Basic Principle: AC input voltage is transformed by a transformer to produce low-voltage AC power, which is then regulated by silicon-controlled thyristors (SCRs) to DC power, resulting in the required output voltage and current. A control circuit samples the output voltage and current, and after closed-loop feedback, uses phase control to control the phase angle at the moment the SCR is triggered to conduct, maintaining a stable output voltage or current.
System Architecture: Input Side: Three-phase AC power passes through a transformer and enters the rectifier circuit. Rectification and Voltage Regulation: The SCR rectifier circuit converts the AC power into adjustable DC power. Output Side: After filtering and voltage regulation, a stable DC current is output. The Control Unit: This includes the trigger circuit, feedback control circuit, and protection circuitry, precisely regulating the output voltage and current.
Key Parameters: The input voltage is typically three-phase AC, the output voltage ranges from tens to hundreds of volts, and the output current ranges from hundreds to tens of kiloamperes. Rectification methods include three-phase bridge and double reverse star. The pulse count is 12 or 24 pulses. The circuit features an on-load tap changer and balancing reactor, as well as input and output wiring and control methods. The presence of a DC disconnector and cooler is also covered.
Three-phase Bridge Rectification: Three-phase bridge rectification typically uses a standard three-phase transformer, with the secondary windings connected in a three-phase star or delta configuration. Rectification Elements: Six thyristors (SCRs) or diodes are used to form a three-phase full-wave rectifier bridge.
Double reverse star rectification: Double reverse star rectification is available with or without balancing reactors, also known as the three-phase five-leg design. This requires a specially designed transformer with two secondary windings, each connected in a three-phase star configuration with a 180-degree phase shift. Rectification Elements: Each star-connected three-phase winding undergoes half-wave rectification using thyristors (SCRs) or diodes. To balance the current between the two rectifier circuits, a balancing reactor is usually added on the DC side.
24-pulse double-reverse star-type thyristor rectifier outline diagram
Basic Principle: AC input voltage is transformed by a transformer…
SST power supply kit electrolytic hydrogen production 1.SST solid-state transformer…
Liyuan Haina Rectifier, the professional manufacturer in IGBT and SCR rectifier, committed to providing you with quality solutions and products.
Get more details? We’ll response as soon as possible (within 12 hours).
Liyuan Haina Rectifier, the professional manufacturer in IGBT and SCR rectifier, committed to providing you with quality solutions and products.
Get more details? We’ll response as soon as possible (within 12 hours).
