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High-Performance Constant Current Triboelectric Nanogenerator for Wind Energy Harvesting and Air Purification 认领 引用
1
作者 Xingming Tao Tingyu Wang +5 位作者 Liming Tan Fan Xu Ai Chen Yuchen Yang Renyun Zhang Xue Wang 《SmartSys》 2025年第4期30-39,共10页
Effective wind energy harvesting represents a viable solution to the global energy shortage and environmental pollution.Triboelectric nanogenerators(TENGs)hold great potential in wind energy harvesting;yet,there is li... Effective wind energy harvesting represents a viable solution to the global energy shortage and environmental pollution.Triboelectric nanogenerators(TENGs)hold great potential in wind energy harvesting;yet,there is little research on constant current TENGs for this purpose.Herein,a novel rotary bicharacteristic current TENG(R-BC-TENG)with constant current output for ambient wind energy harvesting is proposed,which delivers a low crest factor of 1.0187.Through the synergistic integration of triboelectrification,electrostatic discharge,and electrostatic induction,an average power density of 2.4 W m−2 Hz−1 and a charge density of 1.86 mC m−2 for the R-BC-TENG are achieved,with the charge density surpassing that reported in most previous studies.The minimum starting wind speed of R-BC-TENG is as low as 2.8 m s−1 while maintaining 100%performance after 12,700 cycles.Moreover,a self-powered air purification system,based on the R-BC-TENG,is developed,with the ability to generate 1,400,000 ions cm−3 and settle dust within 50 s.This work provides a paradigm for harvesting wind energy to achieve constant current output as well as safe and efficient air purification. 展开更多
关键词 air purification constant current triboelectric nanogenerator wind energy harvesting
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Dynamics and stabilization of peak current-mode controlled buck converter with constant current load 认领 引用 被引量：3
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作者 冷敏瑞 周国华 +1 位作者 张凯暾 李振华 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第10期101-109,共9页
The discrete iterative map model of peak current-mode controlled buck converter with constant current load（CCL）,containing the output voltage feedback and ramp compensation, is established in this paper. Based on th... The discrete iterative map model of peak current-mode controlled buck converter with constant current load（CCL）,containing the output voltage feedback and ramp compensation, is established in this paper. Based on this model the complex dynamics of this converter is investigated by analyzing bifurcation diagrams and the Lyapunov exponent spectrum. The effects of ramp compensation and output voltage feedback on the stability of the converter are investigated. Experimental results verify the simulation and theoretical analysis. The stability boundary and chaos boundary are obtained under the theoretical conditions of period-doubling bifurcation and border collision. It is found that there are four operation regions in the peak current-mode controlled buck converter with CCL due to period-doubling bifurcation and border-collision bifurcation. Research results indicate that ramp compensation can extend the stable operation range and transfer the operating mode, and output voltage feedback can eventually eliminate the coexisting fast-slow scale instability. 展开更多
关键词 buck converter constant current load discrete iterative map model ramp compensation
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Multi-stage constant current charging strategy considering SOC intervals and voltage thresholds 认领 引用 被引量：2
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作者 Yu Zhang Si Xu Tiezhou Wu 《Global Energy Interconnection》 EI CSCD 2022年第2期143-153,共11页
Conventional multi-stage constant current charging strategies often use higher multiples of current to charge the battery in pursuit of shorter charging times.However,this leads to an increase in battery temperature,w... Conventional multi-stage constant current charging strategies often use higher multiples of current to charge the battery in pursuit of shorter charging times.However,this leads to an increase in battery temperature,while shortening the charging time.This in turn affects the safety of the charging process.Furthermore,the higher charging currents are not ideal for shortening the charging time in the later stages of charging.To solve the aforementioned problems,in this study,a multi-stage constant current charging strategy is presented.This strategy can shorten the battery charging time by using the increase in battery temperature during the charging process as a constraint,using a genetic algorithm to calculate the charging current value,and investigating the phased approach to charging.Finally,the charging strategy is experimentally validated at different ambient temperatures and different initial SOCs.The experimental results show that the charging strategy proposed in this paper not only reduces the amount of calculations,but also reduces the temperature rise by up to 46.4%and charging time by up to 4.2%under different operating conditions. 展开更多
关键词 Charging time Battery temperature rise Genetic algorithm Multi-stage constant current charging
