GAOHUI Heavy Duty Plasma Electropolishing DC Power Supply (400V 50A) for Industrial Surface Treatment

The GAOHUI 400V 50A plasma electropolishing rectifier is engineered as the definitive electrolytic surface treatment solution for achieving a flawless, mirror-like finish on complex metal alloys. Operating as a high-voltage DC current source, this unit creates the precise anodic potential difference required to dissolve surface micro-peaks without etching grain boundaries. As a professional IGBT rectifier manufacturer, we deliver a fully controlled unit that provides the exacting voltage stability necessary for titanium, stainless steel, and nitinol medical implants, ensuring ionic-level precision with every cycle. This plasma polishing DC power supply replaces traditional acid-etching methods with a clean, repeatable electrochemical process that maintains workpiece dimensional integrity while eliminating surface contaminants and the brittle alpha-case layer.
PART 1: KEY FEATURES AND ENGINEERING HIGHLIGHTS
This system is built around a high-frequency IGBT switching topology that allows for instantaneous voltage response without the bulky low-frequency transformers found in older designs. The unit supports both constant voltage (CV) and constant current (CC) regulation modes, automatically cross-overing to protect the plasma arc from current spikes. The digital signal processor controls the thyristor firing angles to ensure that output ripple remains below 1%, which is critical for preventing striation or rough finish on polished parts.
The user interface features a fully numeric LED display and membrane keypad, allowing operators to preset the electropolishing voltage within the 400V range and the process current up to 50A. As an industrial high frequency rectifier factory, we prioritize thermal management; the unit employs forced-air cooling with a temperature-controlled fan system, ensuring duty-cycle reliability even under continuous heavy-load factory shifts. The device also includes an automatic phase-loss detection and a soft-start function to prevent inrush current damage when connecting to production line busbars.
PART 2: TECHNICAL SPECIFICATIONS TABLE

PART 3: ADVANCED BUILT-IN PROTECTION SYSTEMS
Operating in a chemical fume environment requires robust electronic safeguarding. This rectifier features comprehensive short-circuit protection across the DC output terminals, triggering a full shut-down in under 2 milliseconds to prevent welds on the polished part. Over-heat protection uses dual redundant thermistors on the IGBT module base-plate; when internal ambient temperatures reach 75°C, the control circuit linearly de-rates the output current before tripping.
Electrical surge isolation is provided by a reinforced galvanic isolation transformer, protecting the logic controls from transient voltage surges generated by the plasma polishing tank. The unit also monitors output current leakage to ground, ensuring operator safety in wet processing areas. Additionally, the stored parameter memory holds up to 10 distinct recipes, allowing plant engineers to recall specific voltage/current ramps for different metal alloys without manual recalibration.
PART 4: TARGET INDUSTRIAL APPLICATIONS
This specific 400V 50A configuration is ideal for semiconductor coating lines, PCB manufacturing, and surgical implant finishing. In the medical sector, this unit performs rapid surface smoothing of cobalt-chrome knee implants, where high voltage creates a specific plasma sheath thickness that eliminates mechanical tooling marks. For aerospace applications, the system prepares titanium fan blades for bonding by removing the oxidation layer created during heat treatment.
It is also widely deployed in the jewelry industry for casting finishing and in the food processing sector to polish stainless steel storage vats, meeting hygienic surface criteria. The high DC voltage differential ensures that a viscous diffusion layer forms at the anode, aiding the removal of hydroxide ions for a bright, stress-free surface.
PART 5: CUSTOMIZATION AND TAILORED ENGINEERING SERVICES
As a custom current voltage rectifier specialist, GAOHUI does not restrict you to this standalone specification. We offer full engineering flexibility covering the entire spectrum from 1V to 1000V and 1A to 100,000A, ensuring a perfect match for your electrolytic bath volume and throughput needs.
Our customization options include a Process Timer for automated cycle termination, a Multi-Stage Profile Control that allows programming of ramped voltage steps, and an Ampere-Minute Integrator to quantify total charge passed for plating thickness calculation. For parts that require alternating treatment, an Automatic Reverse Polarity module cycles the output between anode and cathode. For specialized pulse polishing, we offer Pulse Functions adjustable from 1Hz to 3000Hz with adjustable duty cycle, allowing super-finishing of micro-features.
Furthermore, all units can be fitted with remote control boxes for distant operation and standard analog interface cards (4-20mA) to integrate with PLC master controls. Whether you need master-slave parallel operation for a 100,000A line or a bench-top unit for laboratory R&D, the factory design team provides CAD drawings and thermal simulation support before final build. For inquiries regarding heavy-duty DC power supply price and lead times, contact our sales engineering team for a quote tailored to your exact production specification.