This MAO pulse rectifier is a precision power supply for ceramic coating R&D. It generates stable high-voltage pulses to support reliable micro-arc oxidation, while forming dense, wear-resistant ceramic layers on light metal alloys—including aluminum, magnesium and titanium. With fine parameter control, it enables accurate plasma electrolytic oxidation studies and ensures consistent control over coating microstructure and surface properties.
| Parameter | Specification |
|---|---|
| Input Power | 380VAC Three-Phase, 50/60Hz |
| DC Output | 0–750V / 0–20A |
| Pulse Mode | Single-Pulse Operation |
| Pulse Frequency | 10–2000 Hz Adjustable |
| Duty Cycle | 5–80% Adjustable |
| Rise Time | < 50 µs |
| Control Accuracy | ≤ ±1% |
| Control Interface | Touchscreen HMI with Recipe Storage |
| Cooling System | Forced Air Cooling |
| Protections | Arc Detection, OVP, OCP, OTP, Short Circuit |
| Single Pulse | ||||||
| No. | Model | Forward Current (A) | Forward Voltage (V) | Input Voltage (V) | Cooling Method | W×L×H (mm) |
| 1 | 5A750V | 5 | 750 | 220 | Air-cooled | 290×520×190 |
| 2 | 10A750V | 10 | 750 | 380 | Air-cooled | 510×560×230 |
| 3 | 20A750V | 20 | 750 | 380 | Air-cooled | 560×760×320 |
| 4 | 30A750V | 30 | 750 | 380 | Air-cooled | 560×760×320 |
| 5 | 50A750V | 50 | 750 | 380 | Air-cooled | 520×580×930 |
| 6 | 100A750V | 100 | 750 | 380 | Air-cooled | 580×650×1650 |
| 7 | 200A750V | 200 | 750 | 380 | Water-cooled | 850×1130×1630 |
| 8 | 300A750V | 300 | 750 | 380 | Water-cooled | 800×1270×1700 |
| 9 | 500A750V | 500 | 750 | 380 | Water-cooled | 800×1270×1900 |
| Dual Pulse | ||||||||
| No. | Model | Forward Current (A) | Forward Voltage (V) | Reverse Current (A) | Reverse Voltage (V) | Input Voltage (V) | Cooling Method | Dimensions (mm) |
| 1 | 10A750V | 10 | 750 | 3 | 300 | 380 | Air-cooled | 510×560×230 |
| 2 | 30A750V | 30 | 750 | 10 | 300 | 380 | Air-cooled | 560×760×320 |
| 3 | 50A750V | 50 | 750 | 15 | 300 | 380 | Air-cooled | 520×580×930 |
| 4 | 100A750V | 100 | 750 | 30 | 300 | 380 | Air-cooled | 580×650×1650 |
| 5 | 200A750V | 200 | 750 | 50 | 300 | 380 | Water-cooled | 850×1130×1630 |
| 6 | 300A750V | 300 | 750 | 100 | 300 | 380 | Water-cooled | 800×1270×1700 |
| 7 | 500A750V | 500 | 750 | 150 | 300 | 380 | Water-cooled | 800×1270×1900 |
Power（KW） = Output Voltage（V） × Output Current（A）
The product comes with a one-year warranty and boasts a service life of over 10 years. It supports both Constant Current and Constant Voltage modes, and it also includes a programmable ramp-up function for current or voltage settings. For time-sensitive applications, you can use the timed operation mode. Moreover, the multi-segment function allows you to vary constant current or voltage levels over time. The device further offers an RS485 communication interface, automatic polarity reversal, and a minute-level timing function. If you need customization, please contact us for further details.
Over all, GAOHUI provides complete single-pulse and dual-pulse models with air-cooled and water-cooled options. Accordingly, these units fit different production scales and process requirements.
Shows the peak voltage of the current pulse, a key parameter affecting coating strength.
Displays the average current over the working cycle to monitor reaction stability.
Set total time: Total process duration.
Total running time: Elapsed working time.
Cumulative ampere-minutes: Total current-time value for coating thickness control.
Multi-station ID for managing different workpiece processes.
Indicates disconnection from remote/host system, local control mode.
Constant current mode, the most common for micro-arc oxidation.
Press to immediately terminate the oxidation process.
Process stage: Current running step in multi-step program.
Ramp-up time: Time for voltage/current to rise to set value, avoiding impact.
Peak voltage limit: Maximum pulse voltage to prevent breakdown.
Frequency (Hz): Pulse working frequency, affects coating density.
Current stage: Current process segment number.
Hold time: Duration of current segment.
Average current setting: Target average current value.
Pulse "on" time percentage in one cycle, affects heat input and coating structure.
Button to start or stop the process.
Toggle between CV and CC control modes.
Pause or resume the ongoing process.
Access multi-step program editor for complex recipes.
Choose between single segment or multi-segment process.
Shows currently loaded/running process recipe.
Opens system configuration menu.
Manufacturer/support contact information.
View historical voltage/current trend graphs.
