Plasma Rectifier Introduction

This 100A 750V plasma rectifier delivers specialized high-voltage, pulsed DC power. Specifically, it is essential for the Plasma Electrolytic Oxidation process. Additionally, it generates and sustains controlled micro-discharges. These occur on the surface of light metals like aluminum, magnesium, and titanium. Consequently, it transforms the surface layer into a dense, hard ceramic oxide coating. Furthermore, this plasma rectifier ensures consistent, repeatable results for industrial applications.

Technical Specifications

Parameter	Specification
Input Power	380VAC Three-Phase, 50/60Hz
DC Output	0-750V DC / 0-100A (Pulsed/Bipolar)
Pulse Frequency	50-2000 Hz Adjustable
Duty Cycle	5%-80% Adjustable
Output Mode	DC, Unipolar Pulse, Bipolar Pulse (AC-like)
Control Interface	Industrial IPC with Coating Recipe Database
Special Features	Real-time Arc Discharge Monitoring, Automatic Energy Control per Layer, Coating Thickness Estimator
Cooling	Water Cooling
Protections	OCP, OVP, Arc Fault, Dielectric Breakdown, Water Flow/Temperature Interlock

Specifications and Models Table

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.

Single & Dual Pulse MAO Experimental System Models

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.

Single-Pulse Interface

1. Peak Voltage

Shows the peak voltage of the current pulse, a key parameter affecting coating strength.

2. Average Current

Displays the average current over the working cycle to monitor reaction stability.

3. Set Total Time / Total Running Time / Cumulative Ampere-Minutes

Set total time: Total process duration.

Total running time: Elapsed working time.

Cumulative ampere-minutes: Total current-time value for coating thickness control.

4. Station Number

Multi-station ID for managing different workpiece processes.

5. Offline

Indicates disconnection from remote/host system, local control mode.

6. Constant Current (CC)

Constant current mode, the most common for micro-arc oxidation.

7. Stop

Press to immediately terminate the oxidation process.

8. Process Stage / Ramp-Up Time

Process stage: Current running step in multi-step program.

Ramp-up time: Time for voltage/current to rise to set value, avoiding impact.

9. Peak Voltage Limit / Frequency (Hz)

Peak voltage limit: Maximum pulse voltage to prevent breakdown.

Frequency (Hz): Pulse working frequency, affects coating density.

10. Current Stage / Hold Time / Average Current Setting

Current stage: Current process segment number.

Hold time: Duration of current segment.

Average current setting: Target average current value.

11. Duty Cycle (%)

Pulse "on" time percentage in one cycle, affects heat input and coating structure.

12. Start / Stop

Button to start or stop the process.

13. Constant Voltage (CV) / Constant Current (CC)

Toggle between CV and CC control modes.

14. Pause / Run

Pause or resume the ongoing process.

15. Process Programming

Access multi-step program editor for complex recipes.

16. Single-Segment / Multi-Segment

Choose between single segment or multi-segment process.

17. Current Process

Shows currently loaded/running process recipe.

18. Settings

Opens system configuration menu.

19. Contact Us

Manufacturer/support contact information.

20. Playback Controls

View historical voltage/current trend graphs.

23. Process Trend Graph

Visualizes real-time/historical voltage/current curve.

24. Peak Current

Displays the peak current value of the pulse.

25. Average Voltage

Displays the average voltage over the working cycle.

26. Date & Time Display

Shows system date and time.

Dual-Pulse Interface

1. Positive Peak Voltage

Shows the peak value of the positive pulse voltage.

2. Positive Average Current

Displays the average current of the positive pulse over the working cycle.

3. Positive Average Voltage

Shows the average voltage of the positive pulse over the working cycle.

4. Positive Peak Current

Displays the peak value of the positive pulse current.

5. Process

Shows the current running process number.

6. Ramp-Up Time

Sets the time for voltage/current to rise slowly from zero to the set value.

7. Current Segment

Shows the current running segment number in multi-stage processes.

8. Hold Time

Sets the duration for the current process segment.

9. Contact Us

Manufacturer/support contact information.

10. Negative Average Voltage

Shows the average voltage of the negative pulse over the working cycle.

11. Negative Peak Current

Displays the peak value of the negative pulse current.

12. Negative Peak Voltage

Shows the peak value of the negative pulse voltage.

13. Negative Average Current

Displays the average current of the negative pulse over the working cycle.

14. Positive Peak Voltage Limit

Sets the maximum allowed positive pulse voltage to prevent workpiece breakdown.

15. Positive Average Current Setting

Sets the target average current value for the positive pulse.

16. Set Total Time / Total Running Time / Cumulative Ampere-Minutes

Set total time: Total process duration.

Total running time: Elapsed working time.

Cumulative ampere-minutes: Total current-time value for coating thickness control.

17. Settings

Opens the system configuration menu.

18. Process Programming

Accesses the multi-step program editor to create complex recipes.

19. Single-Segment / Multi-Segment

Selects between running a single segment or a multi-segment process.

