Plasma Electropolishing – 300V 50A Industrial IGBT Rectifier for Heavy-Duty DC Surface Treatment

The GAOHUI 300V 50A power supply is not a standard electro-polishing unit; it is a high-voltage engineering solution purpose-built for plasma electrolytic polishing (PEP). Operating at a demanding 300 VDC, this rectifier generates the dense, stable plasma envelope required to remove micro-burrs and refine surface roughness on complex metal geometries, including stainless steel, titanium, and aluminum alloys. Designed for factories that require both an industrial high frequency rectifier factory build quality and advanced waveform fidelity, this system replaces lower-voltage SCR units with faster-switching IGBT modules. For procurement teams evaluating a heavy-duty DC power supply price, the GAOHUI delivers a lower total cost of ownership through 92% efficiency and reduced electrolyte heating. As a proven IGBT rectifier manufacturer, we provide a solution that transforms the plasma polishing process from a boutique service into a repeatable, high-volume production step.
Part 1 Key Features & Engineering Highlights
True 0-300 VDC and 0-50 A continuous output range with independent voltage and current limiting regulation, ensuring precise plasma ignition and stable burn-in during the electropolishing cycle. The high-frequency IGBT switching topology (20 kHz) minimizes ripple to below 2%, which is critical for achieving uniform metallic gloss shining across the entire workpiece surface. The galvanically isolated control system prevents ground-loop failures common in high-voltage wet environments. A built-in soft-start ramp eliminates current inrush during plasma initiation, protecting both the workpiece and the power stage.
Part 2 Technical Specifications Table
| Parameter | Specification |
| — | — |
| Input Voltage | 380VAC ± 15%, 3-Phase, 50/60Hz |
| Output Voltage | 0 – 300 VDC (Continuous) |
| Output Current | 0 – 50 A (Continuous) |
| Regulation Mode | Constant Voltage / Constant Current |
| Voltage Ripple | < 2% RMS at Rated Load |
| Switching Frequency | 20 kHz (IGBT Based) |
| Efficiency | 92% at Full Load |
| Cooling Method | Forced Air (Intelligent Fan Control) |
| Protection Grade | IP 21 (Electrical Cabinet) |
| Communication | RS485 Modbus RTU (Standard), Ethernet (Optional), 4-20mA Analog Interface |
| Pulse Function | Adjustable 1 – 3000 Hz, Duty Cycle 0 – 100% |
| Process Timer | 0 – 9999 Minutes with Hold Function |
| Dimensions (WxDxH) | 550 x 650 x 950 mm |
| Net Weight | 115 kg |
Part 3 Advanced Built-in Protection Systems
Industrial plasma polishing environments expose rectifiers to thermal spikes, electrolyte mist, and high-voltage arcs. The GAOHUI series integrates six layers of failsafe protection: over-voltage lockout (adjustable threshold), over-current electronic trip in < 10 microseconds, reverse polarity blocking via solid-state diode, coolant-air temperature sensing with auto-derating, short-circuit proof output bus, and a ground-fault circuit interrupter for electrolyte conductivity hazards. The digital controller logs all fault events with time stamps for predictive maintenance planning.
Part 4 Target Industrial Applications
This unit is primarily deployed for environmentally friendly deburring of surgical instruments, aerospace fasteners, and stampings where mechanical finishing is impossible. The high 300V output is also suitable for plasma electrolytic oxidation (PEO) pre-treatment on aluminum components and for high-voltage pulse corrosion testing of coatings. The rectifier supports multi-stage profile control for ramping voltage during the eco-polishing cycle, delivering a bright, matte, or satin finish depending on set-point sequencing.
Part 5 Customization and Tailored Engineering Services
GAOHUI’s factory capability covers a full spectrum: 1V-1000V, 1A-100,000A, with any input voltage (AC only) and DC output. For plasma electropolishing systems, we frequently integrate an external Ampere-Minute Integrator for precise metal removal thickness, Automatic Reverse Polarity for periodic cleaning cycles, and Multi-Stage Profile Control to pre-set ignition voltage, main polish voltage, and ramp-down. The Pulse Function module (1-3000Hz) enables oxide crack reduction and faster micro-polishing of concave surfaces. All units are delivered with validated RS485 Modbus RTU protocol, Ethernet for MES connectivity, and 4-20mA analog interface for remote PLC control. As a custom current voltage rectifier manufacturer, we can match your plasma tank size, electrolyte type, and production line speed with a unit that meets CE safety standards and factory-floor ruggedness.