Name: China Secondary Rectification Transformer Manufacturers, Suppliers and Factory - Good Price - Haifei
Brand: Haifei
SKU: 297663719

The Secondary Rectification Transformer is the critical component in resistance welding power supplies that performs AC to DC rectification directly on the secondary side. By converting high-voltage, low-current AC into stable low-voltage, high-current DC, it ensures superior heat control and welding consistency.

HAIFEI Secondary Rectification Transformer

Certifications

40+ Patents and 2 National Software Copyrights, 10,000㎡ Factory with 100+ skilled employees.

Our Partners

We have served over 5,000+ customers worldwide, and our long-term partners include Tesla, BYD, and Siemens.Over 50+ Fortune 500 companies.

HAIFEI Customer site

HAIFEI Aluminum Welder Impresses International Visitors

HAIFEI Seam Welding Machine Gains High Recognition From European Client, On-Site Technical Cooperation Intention Reached

Tunisian Client Successfully Accepts HAIFEI's Automated Car Lift Welding Workstation

HAIFEI Successfully Ships 16 High-Performance Diffusion Welding Machines To India

European Partner Implements Haifei's Fully Automated Welding Cell For Automotive Lift Components

Finnish Technical Delegation Visits Haifei For Copper Braid Diffusion Welding Solutions

Indian Clients Visit HAIFEI To Explore High-Performance Diffusion Bonding Solutions

Tata Group Successfully Completes Final Acceptance Of Haifei's Fully Automatic Silver Contact Welding Machine

HAIFEI Showcases Innovative Welding Solutions At Shanghai International Automotive Manufacturing Technology Exhibition

HAIFEI Welding Equipment Successfully Packed And Shipped To Tunisia

Working principle of secondary rectifier transformer

Input Stage

Standard AC input (Single-phase or Three-phase).

Transformation

Voltage reduction via the main transformer core.

Rectification

AC to DC conversion via Diode Bridge / Modules.

Output

High-stability DC for precision welding.

What are the core technological advantages of secondary rectifier transformers?

Reduced Heat Affected Zone

Stable DC output provides more concentrated heat, significantly reducing material discoloration and deformation.

Superior Consistency

Eliminates the current fluctuations common in traditional AC welding, ensuring every weld nugget is uniform.

Optimized for High-Conductivity Materials

The smooth DC waveform is essential for challenging materials like Copper (Cu) and Aluminum (Al).

Series Comparison: Single-Phase DC vs. Three-Phase BTDC

Feature	Single-Phase DC	Three-Phase BTDC
Input Power	Single-Phase AC	Three-Phase AC
Current Stability	Medium	High
Ripple Factor	Higher Ripple	Low Ripple / Continuous
Ideal Materials	Carbon Steel / Hardware	Copper / Aluminum / Coated Steel
Typical Use	Manual / Semi-Auto	High-End Auto / Robotics

Single-phase Secondary Rectification Transformer (DC)
MODEL	Rate Power	Primary Power	Duty Cycle	Rated Input Current	Secondary No-load Voltage	Short Circuit Current
DC-25	25 KVA	380 KVA 50HZ	50%	66A	4V	20KA
DC-63	63 KVA	380 KVA 50HZ	50%	131 A	6.8 V	30 KA
DC-100	100 KVA	380 KVA 50HZ	50%	197 A	7.3V-9.5 V	38 KA
DC-160	160 KVA	380 KVA 50HZ	50%	263 A	9.5-11.8 V	46 KA
DC-200	200 KVA	380 KVA 50HZ	50%	328 A	10.5-12.6 V	53 KA
DC-250	250 KVA	380 KVA 50HZ	50%	421 A	10.8-13.6 V	58 KA

Three-phase Secondary Rectification Transformer (BTDC)
MODEL	Primary Power	Duty Cycle	Secondary No-load Voltage	Short Circuit Current
BTDC-3*100	380 KVA 50HZ	50%	7.3V-9.5V	66 KA
BTDC-3*160	380 KVA 50HZ	50%	9.5V-11.8V	90 KA
BTDC-3*200	380 KVA 50HZ	50%	10.5V-12.6V	110 KA
BTDC-3*250	380 KVA 50HZ	50%	10.8V-13.6V	125 KA

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New Energy & Battery

Precision welding for battery tabs and copper busbars.

Automotive Manufacturing

High-strength steel body components and accessories.

Power Electricals

Switchgear connections and high-voltage components.

FAQ

Secondary Rectification Transformer

01.Why is DC output superior to AC for welding copper and aluminum?

DC output provides concentrated heat and a smooth waveform without the "zero-crossing" interruptions found in AC. This is critical for high-conductivity materials. By using a Three-phase BTDC Transformer for copper welding, you can reduce spatter by over 30%, minimize the Heat Affected Zone (HAZ), and ensure superior weld nugget consistency for demanding industrial applications.

02.How do I choose between Single-phase DC and Three-phase BTDC transformers?

It depends on your precision requirements. Single-phase DC is a cost-effective solution for standard steel or hardware. However, for industries like EV batteries or precision electronics involving copper and aluminum, the Three-phase BTDC series is essential. It offers a balanced grid load and ultra-low ripple, making it the standard for high-end automated production lines.

03.How can I improve welding reliability for power battery assemblies?

Battery tabs are extremely thin and dissipate heat rapidly. We recommend a Secondary rectifier transformer for battery tab welding. This series optimizes current rise time to prevent burn-through while providing stable DC control. It ensures every joint meets strict pull-test standards, making it the preferred power source for new energy manufacturing.

04.How does a secondary rectifier transformer impact factory grid management?

Unlike traditional single-phase AC units, our Three-phase BTDC transformers distribute the welding load evenly across all three phases. This prevents voltage imbalances and minimizes the risk of breaker trips. Additionally, it improves the power factor, leading to significant long-term savings in power maintenance and energy costs.

05.What is the durability of these transformers under 24/7 heavy-duty cycles?

Our transformers feature high-performance diode modules paired with precision-engineered forced water cooling. This design allows for a 100% duty cycle without overheating or diode breakdown. In robotic welding cells, our products maintain a high MTBF (Mean Time Between Failures), ensuring your production line stays operational around the clock.

06.Can I retrofit my existing AC welding machine with a Secondary Rectification Transformer?

Yes. We offer customized retrofit kits that allow you to upgrade to DC performance without replacing the entire machine. We provide the rectifier bridge, busbar system, and technical guidance to ensure compatibility with your current controller, helping you achieve high-precision results at a fraction of the cost of a new machine.

Get a Customized Selection Guide

Wuxi Haifei Intelligent Equipment Co., Limited is one of the leading manufacturers and suppliers of secondary rectification transformer in China. With abundant experience, we warmly welcome you to buy advanced secondary rectification transformer for sale here from our factory. Quality products and reasonable price are available.

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