副边无补偿的紧耦合旋转式无线供电技术

Tightly Coupled Rotary Wireless Power Supply Technology withNon-compensation on the Secondary Side

针对旋转式设备的原副边供电问题,提出一种副边无补偿的紧耦合无线供电系统。首先利用ANSYS有限元分析耦合机构的电磁屏蔽方式,解决高频线圈对信道的串扰问题。基于屏蔽后的耦合机构电磁特性,设计副边无补偿的原边串联补偿拓扑,建立补偿网络的数学模型,经推导以及仿真发现使系统工作在第2谐振点可使系统在较宽的频带内具有独立于负载的恒压特性,且易于实现零电压开关。最后搭建原理样机,实现输出功率为100 W,原副边DC-DC的电压增益为1。变负载测试结果显示输出电压增益可以在较宽负载范围内保持恒定,且装置不会对周围通信通道产生影响,由此证明所提出方法的合理性以及有效性。

In view of the problem of power supply between the primary side and the secondary side of rotating equipment,this paper proposes a tightly coupled wireless power supply(WPS)system with non-compensation on the secondary side.It firstly uses ANSYS software to analyzes the electromagnetic shielding method of the coupling mechanism so as to solve a problem of channel interference caused by high-frequency coils.Based on the electromagnetic characteristic of the shielded coupling mechanism,it designs the series compensation topology of the primary side without secondary side compensation,and establishes a mathematical model of the compensation network.Through derivation and simulation,it is found that the system working at the second resonant point has the constant voltage characteristic independent of the load in a wide frequency band,and it is easy to realize zero voltage switch.Finally,a prototype with output power of 100 W is developed,and the DC-DC voltage gain from the primary side to the secondary side is 1.The variable load test results show that the output voltage gain can hold constant in a wide range load,and the device will have no impact on the surrounding communication channels,which proves the rationality and validity of the proposed method.