Medium Frequency DC Welding Transformer
The IDT Series Medium Frequency Welding Transformers are engineered for high-performance resistance welding applications, delivering exceptional efficiency, precision, and stability in modern industrial production environments. Designed with advanced electromagnetic and thermal management technology, the IDT series is widely used in automotive manufacturing, battery production, electronics assembly, and precision metal joining processes where consistent weld quality is critical.

Each IDT transformer integrates a highly optimized structure consisting of a rectifier module, high-grade laminated iron core, precision windings, and an efficient water-cooling circulation system. This integrated design ensures stable energy conversion, excellent thermal control, and long-term operational durability even under continuous high-current welding conditions. The water-cooling system effectively reduces temperature rise, maintaining stable performance and extending service life, making the IDT series highly reliable for automated production lines.
One of the key advantages of the IDT series is its low secondary output voltage combined with ultra-high current capacity, enabling concentrated energy delivery directly to the welding point. This results in rapid current rise time, improved welding response speed, and stronger weld penetration. The system minimizes energy loss while maximizing welding efficiency, making it ideal for precision resistance welding tasks such as copper wire welding, battery tab welding, and fine metal component assembly.
The IDT transformers support flexible operating frequency options, allowing seamless switching between 1KHz and 4KHz medium frequency modes. This wide frequency adaptability enables users to optimize welding parameters based on different materials, thicknesses, and process requirements. Lower frequencies provide deeper penetration for heavier materials, while higher frequencies deliver finer control and reduced heat input for delicate components. This flexibility significantly enhances process adaptability and production efficiency.
When paired with advanced resistance welding controllers and intelligent power supplies, the IDT series forms a complete high-precision welding system. It ensures stable current output, precise energy regulation, and excellent synchronization with modern digital control systems. This makes it especially suitable for use in automated welding machines, robotic welding stations, and high-speed production environments requiring strict process consistency.
The IDT Series is available in multiple power configurations, including URD-90, URD-130, and URD-180 models, providing scalable solutions for different welding power requirements. Whether used for light-duty precision welding or heavy-duty industrial applications, the series delivers consistent performance and reliable energy output across all operating conditions.
In addition to performance stability, the IDT transformers are designed with a compact and robust structure, making them easy to integrate into various welding systems. Their high thermal efficiency, low energy consumption, and strong anti-interference capability ensure smooth operation even in complex industrial environments.

| Model | URD-90 | URD-130 | URD-180 | URD-240 | URD-350 |
| Supply Voltage | PWM 500V | PWM 500V
| PWM 500V
| PWM 500V | PWM 500V |
| Rated Power | 90KVA | 130KVA | 180KVA | 240KVA | 350KVA |
| Rated Primary Voltage | 500V | 500V
| 500V
| 500V | 500V |
| No Load Secondary Voltage | 9.1V
| 10V
| 10V
| 12.5V | 12.5V |
| No-Load Loss | 20000(50%) | 30000(50%)
| 40000(50%)
| 50000(50%) | 60000(50%) |
| Cooling Method | Water Cooling |
| Input Frequency | 1khz or 4khz | 1khz |
| Transformer Volume Ratio | 55:1 | 55:1 | 40:1 | 44:1 | 40:1 |
| Dimension(L*W*H) | 150 * 106 *282mm | 150 * 106 * 322mm | 162 * 127 * 345mm | 180 * 150 * 400mm | 340 * 220 * 440mm |
| Weight | 13.9KG | 16KG | 24KG | 48KG | 70KG |