750V 200A MAO Surface Treatment Power Supply

The 750V 200A MAO Surface Treatment Power Supply is a unidirectional DC power supply rated at 750 V and 200 A for plasma electrolytic oxidation (PEO/MAO) projects. The published rating defines the available DC envelope; it does not replace process calculations or establish the normal operating setpoint.

Published Rating and Electrical Boundary

Rated DC output	750 V DC, 200 A DC
Application	plasma electrolytic oxidation (PEO/MAO)
Regulation	Constant-current or constant-voltage main mode, selected for the confirmed process
AC input	AC 380 V or 415 V. Final phase, frequency and site conditions must be confirmed.

This product follows Gao Hui’s low-voltage AC input, high-frequency switching and isolation, one-way DC architecture. It is not presented as an external DC-input converter, AC-output source, bidirectional or regenerative supply, or medium/high-voltage direct-input system.

Application and Selection

This page applies to high-field oxide coating with micro-discharge on a defined valve metal and electrolyte Initial current may be estimated from effective area and a process-supplied current density, but stage curves and peaks must come from the PEO process owner. Positive and any negative voltage/current limits, waveform, frequency, pulse widths, duty cycles and stage transitions require separate confirmation.

PEO/MAO is not ordinary anodizing; DC, unipolar pulse and bipolar pulse requirements cannot be inferred from the material name.

Load-data focus: selection should start with effective area, cell or stack arrangement, chemistry and the maximum simultaneous production load. A product name alone is not enough for final sizing.

Information Required for Selection

• PEO or MAO process name
• alloy and effective area
• electrolyte and temperature
• target coating objective
• positive voltage and current limits
• any negative output limits
• waveform and stage curve
• cooling, interlocks and batch control

Also provide the site AC voltage, phase and frequency; cable distance; daily duty; ambient conditions; cabinet location; required local or remote control; and any interface or interlock list. Gao Hui engineering can then check the practical working range against the published rating.

Configuration Boundary

The confirmed standard scope is limited to the published DC rating and stated process use. Cooling method, enclosure, control interface, ramp, timer, ampere-hour control, pulse waveform, polarity reversal, communications, ripple target and redundancy are project-specific. They are supplied only when written into the confirmed configuration and must not be inferred from a legacy title, image or category.

Frequently Asked Questions

Is the rated current the normal process current?

No. The rating is the product ceiling; the working setpoint must follow the validated process window and actual load.

Can the process name determine the final voltage?

No. Loaded voltage depends on chemistry or load behavior, spacing, contacts, conductors and the production arrangement.

Are pulse, reversal and communications included?

Only when they are written into the confirmed configuration. They are not assumed from the product title.

Review related options in Anodizing Rectifiers, or contact Gao Hui with the selection data above.