一种新型串联功率半导体器件的隔离供电系统

A Novel Electrical Isolated Power Supply System for Series Connected Semiconductor Devices

在此提出了一种用于串联半导体器件的多路输出隔离供电系统。该系统运用了变压器松耦合的原理,同时具有高压隔离、小型化、模块化的优点。模块化设计使得该系统易扩展,进而用于由更多半导体器件串联的更高电压等级的半导体开关供电。该供电系统采用反激式电路原理,运用了有源功率因数调节功能减少高次谐波,随后对其关键参数进行了选值和优化。基于该隔离供电系统设计思路,搭建了由14个IGBT串联,可耐压40 kV的高压开关,并通过实验验证其可靠性。实验结果证明,该系统可为多路IGBT驱动电路提供稳定的18 V供电电压,且IGBT动作正常。

The structure of a novel electrical isolated power supply system for series connected semiconductor devices is illustrated , which involves a novel circuit topology based on transformer loose coupling technology.The power supply system has the advantages of electrical isolation , miniaturization and modularization.It is easy to extend to higher voltage rating, because of its feature of modularization .The topology of the system is flyback circuit.The system has the function of power factor correction to reduce the influence of harmonic.The key parameters are selected and optimized. A high voltage switch rated 40 kV consisting of 14 series connected IGBTs is fabricated and experimental study is made to improve its feasibility.The final results proves that the power supply system can supply power for multiple series connected IGBTs simultaneously and ensure the IGBTs are activated normally.