磁轴承三态开关功率放大器的电流模式控制  

Current Mode Switching for Tri-state Amplifiers in Magnetic Bearing Control System Supporting High Speed Motors

作　　者：李冰[1] 邓智泉[1] 严仰光[1] 

机构地区：[1]南京航空航天大学,江苏南京210016

出　　处：《电力电子技术》2003年第4期52-55,共4页Power Electronics

基　　金：国家自然科学基金资助 (599770 0 9);航空科学基金资助(99F52 0 0 4 )

摘　　要：针对传统磁轴承二态开关功放电流纹波大和损耗大、可靠性差的缺点 ,提出了一种电流模式控制的三态开关功放 ,介绍了其工作原理和电路的实现。研制了一套容量为 0 .7kVA的磁轴承开关功放。实验结果表明 ,该功放电流纹波小、效率高、带宽大。The standard bi state magnet bearing amplifier has some disadvantages such as high current harmonics and Losses,low reliability,and the current mode switching for tri state amplifier is expounded.The basic principle and circuit of this kind of amplifier are introduced.A 0.7 kVA tri state switching power amplifier using current mode switching is developed for magnetic bearings.Experimental results show that the new designed amplifier has many features,such as low current distortion,high power,efficiency,reliability and wide bandwidth and so on.

关 键 词：功率放大器 电流模式 三态开关功率放大器 磁轴承 电流纹波 损耗 

分 类 号：TN772.75[电子电信—电路与系统]