Design of wireless energy transmission device for power ultrasonic machining
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摘要: 数控机床功率超声加工通过将高频轴向超声振动叠加在旋转刀具上，能够有效降低切削力，适用于加工各类特种材料。传统的超声加工系统通常通过接触式滑环进行供电，该供电方式存在电刷容易磨损、互换性不强等缺点。通过设计基于非接触式变压器的无线传能供电装置，设计变压器原副边的补偿电路，并采用Maxwell软件对其进行了电磁仿真，研究了气隙对传输效率的影响，最后实验验证该数控加工装置的性能。结果表明，电能传输效率随气隙的增大而减小，该补偿电路设计能有效提升数控机床超声加工刀具的振动性能。Abstract: The power ultrasonic machining of CNC machine tools can effectively reduce the cutting force by superimposing high-frequency axial ultrasonic vibration on the rotating tool. It is suitable for processing all kinds of special materials. The traditional ultrasonic machining system is usually powered by a contact slip ring, which has disadvantages such as easy wear of the brush and poor interchangeability. By designing a wireless power supply device based on a non-contact transformer and a compensation circuit on the primary and secondary sides of the transformer, and using Maxwell software to carry on electromagnetic simulation to it. The influence of the air gap on the transmission efficiency is studied, and the performance of the CNC machining system is finally verified by experiments. The results show that the power transmission efficiency decreases with the increase of the air gap, and the compensation circuit design can effectively improve the vibration performance of the ultrasonic machining tool of the CNC machine tool.
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Key words:
- wireless energy transmission /
- loosely coupled transformer /
- Maxwell
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表 2 绕组仿真工作参数值
参数名称 参数值 原边激励电压U/V 100 工作频率f/Hz 20 000 气隙/mm 0~3 轴心偏差/mm 0~4 原边线圈匝数N1 40 副边线圈匝数N2 44 原边线圈电阻R1 /Ω 1 副边负载阻抗Z2 /Ω 80 
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