机载平台下功率级驱动及PWM死区控制的研究  

Study of Drive Power Stage and PWM Dead Zone Control on Airborne Platform

作　　者：周俊鹏[1] 李焱[1] 

机构地区：[1]长春工业大学,长春130012

出　　处：《微特电机》2014年第10期35-38,共4页Small & Special Electrical Machines

基　　金：国家高技术研究发展计划(863计划)项目(2006aa701410)

摘　　要：依托DSP2812配合CPLD为IPM集成功率模块提供单极性PWM信号,用以驱动机载平台下快速反射镜的音圈电机所需PWM波。比传统的DSP直接用死区寄存器设计的死区时间方便灵活而且准确。传统驱动功率级方法大多利用集成模块本身的死区来控制电机,在DSP死区寄存器中设置死区时间繁琐,不能方便地得到整微秒,而在CPLD中使用D触发器能够准确地得到整微秒死区时间。试验表明,该方法实际得到的功率驱动PWM波死区时间为5.8μs,与理论值6μs仅差0.2μs,完全符合工程需要。稍带尖峰的PWM波提高了带载能力,增加驱动的快速性。该方法已成功应用在某项目中,并在直流调速中对PWM波的获取有很好的通用性和借鉴性。An unipolarity PWM signal was provided for integrated power module（IPM） based on DSP2812 with CPLD to drive voice coil motor of fast reflector of airborne platform.It＇s more convenient and accurate than traditional DSP the dead zone time of which was directly designed with register.Traditional power stage method mostly used dead zone of its own integrated module to control motor,and to set the DSP dead zone time in the register is complicated and difficult to obtain the whole microseconds.To use D flip-flop in CPLD can accurately get the whole microseconds dead zone time.Experiment results show that dead zone time of power drive PWM wave by this method is 5.8 μs with error of 0.2 μs to theoretical value 6 μs,and can fully meet engineering requirements.PWM with slight peak wave can improve the loading ability and increase the rapidity of driving.This method is successfully used in some project,and has good versatility and helps for obtaining PWM wave in DC regulating.

关 键 词：伺服电动机 DSP CPLD PWM波 死区 

分 类 号：TM383.4[电气工程—电机]