Heavy Duty PEO Power Supply (750V 200A) for Ceramic Coating Excellence

EXECUTIVE SUMMARY
Engineered specifically for the plasma electrolytic oxidation (PEO) micro-arc regime, this programmable high frequency switching rectifier delivers the precise voltage and waveform control required to form advanced ceramic layers on lightweight alloys. Operating across a voltage window of 250V to 750V, it provides the sustained pulse output necessary to maintain a stable plasma discharge. As a professional IGBT rectifier manufacturer, we build each unit to withstand continuous heavy-duty operation, offering a superior balance of energy efficiency and process repeatability.
Part 1 Key Features and Engineering Highlights
Advanced IGBT technology ensures rapid switching and low ripple, directly improving coating density and adhesion. The unit features a fully programmable pulsed DC output with frequency adjustment from 1Hz to 3000Hz, allowing precise control of the micro-arc energy for varying alloy compositions. Our platform delivers a stable maintenance arc even under fluctuating load conditions, critical for high voltage spark anodizing of large parts. We operate as an industrial high frequency rectifier factory, so every PCB assembly, bus bar, and control board is subject to rigorous burn-in testing.
Part 2 Technical Specifications Table
Parameter | Specification | Notes
— | — | —
Rated Output Voltage | 0-750V DC | Continuous adjustable
Rated Output Current | 0-200A DC | Continuous adjustable
Input Voltage | 380VAC ±10%, 3-Phase | 50/60Hz
Output Type | Unipolar Pulse / DC | Programmable
Pulse Frequency | 1Hz – 3000Hz | Square wave
Voltage Regulation | ≤ 1% | Full load range
Current Ripple | ≤ 3% RMS | At rated output
Cooling Method | Forced Air | Smart fan speed control
Display | 7” Touchscreen HMI | Real-time waveform
Dimensions | 900 x 800 x 1800 mm | Standard cabinet
Weight | Approx. 320 kg
Part 3 Advanced Built-in Protection Systems
Reliability in production environments demands robust safeguards. This rectifier incorporates instantaneous over-voltage crowbar protection, over-current electronic limiting with auto-recovery, and phase loss detection for incoming 3-phase power. Thermal management includes dual NTC sensors on the IGBT heat sink with staged derating to prevent thermal runaway. An output ground fault monitoring system immediately interrupts the main contactor upon detecting leakage currents exceeding safe thresholds, protecting both the workpiece and the operator.
Part 4 Target Industrial Applications
This heavy-duty DC power supply is purpose-built for plasma electrolytic oxidation (PEO) and micro arc oxidation (MAO) of aluminum, titanium, magnesium, and their alloys. It excels in forming thick, hard ceramic coatings for aerospace components, automotive engine parts, and defense equipment. The high voltage window makes it ideal for advanced ceramic layer formation on lightweight alloys where conventional anodizing cannot achieve sufficient dielectric breakdown. Additionally, it supports specialized processes such as plasma electrolytic saturation (PES) and electrophoretic deposition (EPD) of ceramic precursors.
Part 5 Customization and Tailored Engineering Services
As a reputable custom current voltage rectifier supplier, we configure every unit to your exact process. Standard customization ranges from 1V to 1000V and 1A to 100,000A, with AC input and DC output only. We integrate auxiliary modules including: Process Timer for automated cycle termination, Multi-Stage Profile Control supporting up to 50 programmable steps, Ampere-Minute Integrator for precise coating thickness control, Automatic Reverse Polarity for bipolar PEO modes, and Soft-Start to prevent bath shock. Communication interfaces include RS485 Modbus RTU, Ethernet for remote monitoring, and 4-20mA analog control. For pulse-dependent processes, we offer pulse functions from 1Hz to 3000Hz adjustable duty cycle. Contact our engineering team to discuss your exact voltage, current, and waveform requirements. When evaluating heavy-duty DC power supply price, consider the total lifetime cost of ownership – our units are built for a decade of service with readily available spare parts.