Real time models for FPGA based control of power electronic converters: A graphical programming approach

摘要

Power Electronic converters and systems require precise timing control. Field Programmable Gate Array (FPGA) has the advantages of reconfigurability, determinism and precise timing control over other digital controllers. Models for real-time switching pulse generation for power electronic converters namely AC to DC, DC to AC, AC to AC, DC to DC converters are built using a real time environment-NI's CompactRIO - a hardware module which combines an FPGA and various I/O modules. The FPGA has been programmed graphically using the software module Labview-FPGA (2014 version). Control signals have been validated with AC to DC converters with R, RL, RLE loads and real time control of these converters has been achieved. Open loop speed control of Converter-fed DC motor has been achieved, with the controller in the system being FPGA of CompactRIO. Speed control with closed loop current control has also been tested with the same real time environment.