Implementation of FPGA Based Closed Loop V/f Speed Control of Induction Motor Employed for Industrial Applications

In recent days, Field Programmable Gate Array (FPGA), provides the ability to integrate multiple tasks through the parallel operations. This processor is preferred over DSP for the implementation of controller to control speed of induction motor through power converter employed in industrial applications. This paper presents the implementation of FPGA based closed loop V/F speed control of induction motor. The existing approaches having the limitations of regulating slip and conversion of frequency in proportion to the slip. This issue can be addressed by summing the slip with actual speed during conversion of speed into frequency. Further, this paper focuses on the development of the PI controller using Xilinx block sets to improve the tracking ability of the controller. The developed controller is validated on hardware test bench consisting of FPGA based controller connected to Induction motor drive. Finally, it can be concluded that FPGA processor provides a real deterministic behavior of induction motor employed in industrial applications.