Development of Intelligent Frequency Converter Based on CAN Bus

摘要

A frequency converter with CAN bus interface is designed. The control structure composed by double single chip microcomputer is adopted. The parallel communication can be fulfilled with the dual-port-RAM. The novel communication interface chip SJA1000 and AT89C51 single chip microcomputer are applied to construct CAN bus interface, so the device can easily join in the monitoring network of CAN field bus with necessary interfaces. The control core of frequency converter composed of the single chip microcomputer AT89C51 and sine PWM chip HEF4752, the main circuits and flow charts are also given.