基于SPI总线的三相电能表的设计

The Design of Three-phase Energy Meter Based on SPI Bus

本文提出了一种采用专用电能计量芯片CS5460A的三相电表系统,利用CS5460A进行电量采集,P89LPC932做数据处理,通过Serial Peripheral Interface(SPI)端口传送电流、电压、有功、无功等实时测量值,并用以太网控制器ENC28J60实现以太网通信,还能配合上位机显示,对电能进行集中管理。由于采用SPI总线通信,只须四条线,不仅节省了I/O口线,而且大大简化了电路设计。

A three-phase energy meter system which is imposed kWh_chip CS5460A is presented. By using a CS5460A to electric gathering and adopting an P89LPC932 to data processing.It can transmit real-time measured values of various electric quantities from Serial Peripheral Interface （SPI）. By using Ethernet controller ENC28J60, it can realize ethernet communication and power centralized management on upper computer. Because of the SPI Bus which used only four lines,it not holy saves the I/O ports,but also makes the circuit more simple.