We have been manufacturing rectifier transformers since 1986. Valuable experience and high current processing guarantee the excellent quality. We strictly use superior materials and advanced design to ensure large overload capacity of the rectiformer. To keep low loss for rectifier transformer, the width of the cross section of windings gets increased. We fully consider the dynamic thermal stability to have strong short circuit resistance. In the meantime, rectifier transformer also features low temperature rise, no leakage, low noise, and low partial discharge.
The working principle of a rectifier transformer involves the conversion of alternating current (AC) to direct current (DC) by utilizing a combination of a transformer and a rectifier circuit. The process can be summarized in the following steps:
Step-Down Transformer: The rectifier transformer typically begins with a step-down transformer. This transforme is responsible for reducing the high voltage AC from the power supply to a lower voltage level suitable for the rectifier circuit. A rectifier circuit may use a normal step-down transformer or a center-tapped transformer. The normal step-down transformer is used when it is a half-wave rectifier or a bridge rectifier circuit.
Rectifier Circuit: The output of the step-down transformer is then connected to the rectifier circuit. The rectifier circuit consists of diodes that allow the current to flow in only one direction. Diodes are nonlinear electrical devices that have the property of rectifying alternating current into pulsating direct current.
Half-Wave or Full-Wave Rectification: The half-wave rectifier is built with a single PN junction diode that converts one-half cycle only. The full-wave rectifier circuit with a center-tapped transformer requires two PN junction diodes. The full-wave bridge rectifier circuit is built with four PN junction diodes. The bridge transformer rectifier is the most efficient among all and is nowadays mostly used.
Filtering: To obtain a smoother DC output, a filtering circuit is used. It typically consists of capacitors that store and discharge electrical energy, reducing the AC component of the output and producing a more stable DC voltage.
Rectifier transformer manufacturers typically incorporate a step-down transformer at the beginning of the rectifier transformer to ensure a proper voltage level for the rectification process.
Voltage Adjustment: A step-down transformer helps adjust the voltage to a suitable level for the rectifier circuit's operation. This voltage adjustment ensures that the rectifier circuit and the load connected to it receive the appropriate voltage required for their proper functioning.
Reliability: Power grids usually transmit electricity at high voltages to minimize losses over long distances. However, most associated electrical equipment offered by rectifier transformer suppliers is designed to operate at lower voltages for safety reasons. By using a step-down transformer, the high voltage from the power supply can be safely reduced to a safer and more manageable level for the rectifier circuit and the connected load.
Isolation: Transformers offer electrical isolation between the input and output sides. This isolation serves to protect the rectifier circuit from any potential electrical faults or disturbances on the power grid side, such as surges or voltage transients. The step-down transformer acts as a barrier, preventing any irregularities from affecting the rectifier circuit and load, and enhancing the overall safety and reliability of the system.
High efficiency: Step-down transformers can improve the efficiency of rectifier circuits by reducing power losses. By decreasing the voltage at the input of the rectifier circuit, power losses associated with higher voltages are minimized, leading to improved overall efficiency.
As one of the leading transformer suppliers in China, we have been manufacturing rectifier transformers since 1986. Valuable experience and high current processing guarantee excellent quality. We strictly use superior materials and advanced design to ensure its large overload capacity. To keep low loss for rectifier transformer, the width of the cross section of windings gets increased. We fully consider the dynamic thermal stability to have strong short circuit resistance. In the meantime, it also features low temperature rise, no leakage, low noise, and low partial discharge.
Rectifier transformers produced by professional rectifier transformer manufacturers find wide-ranging applications in numerous industrial processes that necessitate a substantial supply of direct current (DC).
Aluminum Smelting: Rectifier transformers are indispensable in the aluminum smelting industry. They are employed to step down the high voltage AC supply and provide the necessary low voltage DC power to the aluminum reduction cells. The DC power is used to drive the electrolysis process that transforms alumina into molten aluminum.
Cathodic Protection: Rectifier transformers used in cathodic protection systems can prevent corrosion of buried or immersed metallic structures, such as pipelines, tanks, and offshore structures. The rectifier transformer supplies a controlled DC voltage to the structure, creating a protective electrochemical reaction that slows down or prevents the corrosion process.
Electrochemical Processes: Rectifier transformers are employed in various electrochemical processes that involve the generation or control of DC voltage. These processes include electroplating, electrowinning, water electrolysis, and other electrochemical manufacturing processes. The rectifier transformer provides the required DC voltage and current for these applications.
High Voltage Direct Current (HVDC) Systems: Rectifier transformers play a crucial role in HVDC systems, which are used to transmit large amounts of electricity over long distances. The rectifier transformer converts AC voltage from the grid to high voltage DC, which is then transmitted through HVDC transmission lines. This enables efficient long-distance transmission of electricity, often between different power grids or for offshore wind farms.