Power(kVA):
75/100/130/140/160/170/220/225/250
Input Power:
1000Hz / 1800Hz / 6000HZ PWM 500V
Duty Cycle:
20%/50%
Short Circuit Current（KA）:
12 / 25.9 / 31 / 31.5 / 38 / 39 / 40 / 45.5
Power(kVA):
54/61/76
Input Power:
15~400Hz PWM 500V
Duty Cycle:
50%
Short Circuit Current（KA）:
20.4
Resistance Welding Transformers
Sunke provides reliable resistance welding transformers and power supplies for automotive and industrial applications. Designed for seamless integration with welding controllers, welding guns, and robotic systems, our solutions support a wide range of welding applications, from precision spot welding to heavy-duty projection welding.
Our water-cooled transformer portfolio includes MFDC and MFAC models, available in various specifications to meet different welding power and application requirements.
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Types of Resistance Welding Transformers
Sunke provides MFDC and MFAC welding transformers for different resistance welding systems. The two types differ mainly in output form, structure, and suitable welding applications.
| Transformer Type | Key Features | Typical Applications |
|---|---|---|
| MFDC Welding Transformer | Rectified DC output with a compact structure for stable resistance welding performance. | Manual welding guns, robotic welding guns, spot welding machines, and automated production lines. |
| MFAC Welding Transformer | Alternating-polarity output without secondary rectifier diodes, supporting balanced heating and reduced one-sided electrode wear. | Manual and robotic welding systems requiring medium-frequency AC output. |
Key Features of Sunke Welding Transformers
Sunke welding transformers are designed for reliable power conversion, compact integration, and stable operation in industrial resistance welding systems.
Compact Design
Optimized transformer structures help reduce size and weight for integration with manual welding guns, robotic guns, and automated equipment.
Stable Power Output
Designed to deliver the low-voltage, high-current output required for consistent resistance welding performance.
Efficient Cooling
Water-cooled configurations support heat dissipation during repetitive welding cycles and continuous industrial operation.
Thermal Protection
Built-in over-temperature protection helps reduce the risk of overheating during demanding welding applications.
System Compatibility
Available configurations support integration with MFDC and MFAC welding controllers, welding guns, machines, and automated systems.
Custom Configurations
Power rating, dimensions, output characteristics, structure, and cooling arrangements can be adapted to different equipment and project requirements.
Resistance Welding Transformer Applications
Sunke welding transformers can be configured for different welding equipment, production layouts, and resistance welding processes.
| Application | Typical Uses |
|---|---|
| Manual Spot Welding Guns | Compact transformer integration for suspended and handheld welding equipment. |
| Robotic Spot Welding | Welding transformers for robotic guns used in automotive and automated production lines. |
| Projection Welding | High-current welding for nuts, bolts, terminals, and formed projections. |
| Fixed Welding Machines | Integration with stationary spot and projection welding equipment. |
| Automated Resistance Welding | Use with welding controllers, PLCs, robots, and automated welding systems. |
Explore more resistance welding applications for automotive, industrial, and automated production.
Resistance Welding Transformer FAQs
What does a resistance welding transformer do?
A resistance welding transformer converts electrical input from the welding power supply into the low-voltage, high-current output required for resistance welding.
What is an MFDC welding transformer?
An MFDC welding transformer works with a medium-frequency DC welding controller and provides the high welding current required for DC resistance welding after secondary rectification.
What is the difference between MFDC and MFAC welding transformers?
MFDC welding transformers are used in direct-current welding systems and typically include secondary rectification. MFAC welding transformers work with alternating-polarity medium-frequency output and do not require secondary rectifier diodes.
What are spot welding transformers used for?
Spot welding transformers are commonly used in manual welding guns, robotic welding guns, stationary welding machines, automotive production lines, and other automated resistance welding systems.
How do I choose the right welding transformer?
Selection depends on the welding controller type, required power and current, duty cycle, output voltage, welding gun structure, cooling conditions, installation space, and production requirements.
Can Sunke customize welding transformers for different equipment?
Yes. Sunke supports customized power ratings, output characteristics, dimensions, structures, and cooling configurations to match different welding guns, machines, robotic systems, and production requirements.
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