摘要
提出一种非接触供电系统的新型控制方法,由ARM控制器根据输出端的功率值调整开关器件的占空比,使非接触电路的负载特性稳定;谐振直流环使开关器件工作在ZVS软开关状态;再由输入端和输出端的效率值动态调整开关器件的驱动频率,以跟踪效率的峰值点,使原边变换器输出的电压和电流同相,则开关器件又工作在ZCS软开关状态;非接触变压器的耦合系数由计算得到,ARM控制器将不同耦合系数的谐振频率以表格形式存储在非易失SRAM存储器中,在下次开机时自动进入谐振状态,实现智能控制;在耦合系数不断变化的非接触供电系统中,采用这种方法还可实现动态的高速频率跟踪;当输入电压为直流310 V,输出功率为3 kW时,效率峰值达到94%,仿真和实验的结果验明了样机的可行性。
This paper propose a new control method of contact--less energy transfer system, The full bridge current--fed soft--switched circuits are used in the system. The ARM controller adjust switch Duty cycle based on the out--put power value, make the load characteris- tics to stable. The resonant DC link causes the switch component work at the ZVS soft switch stage. Again by the input end and the out-- put efficiency value dynamically adjust switch component driving frequency, tracks the efficiency of peak point, causes voltage and electric current synchronism which the original side converter outputs, then the switch component works in the ZCS soft switch condition. The cou- pling coefficient of contact--less transform is obtained by the computation, the ARM controller saves the frequency control related result by the data sheet form in the Nonvolatile SRAM, when next time starting enters the resonant condition automatically realizes intelligence con- trol. Changes unceasingly in the coupling coefficient in the contact--less power supply system, uses this method also to be possible to realize the dynamic high speed frequency track. When input voltage for directs current 310V, when the output is 3KW, the efficiency peak value a- chieves 94M, the simulation and the experimental result have verified the prototypical feasibility.
出处
《计算机测量与控制》
北大核心
2014年第2期630-632,635,共4页
Computer Measurement &Control
基金
河南省科技厅重点科技攻关项目(122102310443
112102310556)
