LCC谐振软开关技术在感应加热电源中的应用

Application of LCC Resonant Soft-switching Technology in Induction Heating Source

在传统感应加热串联谐振模式的基础上,提出了一种新型串并联谐振模式,即LCC谐振电路。通过在电路中增加一个并联谐振元件,解决了串联谐振模式输出电压受限于输入电压的问题,避免高频负载匹配变压器的使用,缩小了感应加热电源的体积和重量,对LCC谐振模式的电路结构进行详细分析和参数选择,通过仿真验证了该谐振模式的可行性和参数设计的正确性,并通过设计使开关器件工作于零电压软开关模式,解决了高频化所带来的开关损耗大和开关器件应力大等问题。

The paper proposes a new type of series and parallel resonance mode （LCC resonant circuit ）of induction heating, which based on the traditional series resonant model. By adding a parallel resonant circuit components, it can solve the problem that the output voltage is limited by the input voltage under the condition of series resonance and avoid the use of high-frequency load-matching transformer, reduce the induction heating power supply size and weight, which can agree induction heating supply requirements of high frequency , small size , high-capacity. The paper analyzes the LCC resonance circuit and choose parameter , verify the feasibility of the resonant mode and the correctness of the parameter by simulation. It makes switching devices work at zero vohage soft-switching mode by designing, solves the problems of large switching losses and high switching device stress resulting from high frequency.