摘要：高频感应加热校平机能够高效率地加热材料，并对材料进行较平。它能够机械化作业以减少人工成本，以及造成的环境污染极小，因此在船板校平领域受到了大量公司的欢迎，具有广阔的应用前景。

在船板校平的领域中，由于施工面积相对其他领域较大，感应加热校平机的作业半径最长可能需要达到30米左右，但是由于高频交流电具有趋肤效应，导致前端同轴变压器及感应加热器在进行校平作业时会产生大量的热量，严重时甚至会损坏电源。所以校平机作业是对于冷却系统要求较高。而且超长的距离会导致功率损耗十分严重，即使不计功率成本，机器的工作效率以及工作能力都会被大大削弱，严重时会使较平工作完全无法正常进行。本文将着重于对谐振电路进行优化改良设计，并对远距离传输的功率损耗问题进行研究。

本文深入对比分析了串联谐振电源和并联谐振电源的工作原理以及它们的各自的工作状态，并通过比较两者的优劣，最终选择串联谐振电路来进行电路设计，从而设计出适用于感应加热校平机远距离作业的串联谐振拓扑结构。串联谐振的方式由电压源供电，远距离传输消耗更低，结构相对较为简单，控制较为方便，调节十分灵活，而且电路对外界干扰不敏感，省去了抗干扰的成本。对于船板焊接来说是一种较为理想的电路结构，极大地改善了远距离传输的功率损耗问题。

最后本文对样机进行了实际测试，所得波形与采用模拟仿真软件MATLAB/Simulink测得波形相符，电路输出效率相比原版高出不少，设计符合要求。利用样机进行工艺试验以检验校平效果，并绘制出不同功率下钢板升温的曲线。

关键词：高频感应；功率延伸；串联谐振；同轴电缆；同轴变压器

Abstract：High frequency induction heating leveling machine can efficiently heat the material and make the material flat. It can mechanize the operation to reduce labor costs, as well as the resulting environmental pollution is minimal, so in the field of ship plate leveling by a large number of companies welcome, with broad application prospects.

In the field of shipboard leveling, the operating radius of the induction leveling machine may be about 30 meters long due to the relatively large construction area relative to other areas, but the high-frequency alternating current has a skin effect, resulting in a front-end coaxial transformer And induction heaters in the leveling operation will produce a lot of heat, serious damage to the power even. So the leveling machine is required for the cooling system is higher. And the long distance will lead to power loss is very serious, even without power costs, the machine's work efficiency and ability to work will be greatly weakened, serious will make the flat work completely unable to normal. This paper will focus on the optimization of the resonant circuit to improve the design, and long-distance transmission of power loss issues to study.

In this paper, the working principle of series resonant power supply and parallel resonant power supply and their respective working states are analyzed in depth, and the circuit design is selected by comparing the advantages and disadvantages of the two, and then the circuit is designed for induction heating Series Resonant Topology of Long Machine Operation. Series resonant way by the voltage source power supply, long-distance transmission consumption is lower, the structure is relatively simple, more convenient control, regulation is very flexible, and the circuit is not sensitive to external interference, eliminating the need for anti-interference costs. It is an ideal circuit structure for ship plate welding, which greatly improves the power loss of long distance transmission.

Finally, this paper has carried on the actual test to the prototype, the obtained waveform coincides with the waveform which is simulated by MATLAB / Simulink, and the circuit output efficiency is much higher than the original design. Using the prototype to test the process to test the leveling effect, and draw a different power under the plate temperature curve.