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Field-induced phase transitions in chiral smectic liquid crystals studied by the constant current method 认领 引用 被引量：2
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作者 H Dhaouadi R Zgueb +2 位作者 O Riahi F Trabelsi T Othman 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第5期373-379,共7页
In ferroelectric liquid crystals, phase transitions can be induced by an electric field. The current constant method allows these transition to be quickly localized and thus the（E, T） phase diagram of the studied pr... In ferroelectric liquid crystals, phase transitions can be induced by an electric field. The current constant method allows these transition to be quickly localized and thus the（E, T） phase diagram of the studied product can be obtained.In this work, we make a slight modification to the measurement principles based on this method. This modification allows the characteristic parameters of ferroelectric liquid crystal to be quantitatively measured. The use of a current square signal highlights a phenomenon of ferroelectric hysteresis with remnant polarization at null field, which points out an effect of memory in this compound. 展开更多
关键词 chiral smectic liquid crystal constant current method ferroelectric polarization dielectric permittivity
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Sustaining the driving force:Constant-voltage charging unlocks rapid and efficient Li-CO2 batteries 认领 引用
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作者 Wenqing Ma Mingjuan Gao +10 位作者 Jianping Ma Haiyang Gao Xianhong Li Siyu Liu Tianzhen Jian Yuyan Wang Longhua Ding Aizhu Wang Lihan Cai Xin Yu Hong Liu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第6期680-693,I0016,共14页
The large charging overpotential and sluggish kinetics of Li-CO2 batteries originate from both the high energy barrier for decomposing insulating discharge products and the mismatch between constantcurrent charging... The large charging overpotential and sluggish kinetics of Li-CO2 batteries originate from both the high energy barrier for decomposing insulating discharge products and the mismatch between constantcurrent charging and dynamic reaction kinetics.While cathode catalyst design dominates research,charging protocol optimization remains a critically underexplored avenue.Herein,we demonstrate that a constant-voltage(CV)charging strategy,as opposed to the conventional constant-current(CC)mode,dramatically enhances the charging rate,energy efficiency,and cyclability.Using a Ru@rGO cathode,the 4.0 V CV-charging protocol CV charging is identified as optimal,enabling rapid charging(~13.6 min),high energy efficiency of 72%,and stable cycling over 200 cycles.In-situ differential electrochemical mass spectrometry reveals rapid and efficient CO2 evolution kinetics under the 4.0 V CVcharging mode.Combined with X-ray photoelectron spectroscopy and Raman mapping,it is shown that this protocol ensures near-complete decomposition of both Li2 CO3 and Li2C2O4,whereas CC-charging and suboptimal CV-charging protocols leave significant residues or induce severe parasitic reactions.This work establishes CV-charging as an effective strategy to overcome the kinetic limitations of Li-CO2 batteries for a specific configuration,and provides a framework for optimizing charging protocols across battery systems. 展开更多
关键词 Constant current charging Constant voltage charging Operation protocol Li-CO2battery Energy efficiency
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Electrochemical-thermal-mechanical coupling model considering lithium plating for multi-stage constant current fast charging of lithium-ion batteries 认领 引用
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作者 Yuguang Li Yudong Shen +2 位作者 Xueyuan Wang Xuezhe Wei Haifeng Dai 《Chain》 2025年第2期148-163,共16页
Lithium plating has been identified as the main form of failure in fast charging,so it is imperative to develop effective methods for detecting lithium plating.Experimental results validated the effectiveness of lithi... Lithium plating has been identified as the main form of failure in fast charging,so it is imperative to develop effective methods for detecting lithium plating.Experimental results validated the effectiveness of lithium plating detection via expansion force measurement.While multi-stage constant current(MCC)charging is a common form of fast charging,experimental investigations of lithium plating under MCC charging remain scarce,particularly lacking models to describe the battery expansion force changes during the lithium plating process under MCC conditions.The expansion of batteries during charging is caused by factors such as intercalation reactions,thermal expansion,and lithium plating.Through the establishment of the coupling model,the expansion displacement of the battery is calculated.The thermal expansion coefficient and equivalent stiffness of the battery are obtained through experiments,which are used to calculate the battery expansion force.Additionally,the battery overpotential is calculated through the model to determine the impact of lithium plating on the expansion force.The model investigates the effects of lithium plating on battery expansion force under different C-rates during constant current and MCC charging processes,achieving semi-quantitative prediction of battery expansion force under MCC charging and providing model-based optimization directions for MCC charging strategies.This work provides valuable insights for battery modeling and charging strategy optimization in terms of expansion force modeling under multi-stage constant current charging. 展开更多
