Design and Implementation of Single-Phase Inverter Based on Lightweight TCP/IP Protocol

摘要

As for resource-limited embedded devices, lightweight TCP/IP protocol (LwIP) is used for communication in order to meet real-time requirements of embedded devices. This paper offered and implemented a single-phase inverter solution based on lightweight TCP/IP protocol. The designed hardware circuit of the master control board is equipped with the AM3352 as its core while the hardware circuit of slave control board uses TMS320F28335 as its core. The master and slave control boards are equipped with CAN communication module, digital and analog gathering module, extended Ethernet, PWM module, RS232/485 and other peripheral interfaces. The master control software completes tasks in the embedded Linux OS including setting the various system parameters and processing and converting data. The slave control software receives data from master control software, controls the single-phase inverter by using the PWM module, gathers the voltage and current changes in the inverter. Finally, the gathered data are fed back to the master control software. Test results show that the system enjoys the advantages of easy manipulation, outstanding real-time performance and stable operation, which can satisfy practical application.