What is special about Rectifier Transformer?

Rectifier Transformer is a type of transformer that is specially designed for rectification systems, which are used to convert alternating current (AC) to direct current (DC). Rectifier Transformers are widely used in various industrial applications, such as aluminum electrolysis, electric arc furnaces, traction substations, DC transmission systems, etc. Rectifier Transformers have some special features, characteristics and working principles that make them different from ordinary transformers. This article will introduce these aspects of Rectifier Transformers and explain why they are special.

• What are the features of Rectifier Transformer?

• What are the characteristics of Rectifier Transformer?

• How does Rectifier Transformer work?

What are the features of Rectifier Transformer?

1. rectiformer has multiple secondary windings that are connected to different rectifier units, such as diodes or thyristors. The number of secondary windings depends on the number of pulses required for the rectification system, which can be 6, 12, 24, 48 or 60 pulses. The higher the number of pulses, the lower the harmonic distortion and the higher the power quality.

2. rectiformer has a large regulating voltage range that can vary from 0 volts to several thousand volts (DC), depending on the number of loads connected in series. The regulating voltage can be achieved by using a built-in or separate voltage regulation unit, such as an on-load tap changer (OLTC) or a thyristor-controlled reactor (TCR).

3. Rectifier Transformer has a high short-circuit impedance that can withstand high fault currents and transients. The short-circuit impedance also affects the voltage regulation and the power factor of the rectification system.

What are the characteristics of Rectifier Transformer?

1. Rectifier Transformer is applied to various industrial processes that require high power and high quality DC supply. For example, aluminum electrolysis requires a stable and precise DC current to produce aluminum metal from alumina ore. Electric arc furnaces require a high power and variable DC voltage to melt scrap metal and produce steel. Traction substations require a smooth and regulated DC voltage to power electric trains and locomotives.

2. Rectifier Transformer requires regular and periodic maintenance to ensure its performance and longevity. The maintenance activities include inspections, tests, cleaning, lubrication, oil replacement, etc., according to the manufacturer's instructions and standards.

How does Rectifier Transformer work?

1. The primary winding of the Rectifier Transformer is connected to an AC supply source that provides a sinusoidal voltage with a certain frequency (usually 50 or 60 Hz).

2. The secondary windings of the Rectifier Transformer are connected to different rectifier units that convert the AC voltage into DC voltage by using diodes or thyristors. The rectifier units can be arranged in different configurations, such as double star (DSS) or double bridge (DB), depending on the number of pulses required for the rectification system.

3. The phase-shifting windings of the Rectifier Transformer create different phase angles between the secondary windings that help to reduce the ripple and harmonics in the DC output. The phase-shifting windings can be either delta-connected or zigzag-connected.

Rectifier Transformer is a special type of transformer that is designed for rectification systems that convert AC to DC. Rectifier Transformers have some distinctive features, characteristics and working principles that make them different from ordinary transformers. They enable various industrial applications that require high power and high quality DC supply.