关键词 lithium-ion battery lithium plating coupling model expansion force multi-stage constant current
A stepless-power-reconfigurable converter for a constant current underwater observatory 认领 引用 被引量：1
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作者 Yujia ZANG Yanhu CHEN +3 位作者 Canjun YANG Haoyu ZHANG Zhiyong DUAN Gul MUHAMMAD 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2021年第12期1625-1640,共16页
The conversion from constant current(CC)to constant voltage(CV)is one of the key technologies of CC underwater observatory systems.A shunt regulator with high stability and high reliability is usually used.Application... The conversion from constant current(CC)to constant voltage(CV)is one of the key technologies of CC underwater observatory systems.A shunt regulator with high stability and high reliability is usually used.Applications,however,are limited by high heat dissipation and low efficiency.In this paper,with an improved shunt regulation method,a novel concept of stepless power reconfiguration(SPR)for the CC/CV module is proposed.In cases with stable or slowly changing load,two modes of CC/CV conversion are proposed to reduce unnecessary power loss of the shunt regulator while being able to retain any operatorpreset power margin in the system:(1)the manual SPR(MSPR)method based on single-loop control method;(2)the automatic SPR(ASPR)method based on inner-outer loop control method.The efficiency of the system is analyzed.How to select some key parameters of the system is discussed.Experimental results show that MSPR and ASPR are both effective and practical methods to reduce heat dissipation and improve the efficiency of the CC/CV module,while the high stability of the shunt regulator remains. 展开更多
关键词 Constant current to constant voltage(CC/CV)conversion Shunt regulator Stepless power configuration Underwater observatory
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Non-inverting buck-boost DC-DC converter based on constant inductor current control 认领 引用
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作者 Yao Suyi Jiang Jianguo 《Journal of Southeast University(English Edition)》 EI CAS 2021年第2期171-176,共6页
The hysteresis control combined with PWM control non-inverting buck-boost was proposed to improve the light load efficiency and power density.The constant inductor current control(CICC)was established to mitigate the ... The hysteresis control combined with PWM control non-inverting buck-boost was proposed to improve the light load efficiency and power density.The constant inductor current control(CICC)was established to mitigate the dependence on the external components and device variation and make smooth transition between hysteresis control loop and pulse width modulation(PWM)control loop.The small signal model was deduced for the buck and boost operation mode.The inductor current slope control(ICSC)was proposed to implement the automatic mode transition between buck and boost mode in one switching cycle.The results show that the converter prototype has good dynamic response capability,achieving 94%efficiency and 95%peak efficiency at full 10 A load current. 展开更多
关键词 four switch buck-boost converter inductor current slope control constant inductor current control small signal model
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Constant Ripple Current Control for Switching DC-DC Converter 认领 引用
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作者 Gwo-Tarng Chern Jenn-Jong Shieh 《Journal of Energy and Power Engineering》 CAS 2012年第9期1437-1441,共5页
The adapted DC-DC converters should be smaller in size and have a small output current ripple to meet the increasing demand for low voltages with high performance and high density micro processors for several microele... The adapted DC-DC converters should be smaller in size and have a small output current ripple to meet the increasing demand for low voltages with high performance and high density micro processors for several microelectronic load applications. This paper proposes a DC-DC converter using variable on-time and variable switching frequency control enhanced constant ripple current control and reduced magnetic components. The proposed converter is realized by making the turn-offtime proportional to the on-time of the converter, according to the input and output voltage, thereby reducing the corresponding current ripple on output voltage in the continuous conduction mode. A Buck DC-DC converter using the proposed control strategy is analyzed in detail, along with some experimental results to show the performance and effectiveness of this converter. 展开更多
关键词 Constant ripple current DC-DC converter variable switching frequency continuous conduction mode indirect currentsensor magnetic component.
