Advanced Phase-Shifting Transformer for Industrial Power Conversion

The three phase five limb rectifier transformer is a high-performance power conversion solution designed for industrial applications requiring stable output, low harmonic distortion, and high reliability. With its advanced phase-shifting capability and optimized magnetic structure, this transformer ensures smooth waveform output and improved power quality in demanding electrical systems.

It is widely used as an isolated power supply in high-voltage variable frequency drive systems, enabling multi-pulse rectification technology and effectively suppressing harmonic currents in industrial power networks.

Applicable Standards

This transformer is manufactured in accordance with internationally recognized standards, including the IEC 60076 series for power transformers and IEC 61378 for rectifier transformers used in industrial applications.

It also complies with national and industry standards such as JB/T 8636 for power converter transformers and GB1094 standards covering general requirements, temperature rise, and dry-type transformer performance.

Configuration and Model Definition

The model designation reflects key parameters including transformer type, phase configuration, cooling method, insulation class, rated capacity, and voltage level. The transformer is designed as a three-phase unit with optional natural air cooling or forced air cooling, depending on operational requirements.

The dry-type non-encapsulated structure enhances operational safety, environmental compatibility, and ease of maintenance in industrial environments.

Key Features

The five limb core design improves magnetic flux distribution, resulting in smoother output waveforms and significantly reduced harmonic distortion. This ensures reliable performance for sensitive industrial equipment and power electronics systems.

The transformer offers excellent heat dissipation and strong resistance to thermal shock, allowing stable operation under fluctuating load conditions. Its high overload capacity, low loss, and low noise characteristics make it suitable for continuous industrial operation.

When integrated with high-voltage frequency conversion systems, the transformer supports multi-pulse rectification, improving power quality and reducing harmonic pollution in the grid.

Applications

The three phase five limb rectifier transformer is widely used in industries such as electrical engineering, petroleum, chemical processing, metallurgy, cement production, mining, and steel rolling mills. It is also suitable for municipal infrastructure including water supply systems and wastewater treatment facilities.

Additional applications include textile manufacturing, paper production, pharmaceutical processing, and other industries that require stable and efficient power conversion systems.

Structural Design

The transformer core is constructed from high-quality cold-rolled silicon steel sheets, precisely laminated at a 45-degree angle to minimize losses and enhance magnetic efficiency.

The insulation system utilizes H-class materials with a design life of up to 20 years, ensuring long-term reliability under high thermal stress. The non-encapsulated winding structure provides excellent flame-retardant performance and improved heat dissipation.

All conductors are insulated with high-grade materials and treated with protective coatings, including high-temperature curing and three-proofing varnish, which enhance resistance to moisture, dust, and corrosion while improving short-circuit strength.

The transformer enclosure is made of high-strength steel, providing durability and mechanical protection. Cable entry and exit are typically arranged at the bottom, with dedicated fixing devices to ensure safe and convenient installation.

Custom Design and Technical Support

We provide customized three phase rectifier transformer solutions based on project requirements, including capacity, voltage level, cooling method, and harmonic suppression configuration. Our engineering team ensures optimized performance for various industrial applications.

Contact us today for technical consultation and a tailored quotation for your rectifier transformer project.