Research on inverter based on Nios II and system design

Variable frequency adjust the speed of the implements by changing the stator´s voltage and frequency. The characteristics such as energy saving, high efficiency, wide adjusting range, excellent static and dynamic performance make it a high-performance AC speed-adjusting method. In this paper, we have researched the SOPC-based variable frequency speed-adjusting system, including its design principle and application. This paper also has customized an embedded IP core and has replanted the Nios II soft core to a FPGA successfully. Besides, the FPGA-based control circuits and IPM drive circuits, the design of which are proved reliable and correct, are implemented in this paper. Finally, this system has been tested on the experiment platform designed by ourselves. It works stably in the on-load and off-load experiments, which indicates that the original design purpose is achieved.