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基于控制可变电容的恒流/恒压输出WPT系统研究 认领 引用 被引量：1
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作者 寇志伟 刘焱晨 +3 位作者 马蕴文 崔啸鸣 刘利强 齐咏生 《电机与控制学报》 EI CSCD 北大核心 2026年第5期175-188,共14页
磁耦合无线电能传输(magnetic coupling wireless power transfer,MC-WPT)技术通过近磁场强耦合的方式实现电能的非接触式传输,为动态充电和复杂环境供电开辟新路径。为了适应MC-WPT系统输出电压/电流与负载解耦、恒流/恒压模式自动切... 磁耦合无线电能传输(magnetic coupling wireless power transfer,MC-WPT)技术通过近磁场强耦合的方式实现电能的非接触式传输,为动态充电和复杂环境供电开辟新路径。为了适应MC-WPT系统输出电压/电流与负载解耦、恒流/恒压模式自动切换的实际需求,提出一种基于可变电容的恒流/恒压输出自动切换方法。首先,引入谐振因子m和n,设计基于可变电容的双边LCC谐振网络,理论分析恒流/恒压输出的可行性,实现双边LCC网络接收侧等效电容的连续调谐。其次,研究双边LCC谐振网络的参数选择与优化方法,分析谐振因子变化规律与范围,设计基于PID的等效电容控制方案,确定输出恒流/恒压模式的自动切换控制方法。最后,通过仿真和实验测试验证系统参数设计的正确性、恒流/恒压输出特性以及自动切换性能。实验结果表明,该系统在输入电压恒定时的不同负载工况下分别实现了3 A的恒流输出与15 V的恒压输出以及恒流/恒压输出的自动切换,动态响应的波动率分别为6.67%与5.33%,最大传输效率达到85.17%,为无线充电的智能化与适应性提升提供了新的技术方案。 展开更多
关键词 磁耦合无线电能传输 恒流 恒压 可变电容 谐振因子 自动切换
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一种基于恒流充电阶段电压数据的锂离子电池健康状态估计模型 认领 引用
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作者 巫春玲 刘博洋 +3 位作者 洪吉超 黄敬云 孟锦豪 王科 《工程科学学报》 EI CAS CSCD 北大核心 2026年第5期1170-1182,共13页
为满足储能系统电池管理中健康状态(State of health,SOH)估计算法兼顾高精度与轻量化的需求,本文提出了一种基于局部电压拟合(Local voltage fitting,LVF)的SOH估计方法.该方法以等效电路模型为理论基础,建立恒流充电阶段电压与时间的... 为满足储能系统电池管理中健康状态(State of health,SOH)估计算法兼顾高精度与轻量化的需求,本文提出了一种基于局部电压拟合(Local voltage fitting,LVF)的SOH估计方法.该方法以等效电路模型为理论基础,建立恒流充电阶段电压与时间的映射关系模型,并通过非线性拟合实现对SOH的直接求解.基于18650型磷酸铁锂(LiFePO4)电池的循环寿命实验数据结果表明,LVF模型在无需完整充电曲线的情况下即可实现高精度SOH估计,均方根误差(Root mean square error,RMSE)为1.249×10-3,最大相对误差(Max relative error,MRE)为9.489×10-3,平均绝对百分比误差(Mean absolute percentage error,MAPE)为0.1037%.与BP(Back propagation)神经网络和梯度提升回归树模型相比,LVF的RMSE降低了83.12%和79.12%,且计算时间相较于二者缩短了84.60%和56.05%.在同济大学公开的NCM电池数据集上验证表明,LVF模型在不同电池体系与一致性条件下均能保持稳定估计性能,RMSE约为4.856×10-3,MRE约为1.87×10-2,MAPE约为0.3231%.综上,所提出的LVF模型兼具高精度、低复杂度和广泛适用性,为储能电池健康评估与梯次利用提供了一种高效、可解释的建模思路. 展开更多
关键词 锂离子电池 健康状态估计 等效电路模型 恒流充电 曲线拟合 循环实验
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Robust Nonlinear Current Sensorless Control of the Boost Converter with Constant Power Load 认领 引用
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作者 Said Oucheriah Abul Azad 《Circuits and Systems》 2024年第3期29-43,共15页
