Electropolishing – 15V 1000A High-Frequency IGBT Rectifier by GAOHUI

Executive Summary
This is not a general-purpose plating rectifier. The GAOHUI GKD15-1000CVC is a dedicated heavy-duty DC power supply engineered exclusively for the demanding physics of electropolishing and electrochemical surface finishing. By delivering ultra-low ripple, precision low-voltage DC at 15V and 1000A, this unit fluidizes the anodic layer on stainless steel and aluminum, enabling mirror finish polishing and consistent electrochemical deburring without etch lines. Built in our industrial high frequency rectifier factory, the variable switching IGBT technology offers a heavy-duty DC power supply price that matches shop-floor productivity targets without sacrificing process repeatability.
Part 1 Key Features & Engineering Highlights
Ultra-Low Ripple Precision: Output ripple is suppressed to below 1% RMS, critical for eliminating surface pitting during electropolishing and achieving uniform gloss on medical implants and architectural fittings.
Full Digital IGBT Control: Proprietary high-frequency switching transistors replace heavy SCR transformers, providing immediate voltage/current response with no mechanical drift. This allows stable operation from 1V all the way to 15V at full 1000A load, even under fluctuating grid conditions.
Multi-Mode Constant Current / Constant Voltage: Lock into CC for controlled anodic dissolution during electropolishing, or switch to CV when deburring delicate edges of aerospace components. The digital PI controller holds set points within ±0.5%.
Remote & Local Control Flexibility: Standard RS485 Modbus RTU and Ethernet ports allow full integration into your PLC or SCADA system. A tactile front panel with full LCD display provides manual override, making unit commissioning simple for new line setups.
Part 2 Technical Specifications Table

Part 3 Advanced Built-in Protection Systems
Industrial hazards demand a rectifier that does not fail. The GKD15-1000CVC integrates a five-layer protection matrix: soft-start (eliminates inrush on 400V input), thermal cut-off with graded fan speed, instantaneous overcurrent shutdown under 50 microseconds, and reverse polarity lockout to prevent electrolyte backflow damage to the IGBT bank. An active overvoltage clamp safeguards your workpieces against anode-contact arcs during bath entry.
Part 4 Target Industrial Applications
Gold-standard electropolishing of 304/316L stainless steel equipment, electrochemical deburring of internal gears and pump housings, and mirror finish polishing on large-diameter metal vessels. This rectifier is equally suited for precision passivation lines in semiconductor wet benches and high-throughput tubular finishing lines for food-grade sanitary piping.
Part 5 Customization and Tailored Engineering Services
GAOHUI offers a certified IGBT rectifier manufacturer partnership for industries requiring unique dimensional or process features. We customize the output voltage from 1V to 1000V and current from 1A to 100,000A, all within the same modular IGBT platform. Our engineering team can integrate a Process Timer for captive bath cycles, a Multi-Stage Profile Control for automatic voltage ramping, an Ampere-Minute Integrator for precise coating thickness control (or, in electropolishing, metal removal volume), and Automatic Reverse Polarity for pulsed bipolar etching. A Soft-Start ramp module is standard on all units. For datalogging and remote access, we interface via RS485 Modbus RTU, Ethernet TCP/IP, or isolated 4-20mA analog loop. Pulse Functions are configurable from 1Hz up to 3,000Hz adjustable duty cycle, essential for deburring sharp internal corners. Contact GAOHUI for a custom current voltage rectifier configured to your exact flow bath geometry.