Introduction
In large-scale infrastructure projects such as urban pipeline networks, bridge construction, and industrial plant maintenance, field welding requires equipment that combines high output, stable performance, and independent power supply capability. The HW450D digital diesel single-torch welder delivers a rated welding current of 360 A (single mode: 60–400 A), paired with 15.0 KVA of auxiliary three-phase AC power (400 V / 50 Hz), making it a versatile power solution for demanding job-site conditions.
1. Core Architecture and Power Technology
The HW450D adopts a Buck (chopper) topology as its primary circuit platform, controlled by IGBT digital chopping. This architecture offers three distinct advantages:
- High generation efficiency — the diesel engine’s mechanical output is converted to electrical energy with reduced losses, extending continuous operation time per tank of fuel.
- Wide current adjustment range — single-torch mode covers 60–400 A, accommodating electrodes from 2.0 mm to 6.0 mm diameter across all positions.
- Welding stability — dual closed-loop patented control (Invention Patent No. ZL 2019 1 0681162.9) and DFJ (low-spatter) waveform control technology jointly suppress arc fluctuation caused by engine speed variation.
2. Engine and Durability
The HW450D is equipped with a four-stroke, four-cylinder water-cooled diesel engine with a displacement of 1.642 L and a rated output of 26.8 kW at 3000 rpm. Water-cooling maintains the engine within its optimal temperature window even under sustained high-load welding, preventing power derating that air-cooled units experience in high-ambient-temperature environments.
The direct-coupled drivetrain eliminates belt wear and slippage, reducing maintenance frequency. The electrical starting system (12 V) ensures reliable ignition in cold weather. The IP23 protection class and H insulation class guarantee safe operation in dusty and damp outdoor conditions.
3. Dual-Function Capability: Welding + Auxiliary Power
Beyond welding output, the HW450D provides up to 15.0 KVA of auxiliary AC power (400 V, 50 Hz, 22.7 A, 80% duty cycle). This enables operators to run angle grinders, lighting equipment, or pumps directly from the same machine without a separate generator, simplifying logistics and reducing idle equipment on site.
4. Specifications
| Parameter | Value |
|---|---|
| Rated Welding Current (single) | 360 A |
| Current Range (single) | 60–400 A DCA |
| Rated Welding Voltage | 34.4 V DC |
| No-Load Voltage | 85 V DC |
| Rated Duty Cycle | 50% |
| Auxiliary Power | 15.0 KVA / 400 V AC / 50 Hz |
| Auxiliary Duty Cycle | 80% |
| Engine | 4-cylinder, water-cooled diesel |
| Rated Engine Wwput | 26.8 kW @ 3000 rpm |
| Fuel Tank Capacity | 75 L |
| Dimensions (L×W×H) | 1530×710×865 mm |
| Net Weight | 550 kg |
| Protection / Insulation | IP23 / Class H |
5. Application Scenarios
The HW450D is designed for field welding operations including urban pipeline construction, bridge structural steel fabrication, disaster relief infrastructure repair, and industrial plant piping. Its single-torch configuration is particularly suited to projects where one experienced welder handles the majority of work, or where access space is limited.
Conclusion
The HW450D digital diesel single-torch welder integrates high-current welding capability with auxiliary power generation in a compact, robust package. Its water-cooled diesel engine, IGBT Buck topology, and dual closed-loop control system make it a reliable choice for field professionals who demand consistent weld quality across extended shifts and challenging environments.
Contact Us
Tel: 010-86468776 • Email: denoh@126.com • Website: wwww.denohgroup.com