Research on the fully-controlled rectification control system based on FPGA

It is presented in this paper the design of a three-phase fully-controlled bridge rectifier circuit based on FPGA, aiming to achieve digital and adaptive control of the rectified output. The system detects the natural commutation points of the three-phase power supply and utilizes dual-narrow pulses generated by the FPGA to precisely control the conduction timing of the six thyristors, thereby enabling stable regulation of the output voltage and power. The research involved designing phase sequence and phase-loss detection circuits, synchronous signal processing circuits, and a dual-narrow pulse generation algorithm. Simulation of the circuit and algorithm were conducted using tools such as Multisim and Simulink. Experimental results demonstrate that the system can achieve shifting of the dual-narrow pulses, thus realizing functions such as power regulation and pull-inversion. Additionally, the rectification system effectively enhances the control accuracy and response speed of the rectifier circuit, showing promising prospects for engineering applications.