Rare Earth Smelting – 24V 4000A Industrial High Frequency IGBT Rectifier

This 24V 4000A system is engineered as a high-efficiency DC power supply for molten salt electrolysis in rare earth smelting. Rather than relying on bulky, inefficient SCR (silicon-controlled rectifier) technology, this unit uses advanced IGBT (Insulated Gate Bipolar Transistor) modules operating at a high switching frequency. This design delivers a significantly purer DC output, directly improving the current efficiency and stability of the reaction bath. As a dedicated industrial high frequency rectifier factory, we ensure this unit is built for 24/7 heavy-load cycles, providing the precise current density required for consistent metal extraction.
Part 1: Key Features & Engineering Highlights
– Advanced IGBT Topology: The core utilizes high-power IGBT modules with a phase-shifted full-bridge circuit topology. This reduces switching losses and ensures a clean, ripple-free DC output (less than 3% ripple), which is critical for preventing dendrite growth and ensuring product purity.
– High Conversion Efficiency: Operating at over 90% efficiency at rated load, this unit drastically reduces energy consumption compared to traditional transformers. This leads to a lower total cost of ownership and less waste heat generation in your facility.
– Precise Constant Current/Voltage (CC/CV) Control: Features dual closed-loop PID control for automatic crossover between constant current (primary) and constant voltage modes. This ensures uniform current distribution across the electrode surface during the entire electrolysis cycle.
– Heavy-Duty Industrial Construction: Built with a robust 2.0mm steel cabinet with a corrosion-resistant powder coating. All internal components are mounted on custom bus bars for high current transfer and minimal electrical interference. The transformer is a high-frequency ferrite core design, significantly reducing weight and footprint.
– Digital Microprocessor Control: Centralized control via a 7-inch HMI touchscreen or local membrane keypad, providing real-time monitoring of output voltage, current, temperature, and fault status.
Part 2: Technical Specifications Table
| Parameter | Specification |
| :— | :— |
| Input Voltage & Frequency | 3-Phase, AC 380V ± 15%, 50/60Hz |
| Output Voltage Range | DC 0–24V (Continuously Adjustable) |
| Output Current Range | DC 0–4000A (Continuously Adjustable) |
| Rated Output Power | 96 kW |
| Output Ripple | 90% (at rated load) |
| Control Mode | Constant Current (CC / A) / Constant Voltage (CV / V) |
| Set Point Accuracy | ± 0.5% of full scale |
| Display | 7-inch TFT Touchscreen & Analog Meters |
| Cooling Method | Forced Air Cooling (Dual redundant fans) |
| Protection Level | IP21 (Indoor use) |
| Working Duty | Continuous (24/7 rated) |
| Communication Interface | RS485 Modbus RTU, Ethernet, 4-20mA Analog Isolated |
Part 3: Advanced Built-in Protection Systems
Safety is paramount for continuous smelting operations. Your industrial high frequency rectifier factory has integrated an extensive protection matrix to safeguard both the equipment and the process. This includes:
– Overcurrent & Short Circuit Protection: Instantaneous shutdown (under 100 microseconds) via IGBT desaturation monitoring.
– Phase Loss & Input Over/Under Voltage Protection: Prevents the unit from operating in unstable grid conditions.
– Over Temperature Protection: Monitors the heatsink temperature of the IGBT modules and the ambient internal temperature. Automatic derating or shutdown at critical levels.
– DC Arc Detection: Advanced monitoring for abnormal DC flashover conditions.
– Earth Fault Protection: Ground leakage detection for operator and equipment safety.
Part 4: Target Industrial Applications
This rectifier is purpose-built for high-intensity electrochemical operations. It excels specifically in:
– Rare Earth Smelting (Primary Application): Molten salt electrolysis for Neodymium, Praseodymium, Lanthanum, Cerium, and other rare earth metals.
– Lithium Manganese Smelting: High-current reduction processes for battery-grade metals.
– Antimony & Indium Extraction: Precise electrolytic refining and extraction of non-ferrous metals.
– Heavy-Duty DC Electrolysis: Applications requiring massive, stable current output over long durations.
Part 5: Customization and Tailored Engineering Services
We understand that no two smelters are identical. As a professional IGBT rectifier manufacturer, we offer extensive customization. Your custom current voltage rectifier can be configured with these optional engineered modules to match your exact process flow:
– Full Bipolar Power Range: Customizable output from 1V to 1000V and 1A to 100,000A. Input is AC (single/three phase), Output is pure DC.
– Process Timer & Multi-Stage Profile Control: Program up to 200 segments of varying current/voltage ramps and dwell times for precise material processing.
– Ampere-Minute (Ah) Integrator: A high-accuracy digital coulomb meter for precise plating/bath deposition control.
– Automatic Reverse Polarity: Programmable periodic current reversal (PCR) to break passivation layers on electrodes.
– Soft-Start Function: Gradual current ramp-up to prevent thermal shock to the bath or cracking of cold anodes.
– Pulse Functions (1 – 3000Hz): Add high-frequency or medium-frequency pulse output for enhanced mass transfer and improved grain structure.
– Remote Interfaces: Full integration with SCADA systems via RS485 Modbus RTU, Ethernet TCP/IP, or a direct 4-20mA analog signal.