基于固态变压器的同步双频感应加热电源研究

Research on Synchronous Dual-frequency Induction Heating Power Supply Based on Solid State Transformer

同步双频感应加热电源在加热齿轮等复杂工件时具有良好的工艺性。目前提出的同步双频感应电源拓扑都具有整流部分,但电网中存在固态变压器时,可以通过固态变压器实现整流,无需传统拓扑的整流部分。基于固态变压器提出一种新型的同步双频感应加热电源拓扑,当电网中存在固态变压器时可省去传统拓扑中的整流部分,且具有减少谐波对电网污染、电气隔离等优点,给出了各部分控制方式,允许完全控制中频和高频逆变谐振槽路的输出功率和频率,设计了双频谐振网络参数,搭建了实验样机,分别对中频和高频槽路不同输出功率比例进行实验,验证了所提拓扑的可行性。

Synchronous dual-frequency induction heating power supply has good processability when heating complex workpieces such as gears.At present,the synchronous dual-frequency induction power supply topology has a rectification part,but when there is a solid state transformer in the power grid,the rectification can be realized by the solid state transformer,and the rectification part of the conventional topology is not needed.A novel synchronous dual-frequency induction heating power supply topology is proposed based on solid-state transformer.When there is a solidstate transformer in the power grid,the rectification part in the traditional topology can be omitted,and the advantages of reducing harmonics on the power grid pollution and electrical isolation are given.The control methods of each part are allowed to fully control the output power and frequency of each resonant tank of the intermediate frequency and high frequency inverter.The parameters of the dual frequency resonant network are designed,and the experimental prototype is built to control the output power of the intermediate frequency and high frequency tank respectively.Experiments are carried out with different power proportions to verify the feasibility of the proposed topology.