主动磁悬浮系统中数字功放的研究  

Research of Digital Power Amplifier for Active Magnetic Levitation System

作　　者：张燕红[1] 张建生[1] 王磊 吴政涛 陆超然 赵晨晖 ZHANG Yan-hong;ZHANG Jian-sheng;WANG Lei;WU Zheng-tao;LU Chao-ran;ZHAO Chen-hui(Changzhou Institute of Technology,Changzhou213032,China;China North Communication Technology Co.,Ltd.,Xinxiang453000,China;Changzhou University,Changzhou213164,China)

机构地区：[1]常州工学院,常州213032 [2]中兵通信科技股份有限公司,新乡453000 [3]常州大学,常州213164

出　　处：《微特电机》2018年第12期74-78,共5页Small & Special Electrical Machines

基　　金：国家自然科学基金项目(51175052,51405040);江苏省自然科学基金项目(BK20151182);校级科研项目(YN1622);江苏高校品牌专业建设工程资助项目(PPZY2015B129);2017年度江苏高校文化创意协同创新中心研究项目(XYN1706);江苏省教育厅高等学校然科学研究重大项目(18KJA413001);江苏省产学研合作项目(BY2018134)

摘　　要：在主动磁悬浮系统中,传统的两电平开关功放的功率损耗较大,三电平开关功放需要进行移相电路设计,使得功放电路更加复杂、成本更高。因此,设计了一种基于ARM芯片STM32F103ZET的无需移相的三电平开关功放,通过数字芯片产生占空比不断变化的PWM信号来控制开关管的导通。搭建了主动磁悬浮系统的模拟平台,对线圈电流纹波特性进行仿真分析,并对线圈电流跟踪情况进行了实验测试,实验结果表明该设计的数字功放具有较好的性能。In active magnetic levitation system,the power loss of two level switching power amplifier is very much and the phase shifting circuit should be designed in three level switching power amplifier,which makes the power amplifier circuit more complex and more costly.Therefore,a three level switching power amplifier without phase shift was designed based on STM32F103ZET,PWM signal with variable duty cycle was generated by digital chip to control the turn-on of switch tube.The simulation platform of active magnetic levitation system was built.The current ripple characteristics of the coil was simulated.The coil current tracking situation was tested,which proved that the digital power amplifier can be used in magnetic levitation system well.

关 键 词：主动磁悬浮系统 功率放大器 三电平开关功放 线圈电流 

分 类 号：TM302[电气工程—电机]