SCM control and display module, digital to analog （D/A） conversion module, a constant voltage source module, output module. MCU control module as the core, the input signal is converted to digital quantity output; constant current source module voltage D/A conversion to analog conversion into constant pressure through a constant voltage circuit. The system has good reliability, high precision.展开更多
电池充电过程一般包括先恒流再恒压2个阶段。然而,现有的无线电能传输技术WPT(wireless power transfer)在从恒流到恒压的切换过程中仍面临若干挑战,包括电池状态监测、双边通信需求及多线圈间交叉耦合问题等。为解决这些问题,提出1种...电池充电过程一般包括先恒流再恒压2个阶段。然而,现有的无线电能传输技术WPT(wireless power transfer)在从恒流到恒压的切换过程中仍面临若干挑战,包括电池状态监测、双边通信需求及多线圈间交叉耦合问题等。为解决这些问题,提出1种新颖的准CLC-LCC拓扑,该拓扑无需额外的控制方法即可实现恒流到恒压模式的平稳过渡。发射端电路采用CLC型补偿网络,使得流经发射侧线圈的电流等效为恒定电流源。二次侧电路由2个串联补偿电路并联组成,充电初期2个支路协同实现对电池的恒流充电;随着充电过程的推进,由于二极管的单向导电性,其中1个支路会被钳位断开,系统实现恒压输出。最后,搭建了1个2.6 A/105 V实验平台,验证了所提无线充电拓扑的可行性。展开更多
Optimizing photovoltaic(PV)power utilization in battery systems is challenging due to solar intermittency,battery efficiency,and lifespan management.This paper proposes a novel forecast-based battery charging manageme...Optimizing photovoltaic(PV)power utilization in battery systems is challenging due to solar intermittency,battery efficiency,and lifespan management.This paper proposes a novel forecast-based battery charging management(BCM)strategy to enhance PV power utilization.A string of Li-ion battery cells with diverse capacities and states of charge(SOC)is contemplated in this constant current/-constant voltage(CC/CV)battery-charging scheme.Significant amounts of PV power are often wasted because the CC/CV mode cannot fully exploit the available power to maintain appropriate charging rates.To address this issue,the proposed BCM algorithm selects an optimal set of battery cells for charging at any given time based on forecasted PV power generation,ensuring maximum power is obtained from the PV system.Additionally,a support vector regression(SVR)-based forecasting model is developed to predict PV power generation precisely.The results indicate that the anticipated BCM strategy achieves an overall utilization rate of 87.47%of the PVgenerated power for battery charging under various weather conditions.展开更多
文摘无线电能传输WPT(wireless power transfer)技术可在无人工辅助的条件下为无人机提供灵活便捷的电能补给,是未来无人机智能化发展的重要探索方向。为适应无人机WPT系统轻量化、恒流恒压充电、高能量传输效率等实际需求,提出了1种基于压控电容的无人机WPT系统高效率恒流/恒压输出调节方法。在系统发射线圈回路中采用压控电容作为补偿电容,通过动态调节该压控电容的等效阻抗,可在实现系统输出电流/电压有效控制的同时,保障宽负载范围条件下逆变器的软开关状态,且无需额外辅助电源及电感器件。详细分析了所提无人机WPT系统的工作原理及损耗模型,设计了1套完整的压控电容直流偏置电压调节模块、闭环控制策略及其参数设计方法。实验证明,在25.2 V-6 A的额定输出条件下,系统整体效率达88.8%。
文摘the system to DC voltage source as the core, AT89C52 MCU as the main controller, the output voltage to set the DC power supply through the keyboard, with a step function voltage to reality, the actual output value. This design is divided into four modules： SCM control and display module, digital to analog （D/A） conversion module, a constant voltage source module, output module. MCU control module as the core, the input signal is converted to digital quantity output; constant current source module voltage D/A conversion to analog conversion into constant pressure through a constant voltage circuit. The system has good reliability, high precision.
文摘电池充电过程一般包括先恒流再恒压2个阶段。然而,现有的无线电能传输技术WPT(wireless power transfer)在从恒流到恒压的切换过程中仍面临若干挑战,包括电池状态监测、双边通信需求及多线圈间交叉耦合问题等。为解决这些问题,提出1种新颖的准CLC-LCC拓扑,该拓扑无需额外的控制方法即可实现恒流到恒压模式的平稳过渡。发射端电路采用CLC型补偿网络,使得流经发射侧线圈的电流等效为恒定电流源。二次侧电路由2个串联补偿电路并联组成,充电初期2个支路协同实现对电池的恒流充电;随着充电过程的推进,由于二极管的单向导电性,其中1个支路会被钳位断开,系统实现恒压输出。最后,搭建了1个2.6 A/105 V实验平台,验证了所提无线充电拓扑的可行性。
文摘Optimizing photovoltaic(PV)power utilization in battery systems is challenging due to solar intermittency,battery efficiency,and lifespan management.This paper proposes a novel forecast-based battery charging management(BCM)strategy to enhance PV power utilization.A string of Li-ion battery cells with diverse capacities and states of charge(SOC)is contemplated in this constant current/-constant voltage(CC/CV)battery-charging scheme.Significant amounts of PV power are often wasted because the CC/CV mode cannot fully exploit the available power to maintain appropriate charging rates.To address this issue,the proposed BCM algorithm selects an optimal set of battery cells for charging at any given time based on forecasted PV power generation,ensuring maximum power is obtained from the PV system.Additionally,a support vector regression(SVR)-based forecasting model is developed to predict PV power generation precisely.The results indicate that the anticipated BCM strategy achieves an overall utilization rate of 87.47%of the PVgenerated power for battery charging under various weather conditions.