Visualizes real-time/historical voltage/current curve.
Displays the peak current value of the pulse.
Displays the average voltage over the working cycle.
Shows system date and time.
Shows the peak value of the positive pulse voltage.
Displays the average current of the positive pulse over the working cycle.
Shows the average voltage of the positive pulse over the working cycle.
Displays the peak value of the positive pulse current.
Shows the current running process number.
Sets the time for voltage/current to rise slowly from zero to the set value.
Shows the current running segment number in multi-stage processes.
Sets the duration for the current process segment.
Manufacturer/support contact information.
Shows the average voltage of the negative pulse over the working cycle.
Displays the peak value of the negative pulse current.
Shows the peak value of the negative pulse voltage.
Displays the average current of the negative pulse over the working cycle.
Sets the maximum allowed positive pulse voltage to prevent workpiece breakdown.
Sets the target average current value for the positive pulse.
Set total time: Total process duration.
Total running time: Elapsed working time.
Cumulative ampere-minutes: Total current-time value for coating thickness control.
Opens the system configuration menu.
Accesses the multi-step program editor to create complex recipes.
Selects between running a single segment or a multi-segment process.
Displays the currently loaded or running process recipe.
Temporarily pauses or resumes the ongoing process.
Toggles between constant voltage and constant current control modes.
Multi-station ID for managing different workpiece processes.
Indicates disconnection from the remote/host system, local control mode.
Current operating mode: constant current control.
Press to immediately terminate the oxidation process.
Positive: Pulse frequency, duty cycle, number of pulses.
Negative: Pulse frequency, duty cycle, number of pulses.
Main button to start or stop the entire process.
This MAO pulse rectifier delivers stable pulses up to 750V for consistent plasma discharges. It supports the growth of thick, well-adhered ceramic coatings on light alloys, and it performs especially well on titanium and magnesium materials. Moreover, the high-voltage design ensures uniform and complete coating formation across workpieces.
Frequency and duty cycle are fully adjustable to fine-tune discharge energy. This allows precise control over coating porosity, roughness and growth rate; consequently, researchers can optimize parameters systematically for ideal surface performance. Additionally, it supports flexible testing for various coating development requirements.
The unit uses forced air cooling for steady long-term operation, and no water cooling system or pipelines are needed for daily use. This greatly simplifies installation in research and lab environments, while also reducing maintenance and lowering overall operating costs.
This MAO pulse rectifier offers control accuracy within ±1% for stable tests, and its fast response ensures repeatable and reliable experimental results. Furthermore, built-in data logging supports complete experiment recording and analysis, while recipe storage further improves process traceability for scientific research.
This MAO pulse rectifier supports high-performance coating development for aerospace parts. It helps test coating adhesion, wear resistance and thermal stability effectively, and it improves the durability of lightweight alloys in harsh service environments. In addition, it plays a key role in advanced aviation material research projects.
It enables the preparation of bioactive ceramic coatings for medical implants and supports the development of antibacterial surfaces for orthopedic and dental devices. Optimized pulse parameters help enhance biocompatibility and corrosion resistance, which significantly shortens the research cycle for new implant technologies.
The MAO pulse rectifier supports coating studies on aluminum and magnesium components, helping develop wear-resistant surfaces for engine and chassis parts. It validates lightweight material solutions for modern high-efficiency vehicles and provides reliable data for automotive material innovation.
It serves as an ideal teaching tool for MAO and PEO process demonstrations and supports graduate research in surface engineering and material science. Students gain hands-on experience with advanced ceramic coating technology, which improves both teaching quality and research efficiency in labs.
With 750V output, it processes aluminum, magnesium and titanium alloys, and one machine meets diverse material research needs in different projects. Furthermore, it offers high versatility for multi-material experimental programs.
Adjustable voltage, frequency and duty cycle support in-depth studies, allowing researchers to independently test parameters to analyze coating formation. Additionally, it adapts smoothly to a wide range of research objectives.
No water connections make installation quick and straightforward, and it fits well in compact lab spaces with minimal infrastructure. As a result, daily operation and maintenance become simple and efficient.
Recipe storage and data logging ensure reproducible experiments, and full process documentation improves research reliability and efficiency. For further assistance, contact our technical support team for professional application guidance.
A: Products with the same nominal specifications often serve different industries, and they may carry different detailed parameter requirements. These differences directly affect production costs and technical solutions, so final prices will vary accordingly. For this reason, we recommend you contact us directly to receive a precise and tailored quotation.
A: We assign specialized consultants to support each industry sector. If you need further information, simply reach out to us. After we confirm your request, we will immediately send you the full technical datasheets and product images you need.
A: We focus on custom non-standard industrial power supplies, so we can fully adjust output current and voltage to match your exact needs. The products shown on our website only represent part of our actual range, as we do not list every model online. If you cannot find your desired specifications, please contact us directly. We will work with you to confirm your exact requirements, or we can guide you to select the most suitable parameters based on your industry standards. We will provide complete technical specifications and dimension drawings so you can fully understand the product.
