Technical differences between HFDC and MFDC welding power supplies and analysis of Huandian's optimization and upgrade

In the field of modern precision welding, DC high-frequency welding power supply and DC medium-frequency welding power supply are two mainstream power supply types, each with welding power supply own characteristics, and are widely used in electronics, automobiles, batteries, hardware and other industries. There are significant differences between the two in terms of control accuracy, welding quality, energy consumption performance and equipment adaptability.

DC medium-frequency welding power supply usually uses an output frequency of 1kHz to 4kHz, and resistance welding supplies power to the inverter module after three-phase rectification, and then the welding transformer outputs the welding current. This solution has a high energy efficiency ratio and strong welding penetration, which is suitable for welding of high thermal conductivity metals such as aluminum and stainless steel, but is slightly insufficient in ultra-fine welding and complex waveform control.

DC high-frequency welding power supply generally has an operating frequency higher than 20kHz, and DC high-frequency welding power supply response speed is faster, which can achieve more precise current waveform control, especially suitable for microelectronics, medical equipment and new energy battery industries that have extremely high requirements for welding heat control. In addition, the high-frequency characteristics make the equipment smaller, more efficient, and narrower in heat-affected zone, which helps to improve the consistency of welding quality.

Huandian has deep accumulation in both of the above two welding power supply technologies, and continuously optimizes product performance through the self-developed IDP series (high frequency) and IDW series (medium frequency). Especially in terms of control algorithms and intelligent functions, Huandian has made the following optimizations:

1. Multi-stage discharge control: Supports 4~8 current settings. Users can accurately set preheating, main welding, slow-down and other stages to achieve a softer and more stable welding process.

2. Current monitoring and alarm system: Built-in real-time monitoring functions such as current, voltage, displacement, and pressure, combined with abnormal judgment logic, improve the self-protection ability of the equipment and welding traceability.

3. Intelligent communication interface: Supports multiple industrial protocols such as Modbus, EtherNet/IP, Profinet, etc., which is convenient for integration into MES systems and welding group control platforms, helping enterprises to achieve intelligent manufacturing.

4. Automatic temperature drift compensation technology: Effectively deal with parameter drift after long-term work to ensure long-term stability of welding quality.

In general, DC high-frequency resistance welding supplies are more suitable for applications that require extremely high welding accuracy and speed, while DC medium-frequency resistance welding supplies are more cost-effective in welding large currents and large workpieces. In line with market demand, Huandian has upgraded both power supply technologies to be modular, intelligent, and precise, becoming a reliable partner in the field of precision welding equipment.