20. Current Process

Displays the currently loaded or running process recipe.

21. Pause / Run

Temporarily pauses or resumes the ongoing process.

22. Constant Voltage (CV) / Constant Current (CC)

Toggles between constant voltage and constant current control modes.

23. Station Number

Multi-station ID for managing different workpiece processes.

24. Offline

Indicates disconnection from the remote/host system, local control mode.

25. Constant Current (CC)

Current operating mode: constant current control.

26. Stop

Press to immediately terminate the oxidation process.

27. Positive/Negative Pulse Parameters

Positive: Pulse frequency, duty cycle, number of pulses.

Negative: Pulse frequency, duty cycle, number of pulses.

28. Start / Stop

Main button to start or stop the entire process.

Key Features

• High-Voltage Capability for Ceramic Layer Growth: Firstly, this plasma rectifier provides up to 750V. Specifically, it initiates and sustains plasma discharges. These discharges are necessary for forming thick ceramic coatings. Coatings can reach up to 200+ μm. Therefore, it enables exceptional wear resistance. Additionally, it provides thermal insulation and corrosion protection. Furthermore, these coatings are integral to the substrate.
• Precise Pulse Control for Coating Quality: Secondly, adjustable pulse frequency allows fine-tuning. Specifically, duty cycle and bipolar output control plasma intensity. Additionally, they control discharge distribution. As a result, this plasma rectifier controls coating porosity. It also controls phase composition, such as α-Al₂O₃ versus γ-Al₂O₃. Moreover, it controls surface roughness and growth rate. Thus, it delivers tailored performance for specific applications.
• Intelligent Process Automation: Moreover, the system can store complex recipes. These recipes are for different alloys and coating specifications. Additionally, real-time discharge monitoring ensures stability. Furthermore, automatic energy adjustment optimizes results. Thus, this plasma rectifier supports repeatability. It also supports multi-layer deposition for optimal coating structure.
• Water-Cooled Reliability for High-Power Duty: Finally, the integrated closed-loop water-cooling system manages heat efficiently. Specifically, it handles significant heat from high-power plasma processing. Therefore, it ensures continuous, stable operation. This applies to long coating cycles. Additionally, it protects sensitive power electronics. Thus, it prevents thermal stress damage.

Applications & Advantages

This advanced plasma rectifier unlocks the potential of micro-arc oxidation. These applications include, for example:

In Aerospace & Defense, it applies wear-resistant coatings. Additionally, it provides thermal barrier and anti-corrosion coatings. These are for aircraft and engine components made from lightweight alloys. Importantly, the coating's excellent adhesion provides durability. Furthermore, its ceramic nature withstands extreme environments. All this occurs without adding significant weight. Therefore, this plasma rectifier supports critical aerospace applications.

For Automotive & Racing, it enhances surface hardness. Additionally, it improves corrosion resistance. It also enhances thermal properties of magnesium and aluminum engine blocks. These include pistons and structural parts. Additionally, the process is environmentally friendly. It uses aqueous electrolytes. It produces no heavy metal waste. Thus, this plasma rectifier enables sustainable manufacturing.

In Biomedical Implants, it creates biocompatible ceramic surfaces. Specifically, these are bioactive surfaces on titanium and magnesium implants. Ultimately, this promotes osseointegration. This means bone bonding. Furthermore, it can control the implant's degradation rate. Thus, this plasma rectifier supports medical device innovation.

For Research & Development, scientists utilize this plasma rectifier. Specifically, they investigate PEO mechanisms. Additionally, they develop new coating formulations. Furthermore, they optimize surface properties for emerging applications. Therefore, it serves as an essential tool for advancing surface engineering technology.

Finally, this 100A 750V plasma rectifier is the core of a sophisticated platform. For this reason, it is indispensable for research institutions. It is also indispensable for manufacturers. These organizations push the boundaries of material performance. Thus, it offers a versatile, powerful, and controllable solution. It creates next-generation ceramic-metal composites.

Why Choose This Plasma Rectifier?

High-Power Capability: Firstly, the unit delivers 100A at up to 750V. Therefore, this rectifier enables thick, dense ceramic coatings. Additionally, it supports large component processing.

Precision Pulse Control: Secondly, adjustable frequency allows fine-tuning. Specifically, duty cycle control optimizes processes. Thus, this plasma rectifier delivers exceptional versatility.

Intelligent Automation: Moreover, recipe storage ensures consistent results. Additionally, real-time monitoring optimizes coating structure. Therefore, this plasma rectifier reduces operator error.

Water-Cooled Reliability: Finally, the closed-loop cooling system supports continuous operation. Specifically, it handles high-power production cycles. Thus, this plasma rectifier ensures long-term reliability.

Frequently Asked Questions (FAQs) About Gaohui Power Supply

Q: Do you have a price list for your products?

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.

Q: How can I obtain detailed technical specifications and images for a specific product?

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.

Q: What should I do if I cannot find the specific output current and voltage specifications I require?

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.