嵌入式预充电电源控制系统的设计与实现

研制了基于PC/104总线为核心的嵌入式预充电电源控制系统,重点阐述了该控制系统的硬件结构与软件设计;该控制系统以SBC-4680为控制系统主板,通过PC/104总线控制PCM-5120模拟量输入输出卡,控制PCM-5134的IO和定时计数卡,同时制作相应的接口电路及看门狗电路,在DOS操作系统中,利用C++编写底层软件,控制中采用PID算法及特殊数据处理方法,利用VB编写上位机操作界面与图形显示软件,实现与底层软件的以太网通信、信号的实时传输、显示与处理;实验证明,采用此预充电控制系统以后,使高压电源的波头质量得到极大提高,既消除了震荡,又避免了电压跌落等情况的出现,同时该电源的控制精度达到1%,因此,该控制系统完全满足电源控制及保护需要。

Design and Realization of an Embedded Pre-charged Power Supply Control System

The Embedded Pre-charged Power Supply Control System based on PC/104 is designed to satisfy the requirement of the high voltage power supply.Meanwhile,the system hardware and software are presented.The motherboard of the control system is SBC-4680,and the PCM-5120(AD/DA) card and the PCM-5134(IO/timer counter) card are used in the system,an interface circuit and a watchdog circuit are designed to support the control system.C++ is chosen as program language under MICRO SOFT DOS operation system,the PID and some data processing methods are used in the software.VB is chosen as program language in the monitor computer,which exhibit the function such as Ethernet communications,real-time data transmit,signal display,etc.After the control system is used,the output voltage of the high-voltage power supply is better than before,the vibration and falling of output voltage are avoided and the control precision is about 1%.Good controlling properties and reliable protective properties of the control system are proven.