The boost converter feeding a constant power load (CPL) is a non-minimum phase system that is prone to the destabilizing effects of the negative incremental resistance of the CPL and presents a major challenge in the ... The boost converter feeding a constant power load (CPL) is a non-minimum phase system that is prone to the destabilizing effects of the negative incremental resistance of the CPL and presents a major challenge in the design of stabilizing controllers. A PWM-based current-sensorless robust sliding mode controller is developed that requires only the measurement of the output voltage. An extended state observer is developed to estimate a lumped uncertainty signal that comprises the uncertain load power and the input voltage, the converter parasitics, the component uncertainties and the estimation of the derivative of the output voltage needed in the implementation of the controller. A linear sliding surface is used to derive the controller, which is simple in its design and yet exhibits excellent features in terms of robustness to external disturbances, parameter uncertainties, and parasitics despite the absence of the inductor’s current feedback. The robustness of the controller is validated by computer simulations. 展开更多
关键词 Boost Converter Robust Sliding Mode Control Constant Power Load (CPL) Current-Sensorless Control Extended State Observer
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基于反向串联耦合线圈的水下航行器抗偏移充电系统研究 认领 引用
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作者 梁晨旭 赵成 +2 位作者 袁欢 王小华 荣命哲 《电工技术学报》 EI CSCD 北大核心 2026年第14期4687-4705,共19页
自主水下航行器对于水下资源勘探、远洋开发等领域的发展具有非常重要的应用价值。受限于水下作业环境的特殊性,无线电能传输技术可以有效避免有线电气接触带来的短路风险,但发射和接收线圈间会产生轴向和旋转偏移的现象。针对自主水下... 自主水下航行器对于水下资源勘探、远洋开发等领域的发展具有非常重要的应用价值。受限于水下作业环境的特殊性,无线电能传输技术可以有效避免有线电气接触带来的短路风险,但发射和接收线圈间会产生轴向和旋转偏移的现象。针对自主水下航行器无线充电系统因偏移导致的传输功率和效率下降问题,该文从补偿网络设计、耦合机构设计及系统控制三个方面展开研究。首先,提出一种基于LCC/S/S混合补偿网络与双路并联整流桥的电路拓扑结构,该结构在谐振状态下具有负载无关的恒压传输特性。其次,设计了一种基于反向串联同轴螺线管线圈的新型耦合机构,在360°旋转偏移时互感波动极小,且在轴向偏移距离达到整体尺寸75%时,等效互感波动仅为10.2%,表现出优异的抗偏移性能。此外,采用基于电压电流双环竞争控制策略的同步Buck变换器,实现了系统的恒流恒压输出。最后,通过实验验证,系统在±132 mm轴向偏移范围内,整流输出电压波动仅为9.7%,最高直流传输效率达95.1%,整体效率为90.3%。该文所设计的系统在抗偏移能力和效率方面均表现出显著的优势,具备较高的工程应用价值。 展开更多
关键词 自主水下航行器 无线电能传输 耦合机构 抗偏移 恒压恒流
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±800 kV直流高速开关(HSS)直流电弧烧蚀试验研究 认领 引用
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作者 张长虹 吕金壮 +10 位作者 夏谷林 谭盛武 龙启 孙珂珂 彭茂兰 李一帆 卢文浩 侯明春 黄瑜珑 刘英英 彭翔 《高压电器》 CAS CSCD 北大核心 2026年第5期101-110,共10页
直流高速开关HSS是多端直流输电系统中的关键设备,需要具有耐受长时间直流电弧烧蚀能力。文中根据±800 kV混合多端高压直流输电工程中直流高速开关HSS的运行工况和产品特点,提出了一种HSS长时间直流电弧烧蚀试验的开关电源恒流方法... 直流高速开关HSS是多端直流输电系统中的关键设备,需要具有耐受长时间直流电弧烧蚀能力。文中根据±800 kV混合多端高压直流输电工程中直流高速开关HSS的运行工况和产品特点,提出了一种HSS长时间直流电弧烧蚀试验的开关电源恒流方法,设计了开关电源恒流的直流大电流试验电路。文中介绍了试验电路中主要设备的技术参数和器件选型,并基于大功率电力电子开关器件IGBT,搭建了试验回路,进行了HSS长时间直流电弧的烧蚀试验。样机的烧蚀试验结果表明,文中所提出的试验方法是可行的。基于试验结果,提出了800 kV等级HSS产品的喷口和弧触头材料选型建议。 展开更多
关键词 直流高速开关(HSS) 直流电弧烧蚀 样机试验 混合多端直流输电工程 开关电源恒流法
