GAOHUI GA-HF 15V 1000A Electropolishing Power Source IGBT Rectifier for Electrolytic Deburring Passivation

Executive Summary
This GAOHUI GA-HF series unit delivers precise 15V at 1000A of pure, regulated DC power specifically engineered for electropolishing, electrochemical deburring, and passivation processes. Unlike standard welding power sources or rectifiers that produce ripple and unstable current, this unit provides the stable, low-voltage, high-current output required to achieve a mirror-like surface finish on stainless steel, aluminum, and titanium alloys. As a specialized industrial high frequency rectifier factory with over two decades of experience, GAOHUI ensures your production line runs without the common current drop issues reported with generic units. This rectifier eliminates the frustration of amps that “don’t budge” at low voltages, providing true linear control from zero to full output.
Part 1 Key Features & Engineering Highlights
True Zero-Start Linear Regulation: Most electropolishing rectifiers fail at low voltage due to SCR firing angle limitations. Our IGBT design with hall-effect current sensing ensures stable output down to 1 Volt, solving the common problem of amp output refusing to respond at low settings. You achieve consistent metal removal rates even on parts with complex geometries.
High Frequency Switching Topology: Operating at 20kHz to 50kHz, this design minimizes the large filter capacitors required by traditional line-frequency units. The result is a compact footprint with a ripple factor of less than 1% RMS, critical for achieving a specular (mirror) finish rather than a matte or streaked surface.
Advanced Digital Control Core: A 32-bit DSP processor governs the pulse and constant current/constant voltage (CC/CV) modes. This enables precise current density management across the part surface, preventing the pitting or etching associated with analog-controlled units.
Part 2 Technical Specifications Table
| Parameter | Specification | Notes |
| — | — | — |
| Model Number | GA-HF-151000 | GAOHUI Electropolishing Series |
| Input Voltage | AC 380V ± 15%, 3-Phase, 50/60Hz | Other voltages available on request |
| Output Voltage Range | 0 – 15V DC | Continuous adjustable |
| Output Current Range | 0 – 1000A DC | Continuous adjustable, linear at low end |
| Output Type | DC / Pulsed DC | Square wave pulse |
| Pulse Frequency | 1Hz – 3000Hz | Adjustable, duty cycle 1-99% |
| Ripple / Noise | ≤ 1% (full load) | Essential for surface finish |
| Regulation Mode | Constant Current (CC) / Constant Voltage (CV) | Automatic cross-over |
| Display | Digital Touch Screen | Real-time V, A, Ah, kWh |
| Efficiency | > 90% | IGBT technology |
| Cooling Method | Forced Air / Water Cooling (Option) | Industrial duty fan |
| Operating Temperature | -10°C to +50°C | |
Part 3 Advanced Built-in Protection Systems
This unit is designed for the harsh conditions of wet chemical surface finishing. The protection suite exceeds standard offerings, safeguarding both the capital equipment and your work-in-progress parts.
Insulated Gate Bipolar Transistor (IGBT) Over-Current Protection: Instantaneous shutdown at 110% rated current, preventing module failure during tank short-circuits.
Liquid Level and Flow Interlock: An optional but recommended feature stops output if the electrolyte circulation pump fails or if the solution level drops below the anode rod, preventing dry-burn damage.
Thermal Overload with Derating Curve: Unlike simple thermal trip switches, our system mathematically reduces output current at elevated ambient temperatures, allowing the process to continue safely rather than triggering an abrupt shutdown mid-batch.
Output Phase Loss Detection: Monitors AC input for unbalanced supply phases, a common cause of electrolytic ripple that ruins passivation quality.
Part 4 Target Industrial Applications
Designed for the most demanding electrochemical surface treatment processes, where output stability directly determines product quality.
Stainless Steel Electropolishing: Delivers the high current density (5-30 A/dm²) required for selective surface leveling. Achieves a bright, passive, corrosion-resistant surface for food processing, pharmaceutical, and semiconductor equipment. The pulse function is critical here to break the viscous boundary layer during polishing of complex holes and tubes.
Electrochemical Deburring (ECD): Uses the 1000A output to generate rapid anodic dissolution on burrs and sharp edges, especially on intersecting holes in transmission components and hydraulic valve bodies. The soft-start ramp prevents shock to delicate burrs.
Mirror Finish Polishing (Metallographic Prep): For lab or production environments requiring a defect-free surface. The <1% ripple ensures no microscopic surface orange peel effect, which is a common defect when using unfiltered DC from standard rectifiers.
Part 5 Customization and Tailored Engineering Services
Every electrolytic bath is different. The "one-size-fits-all" approach from generic heavy-duty DC power supply price lists fails in practice. GAOHUI provides a factory-level IGBT rectifier manufacturer service that matches the waveform to your chemistry and part geometry. Our engineers will consult with you regarding custom current voltage rectifier requirements.
Voltage / Current Range: While this unit is 15V / 1000A, we engineer custom solutions from 1V to 1000V DC and 1A to 100,000A DC.
Input Power: All common industrial inputs are available (Single phase 220V, 3-phase 208V, 380V, 415V, 480V, 600V AC).
Integrated Process Modules:
Process Timer: Standard batch timer with end-of-cycle alarm.
Multi-Stage Profile Control: Program up to 16 steps of voltage, current, and ramp time for complex surface finishing cycles (e.g., high current for deburring followed by low current for passivation).
Ampere-Minute Integrator: Account for total charge passed to achieve consistent material removal regardless of part surface area variation.
Automatic Reverse Polarity (ARP): For de-smutting and cleaning cycles without manual intervention, controlled via the digital timer.
Control Interfaces:
Standard: RS485 Modbus RTU for PLC or SCADA integration.
Optional: Ethernet/IP, Profinet, or DeviceNet.
Analog: 0-10V / 4-20mA remote control signals for external potentiometer or automation controller.
Pulse Function: Adjustable frequency from 1 Hz to 3000 Hz with independent forward/reverse current control. This is a critical feature for achieving a fine-grain surface finish on high-nickel alloys and for reducing pitting in high-aspect-ratio features.