水膜压力监测节点非接触供电耦合机构研究

Research on Coupling Mechanism of Contactless Power Supply System for Water Film Pressure Monitoring Node

水润滑轴承水膜压力无线监测节点同轴安装、随轴高速旋转,因此对其供电成为一大难题。针对上述问题,提出一种非接触供电方法,建立了耦合机构物理模型及其等效电路,并进行特性分析;然后,对耦合机构原、副边电路进行补偿,并对其输出功率及效率进行仿真;最后通过试验进行验证。结果表明:仿真与试验结果具有较好一致性,该耦合机构在SP补偿后平均输出功率为10.332 W,传输效率为69.84%,能够满足无线监测节点非接触供电需要。

Since the water-film pressure wireless monitoring node of water-lubricated bearing is installed coaxially and rotating with the shaft at high speed,its power supply becomes vital importance and difficult.To solve the above problems,a contactless power supply method was proposed in this study,the physical model of coupling mechanism and its equivalent circuit were established,and its characteristics were analyzed.Then,the primary and secondary side circuits of the coupling mechanism are compensated,further the output power and efficiency are simulated.Finally,it is verified by experiment.The results show that the simulation results are in good agreement with the experimental results.After SP compensation,the average output power of the coupling mechanism is 10.332 W,and the transmission efficiency is 69.84%,which can meet the requirements of contactless power supply for wireless monitoring nodes.