Fengfan High Frequency Switching Power For EIectropIating Oxidation Electrolysis

Product Overview

The Fengfan high-frequency switching power supply is an industrial direct-current source built for electroplating, oxidation, electrolysis, anodized aluminum finishing and any other process that runs on a stable DC load. Inside the cabinet, high-frequency switching, IGBT power conversion and a high-permeability nanocrystalline transformer core do the work that an older tap-changing rectifier does with much heavier losses.

Set it to hold a constant voltage with a current limit, or a constant current with a voltage limit. Stabilized accuracy is 1% either way, so the figure on the display is the figure at the busbar. Two options make a recipe easier to repeat: electric-quantity control, which ends a cycle at a set charge, and timing control, which ends it at a set time.

The unit is a freestanding floor cabinet with a front door, digital display screens, a rotary control knob and round push buttons on the front panel, and vented grey side panels that let cooling air move through the enclosure. It is meant to stand beside the tank and be run by line staff during the process of electroplating, anodizing or electrolysis, not kept in a laboratory.

Product Specifications

Stable Output for Electroplating

Coating thickness follows current density multiplied by time. If the current wanders while a jig is in the tank, the part at the top of the rack and the part at the bottom finish at different thicknesses, and the whole load is judged by its thinnest point.

This unit is built to hold that current. In constant-current mode it keeps the set amperes as the load changes — more parts on the jig, a different contact resistance on a barrel, a bath warming up through the shift — so the deposition rate stays where the recipe put it. In constant-voltage mode it holds the voltage and caps the current, so a fault cannot pull the whole line.

The adjustable DC output covers barrel lines and heavy industrial electroplating duty from the same platform. That matters where a shop runs zinc, copper and nickel on different tanks, or an aluminum anodizing process alongside plating, and would rather keep one rectifier family on the floor than a different model for every tank. On heavy work, the top of the current range carries the large surface areas that chrome and nickel tanks put into the bath at once.

Control Modes and Interfaces

• Manual control from the panel. The operator sets current or voltage on the front panel and the unit holds it. This suits job shops doing nickel plating where the recipe changes several times a day and nobody wants to reprogram a controller.
• Automatic control from the line. A standard 4–20 mA, 0–5 V or 0–10 V signal lets a PLC or line controller drive the setpoint, so the rectifier follows the same recipe as everything else on the industrial metal plating line.
• RS-485 digital control, optional. Where the line is recipe-driven, the digital link lets the controller read and write setpoints instead of trimming an analogue signal.
• Selectable ripple factor, 1%–5%. A tighter ripple suits work where a smooth, dense deposit matters; the wider setting is enough for processes that do not need it. The choice is made when the unit is specified.
• Two regulation modes. Constant voltage with current limiting, or constant current with voltage limiting, chosen to match the way the bath behaves during the cycle.
• Optional electric-quantity and timing control. Rather than an operator watching the clock, the unit ends the cycle at a set charge or a set time, so the next shift runs the same job the same way.

Protection and Cooling

Three protections are built in: overcurrent, short circuit and overtemperature. Between them they cover the three ways a plating line gets into trouble — a jig that touches the busbar, a part that falls across the anodes, and a cabinet that cannot get rid of its own heat on a hot afternoon.

Cooling is by air, with automatic cooling control that raises and lowers fan effort with the load instead of running flat out all shift. That keeps the inside of the cabinet within its working range during a long metal plating process and draws less dusty plating-room air through the enclosure when the unit is idling.

The casing is corrosion-resistant, which is the difference between a rectifier that lasts in a plating room and one that corrodes from the inside out; humidity and acid fumes are the normal environment here for plating and anodized aluminum work, not an exception.

The internal layout is modular, so a failed board or module can be replaced instead of scrapping the cabinet, and access is through the front door. On a line that runs continuously, that is what keeps a repair to an afternoon.

Energy Efficiency

• High-frequency switching instead of a tap changer. IGBT power conversion at high frequency removes losses that a conventional rectifier turns into heat, with a typical energy saving of 20%–30% against traditional rectifier technology.
• A high power factor. Most of the current the unit draws is current the process actually uses, so the supply sees a cleaner load than an old rectifier presents.
• Losses show up on the bill, not on the nameplate. On an industrial metal plating line running two or three shifts, the rectifier is one of the few loads that is energised all the time, so a few percent of conversion loss is a few percent of the electricity bill every month.
• Less heat to remove. Lower conversion loss means the cooling system has less work to do and the electronics run cooler, which helps service life as well as consumption.
• It applies beyond the process of electroplating. Oxidation, electrolysis and anodizing also run on DC for long hours, and the saving scales with the hours the unit is switched on.

Output Precision and Coating Quality

Precision on a rectifier is not a laboratory nicety. Stabilized accuracy of 1% is what keeps the setpoint where the recipe put it, so the deposit at a high-current-density edge does not burn while the low-current-density area stays dull and under thickness. In a plating process that is checked against a thickness specification, that difference is the difference between a passing load and a rework load.

The unit has digital displays and programmable settings, so a recipe is entered once and repeated. Instead of an operator adjusting by eye at the start of every shift, the same numbers come back on the panel — which is how two shifts produce comparable coating.

Fine regulation also helps with the parts that are hardest to plate: complex geometry, deep recesses and mixed loads on one jig, where the current has to be right rather than merely close. Every load that avoids a strip-and-replate saves the chemicals, the energy and the tank time a second pass would cost.

