GAOHUI 750V 200A High-Voltage Pulsed Plasma Electrolytic Oxidation Rectifier for Micro-Arc Oxidation Surface Treatment

Part 1: Key Features & Engineering Highlights

– Engineered specifically for the demanding Plasma Electrolytic Oxidation (PEO) process, this GAOHUI industrial high frequency rectifier factory solution delivers a stable 750V DC output at 200A, enabling precise formation of dense ceramic oxide layers on lightweight alloys such as magnesium, aluminum, and titanium.
– As a leading IGBT rectifier manufacturer, we integrate advanced IGBT switching technology to achieve microsecond-level fault response time, ensuring process stability under the high-voltage arcing conditions inherent to micro-arc oxidation.
– Our heavy-duty DC power supply price reflects a direct-from-factory model, providing cost-effective access to a custom current voltage rectifier capable of sustaining continuous pulsed power for advanced ceramic layer growth without voltage drop.
– The unit features a fully programmable pulse profile, allowing precise control of duty cycle (1-100%) and frequency (1-3000Hz), critical for tailoring the coating microstructure during high voltage spark anodizing of reactive metals.
– Designed for industrial 24/7 operation, the water-cooled chassis dissipates heat efficiently, maintaining component integrity during prolonged PEO runs where workpiece surfaces undergo intense localized plasma discharges.

Part 2: Technical Specifications Table

Part 3: Advanced Built-in Protection Systems

The GAOHUI 750V 200A PEO rectifier incorporates a multi-layer protection architecture designed for the unique hazards of plasma electrolytic oxidation. Over-voltage protection (OVP) and over-current protection (OCP) are set with adjustable thresholds to prevent catastrophic arc flash damage to the workpiece or the power supply itself. A dedicated short-circuit protection system reacts within microseconds to clear any direct short between anode and cathode. Thermal overload protection monitors both IGBT junction temperatures and coolant flow rate, triggering an automatic shutdown if the cooling loop fails. Additionally, an input phase-loss detection circuit prevents single-phasing damage to the main transformer. All protection events are logged with timestamps in the internal memory for post-process troubleshooting.

Part 4: Target Industrial Applications

This power supply is purpose-built for high-voltage surface engineering processes, including plasma electrolytic oxidation (PEO) and micro-arc oxidation (MAO) of magnesium alloys for lightweight automotive components. It is also ideal for hard anodizing of aluminum in aerospace structural parts, where thick, wear-resistant oxide layers are required. The unit supports precious plating on titanium medical implants, where precise voltage control prevents substrate damage. Additional applications include electrowinning of reactive metals from molten salts, and high voltage spark anodizing for decorative finishes on consumer electronics housings. The pulsed output is also effective for ceramic layer passivation of steel components in corrosive environments.

Part 5: Customization and Tailored Engineering Services

As a factory-direct custom current voltage rectifier specialist, GAOHUI offers full customization from 1V to 1000V and 1A to 100,000A, AC-DC only. For this PEO rectifier, we can integrate a Digital Process Timer to automate run cycles and ensure consistent coating thickness. A Multi-Stage Programmable Profile Control module allows you to pre-set voltage ramps, hold times, and pulse parameter changes across up to 100 steps. An Ampere-Minute Integrator provides real-time charge calculation for precise coating mass control. For specialized coatings, we offer an Automatic Reverse Polarity function to strip and reform layers in situ. The Soft-Start Ramp-Up feature gradually increases voltage to avoid initial arc damage to thin substrates. Control options include Local/Remote via Push-Button or HMI Touch Screen, with full data logging to USB or network storage. Communication interfaces include RS485 Modbus RTU, Ethernet IP, 4-20mA analog input, and Pulse Functions with 1-100% duty cycle and 1-3000Hz frequency independently adjustable. Each unit undergoes a 72-hour burn-in test at full rated load before shipment.