【摘要】 随着手机的普及、电动汽车和无线电技术的不断发展,电子产品也越来越丰富;对各种电池的充电速度和工作时间提出越来越高的要求;由于目前电池的电量工作时间较短、快速充电、远距离充电等问题不能解决,从而给人们的生活带来了极大的不便,特别限制了电动汽车工业的发展;所以针对电池的充电问题,文章设计了一款电磁谐振式无线充电器;该充电器采用STM32超低功耗单片机作为无线充电电路的主控制器,通过对发射信号频率的控制,使处于异地的输出电路工作在谐振状态,实现最大功率无线传送,接收端线圈输出再经过整流、稳压、滤波后输出+5V电压,最终经过智能控制电路给便携式设备中的锂电池充电;并通过指示灯显示电池是否正在充电、充满、电池反接和电源欠压等状态;该设计的充电设备具有使用灵活、方便、工作可靠,电能利用率高,无线充电距离远等特点,同时具有过压、过流保护,具有广泛的应用价值。更多还原

【Abstract】 Electronic products is becoming more and more abundant with the popularity of mobile phones and the continuous development of electric cars and radio technology.At the same time,the higher and higher requirements of charging rate and working time of variety batteries are put forward.Because it’s hard to solve the problems including battery’s work time is short,fast charging and charging over a long distance,it brings great inconvenience to people’s life,especially which limits the development of the electric car industry.In view of the battery charging problem,this paper designed a electromagnetic resonant wireless charger.The charger adopts the STM32 ultralow power microcontroller as the main controller of wireless charging circuit.Through controlling the emission signal frequency,the output circuit in different place works in resonant state and achieves maximum power wireless transmission.The output of receiver coil will be+5vvoltage after rectifier,regulator and filter.Ultimately,the lithium battery of portable devices will be charged by intelligent control circuit and the battery’s states including whether it is charging,full,reversed connect and the power supply voltage can be showed by Indicator light.The charging device has the characteristics of flexible,convenient,reliable work,high power utilization and wireless charging distance etc..At the same time,it has over voltage and over current protection.It has extensive application value.更多还原