单桥“寄生中频”双频感应加热电源的研究

Research on Parasitic Intermediate Frequency Dual Frequency Induction Heating Power Supply for Single Inverter Bridge

感应加热技术如今已经广泛应用在工业领域中,对于齿轮这种复杂的工件,采用双频感应加热技术可以使得齿轮表面加热均匀,硬度高。研究了一种新型的同步双频感应加热技术,采用高频电源"中频寄生"的方式产生双频,从而实现对齿轮的加热。主要分析了单逆变桥的复合谐振网络以及"寄生中频"产生的原理,利用Saber仿真软件进行电路的搭建与仿真。最后搭建实际电路进行验证,通过示波器测得稳定的双频电流波形,从而验证了单逆变桥"寄生中频"双频感应加热技术的可行性。

Induction heating technology has been widely used in industrial fields.For complex workpieces such as gears,can be heated uniformly and with high hardness by using dual-frequency induction heating technology.A new synchronous dual-frequency induction heating technology was studied,which used a highfrequency power supply parasitic intermediate frequency to generate dual-frequency to achieve heating of the gear.The composite resonant network of single inverter bridge and the principle of parasitic intermediate frequency generation were analyzed.The Saber simulation software was used to build and simulate the circuit.Finally,a practical circuit was built to verify the feasibility of the double-frequency induction heating technology by measuring the stable double-frequency current waveform.