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双LCC双负载无线电能传输特性研究及参数优化 认领 引用
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作者 王允建 曹晨伟 +2 位作者 李世浩 孙星 张昌杰 《电子器件》 CAS 2026年第1期56-62,共7页
为了提高双负载WPT系统的传输性能,提出了双恒流工作模式下的LCC-LCC型双负载WPT系统,分析了该系统的传输功率和传输效率及其接收回路间互感耦合对传输性能的影响。同时针对该系统参数较多、匹配难度大难以兼顾高输出功率和高传输效率... 为了提高双负载WPT系统的传输性能,提出了双恒流工作模式下的LCC-LCC型双负载WPT系统,分析了该系统的传输功率和传输效率及其接收回路间互感耦合对传输性能的影响。同时针对该系统参数较多、匹配难度大难以兼顾高输出功率和高传输效率的问题,提出了系统参数的粒子群(PSO)优化并进行了仿真验证;仿真结果表明优化系统参数可以兼顾98.42%的传输效率,使其总输出功率较优化前提高3倍多。最后,对该系统两输出端双恒流特性和两接收回路相互干扰特性进行研究,结果验证了所提系统的有效性。 展开更多
关键词 双负载无线电能传输 LCC-LCC补偿拓扑 参数优化 双恒流工作模式
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不对称半桥LED恒流源数字自适应低频纹波补偿控制 认领 引用
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作者 乔之勇 王顺利 +1 位作者 张楠 刘知贵 《电源学报》 CSCD 北大核心 2026年第1期109-123,共15页
为兼顾大功率LED光源对长寿命、高效率、低纹波和智能化等性能指标的要求,在深入分析无电解化Boost不对称半桥AHB(asymmetric half-bridge)变换器LED恒流源低频二次纹波补偿特性的基础上,提出了基于数字预测电流模式的AHB LED恒流源自... 为兼顾大功率LED光源对长寿命、高效率、低纹波和智能化等性能指标的要求,在深入分析无电解化Boost不对称半桥AHB(asymmetric half-bridge)变换器LED恒流源低频二次纹波补偿特性的基础上,提出了基于数字预测电流模式的AHB LED恒流源自适应低频纹波补偿控制算法。MATLAB仿真结果表明,所提出的控制算法能自适应输入电压和负载的变化,在整个调光范围均能有效减小流经LED的低频二次纹波电流。 展开更多
关键词 LED恒流源 不对称半桥变换器 无电解电容 自适应低频纹波补偿控制 数字预测电流模式
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Neural network prediction of the shunt current in resistance spot welding 认领 引用
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作者 张勇 谢红霞 +3 位作者 滕辉 白华 鄢君辉 汪帅兵 《China Welding》 EI CAS 2013年第3期73-78,共6页
An error back propagation （BP） neural network prediction model was established for the shunt current compensation in series resistance spot welding. The input variables for the neural network consist of the resistiv... An error back propagation （BP） neural network prediction model was established for the shunt current compensation in series resistance spot welding. The input variables for the neural network consist of the resistivity of the material, the thickness of workpiece and the spot spacing, and the shunt rate is outputted. A simplified calculation for the shunt rate was presented based on the feature of the constant-current resistance spot welding and the variation of the resistance in resistance spot welding process, and then the data generated by simplified calculation were used to train and adjust the neural network model. The neural network model proposed was used to predict the shunt rate in the spot welding of 20# mlid steel （in Chinese classification） （in 2. 0 mm thickness） and 10# mild steel （in 1.5 mm and 1.0 mm thickness）. The maximum relative prediction errors are, respectively, 2. 83%, 1.77% and 3.67%. Shunt current compensation experiments were peoCormed based on the neural network prediction model proposed to check the diameter difference of nuggets. Experimental results show that maximum nugget diameter deviation is less than 4% for both 10# and 20# mlid steels with spot spacing of 30 mm and 50 mm. 展开更多
