基于CPLD的功率输出自测试及保护技术研究

摘要

机载供电系统中存在大量的功率接触器和继电器,在驱动这些装置时,如果电路中的瞬态电流过大,将损坏机载计算机本身及后级控制电路.本文设计并实现了一种基于CPLD的功率输出自测试及短路保护技术,由硬件分立元器件和可编程逻辑器件代替DSP处理器,无需软件参与,完全由硬件实现功率驱动和过流保护,使其具有非常高的可靠性和安全性,性能大大优于传统控制开关.%There are a large number of power contactors and relays in the airborne power supply system., The airborne computer control circuit will be damaged if the transient current of the circuit is too large when the devices are driven. In this paper, a CPLD-based power output self-test and shot-circuit protection technology is designed and implemented. Using the hardware discrete components and programmable logic devices instead of DSP processors, it has very high reliability and safety without software participation, and the performance is much better than the traditional control switch.