DC power
Silicon, Industrial & AC-to-DC Rectifiers
Controlled DC supplies for process duties, typically 50–5,000 A.
- DC output
- Typically 6–220 V DC
- Control
- Constant current or constant voltage
- Cooling
- Air or oil cooled
Have a different requirement? Share your application and preferred configuration.
Made for the application.
An industrial rectifier combines a transformer with a silicon diode or thyristor bridge to deliver DC at the voltage and current a process needs. Invitrona manufactures air-cooled and oil-cooled rectifiers, typically from 50 to 5,000 A and 6 to 220 V DC, with constant-current or constant-voltage control. The output, ripple, control interfaces and cooling are agreed against the process duty rather than taken from a standard table.
Typical application contexts
- Electroplating and anodising
- Electrolysis and electro-refining
- Battery charging
- DC motor and magnet supplies
- Electrophoretic coating
- Heating and DC test supplies
Constant current or voltage
The operator selects CC or CV control, so one rectifier can follow a plating current density or hold a bath voltage.
Step-free adjustment
Output is adjusted smoothly from near zero to full rating, either by on-load voltage control or by thyristor phase control.
Cooling matched to duty
Air cooling suits moderate duty in clean rooms; oil cooling suits continuous high-current duty in humid or corrosive process areas.
Process protection
Overload, short-circuit, over-temperature and phase-failure trips protect the rectifier and the work in the tank.
Panel and remote control
Local metering and controls come as standard; remote setpoint and ramping can be arranged for process integration.
Technical specifications
Typical values for the product class. The ratings, options and operating conditions for your equipment are confirmed during engineering review and stated in the quotation.
| Parameter | Value | Condition |
|---|---|---|
| Rating range | Typically 50–5,000 A DC | Higher currents by assessment |
| DC output voltage | Typically 6–220 V DC | Adjustable from near zero; higher voltages by assessment |
| Input supply | 415 V AC, three phase, 50 Hz | Single phase 230 V AC for small ratings |
| Conversion | Silicon diode bridge with on-load voltage control, or thyristor phase control | Six-pulse typical; twelve-pulse by assessment |
| Control mode | Constant current (CC) or constant voltage (CV) | Selected at the panel |
| Regulation accuracy | Typically ±1% of set value | Closed-loop control, within the rated input range |
| Cooling | Natural air, forced air or oil cooled | Selected against rating, duty and room conditions |
| Duty | Continuous (100%) duty or a stated process cycle | Overload capacity stated per unit |
| Output ripple | Typically 3–5% RMS without filtering | Lower with filtering or twelve-pulse arrangements |
| Efficiency | Typically 85–97% | Lower at low DC voltage and high current |
| Controls and metering | Local panel with DC voltmeter and ammeter, setpoint adjustment, start and stop | Remote setpoint and ramping by assessment |
| Protection | Overload, short-circuit, over-temperature and phase-failure trips | Settings stated for each unit |
| Ambient temperature | 0–45 °C | Air-cooled units; derating above 45 °C |
| Enclosure | Floor-standing sheet-steel cabinet, IP20 indoor | IP54 by assessment |
Documents & next steps
PDFSilicon, Industrial & AC-to-DC Rectifiers datasheetTypical specifications · Typically 50–5,000 A DCDrawings and documents for a specific order are agreed during engineering review.
For a useful first conversation
- Incoming supply and the required DC voltage and current
- Process type, load behaviour, duty cycle and operating conditions
- Control, protection, indication and interface requirements
- Cooling, enclosure, installation and maintenance constraints
Common questions
A little context before you enquire.
What information defines a rectifier?
The DC current and voltage at the operating point, the duty cycle, the process type and the incoming supply. Tank or load details help confirm the voltage needed at full current.
Constant current or constant voltage?
Plating and anodising are usually controlled on current density, so constant current is common. Constant voltage suits loads that need a steady DC level, such as some electrolysis or test duties.
Air cooled or oil cooled?
Air cooling suits moderate ratings in clean, dry rooms. Oil cooling suits higher currents, continuous duty and humid or corrosive process areas, where it also protects the windings and semiconductors.
How much ripple is acceptable?
It depends on the process. State any ripple limit in the enquiry; filtering or a twelve-pulse arrangement reduces ripple where the process needs it.
Where it is used
Application pathways that commonly start with this product class.
- IndustrialProduction facilities and process equipment
- OEM & product integrationPower designed into your equipment