关键词 resistance spot welding constant current control shunt current neural network prediction model nugget
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具有抗偏移特性的LCC-LC/S补偿式无线充电系统 认领 引用
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作者 赵浛宇 刘佳兵 +1 位作者 安玉涛 崔皓添 《传感器与微系统》 北大核心 2026年第7期91-97,共7页
为保证无线充电系统在偏移环境下进行稳定高效的充电,提出一种具有抗偏移特性的LCC-LC/S补偿式无线充电系统,该系统无需原、副边通信且所需元件少,具有较好的抗偏移效果。首先,依据二端口网络对补偿网络构造方法进行优化设计,使系统在... 为保证无线充电系统在偏移环境下进行稳定高效的充电,提出一种具有抗偏移特性的LCC-LC/S补偿式无线充电系统,该系统无需原、副边通信且所需元件少,具有较好的抗偏移效果。首先,依据二端口网络对补偿网络构造方法进行优化设计,使系统在偏移环境下依然具有与负载无关的恒定输出增益及零相角(ZPA)特性;然后,提出一种LCC-LC/S变结构补偿网络,分析系统在不同模式下的参数配置条件及输出特性;其次,通过对系统恒流—恒压切换点进行分析,实现系统的平滑切换;最后,搭建仿真模型,通过与目前研究较多的串联—串联/并联(S-S/P)网络进行对比,突出该系统具有良好的抗偏移特性,验证了所提系统的正确性。 展开更多
关键词 无线充电系统 参数优化设计 LCC-LC/S拓扑 恒流-恒压充电
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一种穿戴式大鼠闭环迷走神经刺激系统的设计 认领 引用
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作者 刘珂舟 张淏渝 +2 位作者 陈桢 张恒斐 何晓朋 《航天医学与医学工程》 2026年第3期284-290,共7页
目的开发一种适用于自由移动大鼠的穿戴式闭环迷走神经刺激系统,以肢体运动作为门控信号调节迷走神经刺激的释放,实现闭环控制。迷走神经刺激与大鼠肢体康复训练联动,推进其在大鼠脑卒中康复模型的系统性研究。方法系统由迷走神经刺激... 目的开发一种适用于自由移动大鼠的穿戴式闭环迷走神经刺激系统,以肢体运动作为门控信号调节迷走神经刺激的释放,实现闭环控制。迷走神经刺激与大鼠肢体康复训练联动,推进其在大鼠脑卒中康复模型的系统性研究。方法系统由迷走神经刺激器和闭环控制器构成,两部分通过红外技术进行通讯,闭环控制器采用压力检测将大鼠前肢压杆信号转化为迷走神经刺激的触发信号,并调整输出参数,控制刺激器输出预设参数的双相恒流脉冲序列,实现大鼠压杆训练与迷走神经刺激同步。结果迷走神经刺激器尺寸:36 mm×32 mm×8 mm,重量:12.4 g(包含电池)。实验测试表明该系统可实现迷走神经刺激与压杆运动时序配对的闭环控制,并支持参数(电流幅值、脉冲宽度、频率、序列时长)可编程的双相恒流脉冲输出,针对1~10 kΩ的动态负载范围,刺激器具备稳定的恒流输出能力,输出偏差最大值不超过3.1%。结论系统可用于大鼠脑卒中康复模型的实验研究,评估迷走神经刺激对大鼠脑卒中康复的有效性并探究二者最优的结合方案。 展开更多
关键词 迷走神经刺激 闭环控制 双相恒流脉冲 脑卒中康复
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危险溶剂自动摇匀与恒流加注装置设计与实验研究 认领 引用
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作者 唐术锋 张海鹏 +3 位作者 常宏 柴智杰 郭晓栋 王鑫 《内蒙古工业大学学报（自然科学版）》 2026年第3期205-212,共8页
针对一些在倾倒前需要混匀的危险浊液,为满足将危险浊液精确地定量倾倒进加注容器的需求,设计了一种危险溶剂自动摇匀与恒流加注装置。通过数学建模,找到了倾倒转角和瓶内液体体积的关系,应用数学软件获得了瓶内体积和倾倒转角的曲线,... 针对一些在倾倒前需要混匀的危险浊液,为满足将危险浊液精确地定量倾倒进加注容器的需求,设计了一种危险溶剂自动摇匀与恒流加注装置。通过数学建模,找到了倾倒转角和瓶内液体体积的关系,应用数学软件获得了瓶内体积和倾倒转角的曲线,并研发了自动摇匀与恒流加注系统。该系统通过控制瓶子倾转角度来间接控制液体流出,通过绝对式编码器监测倾倒角度以及使用三点式称重传感器测量瓶内剩余液体的质量,进行双闭环控制。实验验证了该装置可实现恒流定量加注液体功能的有效性,达到了加注液体±1 g的精度要求,避免了烫伤烧伤现象的发生。 展开更多
关键词 危险溶剂 自动摇匀 恒流加注 数学建模
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