Three-Phase Full-Bridge Fully-Controlled Rectifier Circuit

The three-phase full-bridge fully-controlled rectifier circuit is designed to convert three-phase alternating current (AC) into direct current (DC). This circuit employs a three-phase bridge rectifier to achieve the conversion and utilizes thyristors within the control circuitry to regulate voltage and current. In practical implementations, control algorithms often involve phase-angle firing control using pulse-width modulation (PWM) techniques to manage the conduction angles of the thyristors. Capacitors are integrated into the circuit to smooth the output current, while filter circuits are applied to minimize noise and ripple. For stability and safety, protection circuits and temperature sensors are essential components. These can be programmed using microcontrollers or DSPs to monitor parameters like overcurrent, overvoltage, and thermal conditions, triggering shutdowns or alerts when thresholds are exceeded. Overall, the three-phase full-bridge fully-controlled rectifier circuit finds extensive applications in industrial and daily life scenarios, such as electroplating, electrolysis, and electric welding, where precise DC power control is critical.