PDF《M O SFET 高频感应加热电源的研究》

第二,M O SFET 漏2 源并联补偿电容;

第三, 高频主线穿过阻尼磁环. 多种措施使高频寄生振荡基本得以抑制.

3 实验结果及结论 图7样机输出波形 本文研制的样机是在大量试验的基础上完成的, 该样机能适 应高频感应加热的工作要求. 图7示出样机在某负载条件下, 逆 变器工作在直流 280V , 直流电流 35A 时的输出电压电流波形. 此 时功率超过 10kW , 工作频率为 70kH z . 实验结果表明, 串联逆变器较适合高频工作, 但在高频工况 下, 应特别注意寄生参数在线路中的影响. 随着廉价、 大容量功率 M O SFET 的推出, 半导体高频感应加热电源将很快替代电子管 高频电源. 参考文献: [1 ] 郑春龙. 功率场效应晶体管及其在高频加热电源中的应用. 浙江大学学报(自然科学版) , 1998, (3):

21 ~ 25. [2 ] 吴兆麟. 串联逆变式高频感应加热电源. 电力电子技术, 1994, 28:

18 ~ 22. MOSFET H igh Frequency Induction Heating Supply W ang Shengde

1 , Zhai Yu

2 (1. D ep artm ent of E letronic E ng ineering , Z hengz hou U niversity;

2. T he T raf f ic S chool of H enan P rov ince, Z hengz hou) Abstract: W ith m ultidevices parallel connected and pow er M O SFET s as pow er sw itch, a

10 kW H F induction heating pow er supp ly is comp leted. The research and experi m ent are i mp lem ented fo r the inverters circuit, contro l circuit and m ultidevices parallel drive. The experi m ent results verify that M O SFET m ultidevices parallel can autom aticticies balance current as po sitive temperature characteristics . The series resonance circuit is si mp le, its start easy and resonance2frequency high. It is suitable in sm all pow er induction heating supp ly. Key words: induction heating;

pow er M O SFET s;

high2frequency pow er supp lies;

resonance

7 5 第3期王生德等:M O SFET 高频感应加热电源的研究 ........