摘要
提高电能传输效率是无线电能传输系统的核心问题。研究了在变负载条件下稳定感应电能传输(IPT)系统的传输效率和功率的方法。在对IPT系统电路模型进行分析的基础上,得到系统效率最优时的负载条件。在整流桥输出端和电池负载之间加人Boost变换器。当负载阻值变动时,通过调节Boost变换器的占空比使系统等效负载始终维持在最优负载值。为了给出占空比参数的调节规律,对Boost变换器电流连续模式(CCM)和电流断续模式(DCM)这两种工作模式下的阻抗特性进行分析,最终给出了最优占空比计算表达式。仿真和试验证明了Boost变换器可以在较大的负载变化范围内实现最大效率传输。该技术也可应用于无线充电汽车或者植入式医疗设备等领域。阻抗匹配方法可以跟踪负载变化并进行调节,具有较高的应用价值。
Improving the power transmission efficiency is the core problem of radio energy transmission system.The transmission efficiency and power of stable inductive power transfer(IPT)system under variable load condition are studied.Based on the analysis of the circuit model of IPT system,the load condition of optimal system efficiency is obtained.The Boost converter is added betveen the output end of the rectifier bridge and the battery load.When the load resistance changes,the duty ratio of the Boost converter is adjusted so that the equivalent load of the system is always maintained at the optimal load value.In order to give.the regulation law of duty cycle parameters,the impedance characteristics of Boost converter in continuous current mode(CCM)and discontinuous current mode(DCM)are analyzed,and the optimal duty cycle calculation expression is given.Simulation and experiments show that Boost converter can achieve maximum efficiency transmission over a wide range of load changes.This technology is also applied in fields such as wirelessly charged vehicles or implantable medical devices,etc.The impedance matching method can track load changes and adjust,which has high application value.
作者
杨勇
YANG Yong(Zhejiang Zheneng Wenzhou Power Plant Co.,Ltd.,Wenzhou 325602,China)
出处
《自动化仪表》
CAS
2020年第12期56-59,共4页
Process Automation Instrumentation
关键词
BOOST变换器
无线电能传输
阻抗匹配
最大效率传输
巡检机器人
负载阻值变动
最优负载
占空比调节
Boost converter
W ireless power transmission
Impedance matching
Maximum efficiency transmission
Inspection robot
Load resistance change
Optimal load
Duty cycle adjustment
