三相交错并联磁集成Boost变换器的内部本质安全特性

Analysis of Inner-Intrinsic Safety for Three-Phase Interleaving Magnetic Integrated Boost Converter

为了解决传统矿用本质安全开关变换器存在电气性能指标(如大功率,低输出电压纹波,高效率)要求大电感、大电容与本质安全(本安)特性要求小电感、小电容的矛盾,本文将交错并联磁集成理论应用到传统单通道Boost变换器中,提出等效电气电感和等效本安电感的概念,通过增大等效电气电感和减小等效本安电感使变换器能同时满足电气性能和本安性能的要求,并在此基础上分析了三相交错并联磁集成Boost变换器的内部本安特性,得出该变换器的内部本安判据。与传统单通道Boost变换器以及三相交错并联Boost变换器相比,三相交错并联磁集成Boost变换器在电气性能和本安性能上均有显著的提高,通过实验表明了理论分析的正确性。

There is a contradiction of traditional mining intrinsic safety switching converter between large inductance, capacitance which is required by the electrical characteristics(such as big output power, low output voltage ripple, high efficiency) and small inductance, capacitance which is required by the intrinsic safety characteristics. So, this paper introduces magnetic integration theory to the intrinsic safety switching converter to solve the problem and proposes the concept of equivalent electrical inductance and equivalent intrinsic safety inductance. The switching converter can satisfy both the electrical characteristics and the intrinsic safety characteristics by increasing the equivalent electrical inductance and reducing the equivalent intrinsic safety inductance. Take the three-phase interleaving magnetic integrated Boost converter as an example, by analysis of the inner-intrinsic safety characteristics of the converter, the inner-intrinsic safety criterion of the converter is obtained. Comparing with the conventional single-channel Boost converter and the three-phase interleaved Boost converter, it concludes that the three-phase interleaving magnetic integrated Boost converter improve the electrical characteristics and the intrinsic safety characteristics effectively. Finally, the theory is verified with experimental results.