Reliability and Safety

• Core and layout. A high-permeability nanocrystalline transformer core and a compact internal layout keep output stable when the unit is worked hard, not only at nominal load.
• Anti-interference circuitry. Plating rooms are electrically noisy — busbars, pumps, contactors. The control circuitry is built to hold its setpoint while neighbouring equipment switches.
• Overload safeguard. Alongside overcurrent, short-circuit and overtemperature protection, the unit carries an overload safeguard for the equipment and for the people working around it.
• Tested before dispatch. Every unit is checked against its specification before it leaves us. If your project file needs the record, ask for it with the order.
• Spares and advice. Because the layout is modular, spare parts are practical to hold; ask for the recommended spares list for the rating you order, and for technical advice whenever the duty changes.

Applications

The same cabinet turns up in very different shops. A jobbing plater running zinc on steel jigs, a jewellery finisher working in small loads where colour has to match, an automotive tier supplier plating chrome or nickel on large parts, a workshop that anodizes extrusions and a plant that runs electrolysis inside its own process all need one thing: a DC supply that holds its setpoint for hours and can be told what to do by whoever is running the line.

What changes between them is the size of the load and the way the setpoint is driven, not the principle. That is why one range covers the process of electroplating, anodizing, oxidation and electrolysis instead of a separate product for each: current and voltage are adjustable, the interface can be a panel, an analogue signal or a digital link, and the protections are the same across the range.

Shops with mixed work are the clearest case for it — steel parts in the morning, brass after lunch, a batch of anodized parts at the end of the week — because one unit can be reset for each job rather than dedicated to one.

Large-Scale Electroplating Facilities

• Automotive and aerospace plating machines. High-current output for chrome, nickel and copper lines where the surface area in the bath is large and the current has to arrive without sagging.
• Continuous production. A stable DC output is what keeps coating thickness uniform across a long run of parts, which is the measure the end customer's inspection will apply.
• One platform, several lines. The adjustable current and voltage range lets the same unit type serve different tanks and recipes, so a plant does not carry a separate model per bath.
• High-current duty. The upper part of the output range is where large industrial electroplating tanks sit; order with headroom if a tank may be enlarged later.
• Line control. Automatic control from the plant PLC, over an analogue signal or the optional digital link, keeps the rectifier inside the line's own recipe rather than beside it.
• Nickel plating lines gain most from steady current, because nickel throws slowly and a drifting setpoint shows up first at the far end of the rack.

Anodizing Workshops

Anodizing is a DC process with a difference: the oxide film grows as the cycle runs, so the load changes underneath the rectifier and the voltage needed to hold a given current climbs. A supply that simply holds a voltage will watch the current fall away. One that regulates properly holds the current and lets the voltage follow.

Adjustable parameters let a workshop run different alloys and different requirements in the same tank — a decorative finish on one job, a heavier coating on the next — without changing the power supply. The unit can be set up for manual control where the operator watches every job, or for automatic control over the analogue interfaces or the optional RS-485 link where the same job comes back each week and the settings should be identical every time.

For anyone running anodized aluminum parts alongside plating, the practical advantage is that the same cabinet type, the same spares and the same operating logic cover both, and an operator who can run one can run the other.

Precision Electronics and Semiconductors

• Circuit boards and connectors. The unit supports micro-electroplating and electroless nickel work where the deposit is measured in microns and a small drift in current is a large drift in the result.
• Tight setpoint control. Regulation accuracy of 1% is what keeps a micron-level deposit repeatable from panel to panel, and the digital display lets the operator confirm the setpoint before the load goes in.
• Output without spikes. Current that arrives without spikes or sag keeps fine features from plating over and keeps the deposit even across a panel.
• Repeatability across a shift. Programmable settings mean the same job run later in the week starts from the same numbers, which is what a metal plating process under statistical control depends on.
• Protection for expensive loads. A short on a fine-feature panel is costly; the built-in protections limit the damage and stop it travelling back up the line.

Oxidation, Electrolysis and Other DC Loads

Plating and anodizing are the obvious jobs, but the same unit is specified for oxidation, electrolysis and other processes that need a direct-current load held steady. These duties often run unattended for long periods, which changes what matters: the protections have to be dependable, the cooling has to cope with a cabinet that is never switched off, and the setpoint has to stay where it was set without an operator checking it.

Because the output is adjustable and the interface can be a front panel, an analogue signal or a digital link, the unit can be built into an existing power configuration rather than requiring the plant to be redesigned around it. A resistive load, a bath whose resistance changes through the cycle and a cell that must be current-limited are all handled by the same regulation modes.

This is also the reason the platform is offered with the same protections across every rating: outside a plating shop there is often nobody standing next to the cabinet when something goes wrong.

Output Range and Cabinet

• The low end of the current range. Small jigs, barrel work, sample plating and pilot lines, where a compact rating gives the same control as a full-size unit.
• The middle of the range. General jobbing work: racks of small parts, mixed loads, tanks that are run at different currents through the week.
• The top of the range. Large tanks and continuous lines with a big surface area in the bath at once, where current has to be available without the voltage collapsing.
• The voltage band. 6–36 V DC covers most plating and anodizing baths. An aluminum anodizing process that needs more, or a cell with unusual characteristics, should be raised with us so the rating is confirmed rather than assumed.
• Cabinet and siting. A freestanding floor cabinet with front-door access, sized to stand beside the tank. Leave room at the vented side panels so air can move.
• Growing within the family. A shop that outgrows a rating can move up inside the same design instead of relearning a different controller.

Equipment That Works With It

• A Hull cell for bath checks. Before a setpoint is blamed for a poor deposit, a 267 ml Hull cell panel shows what the bath is doing across the current-density range — the quickest way to separate a power problem from a chemistry problem in a metal plating process.
• A filter matched to the tank. Circulation and filtration keep the bath clean, and a clean bath is what lets stable output show up as a uniform coating rather than as variation from contamination.
• Brighteners and levelers from the same source. Output precision only pays off if the bath is in balance; supplying both from one place means the two are specified together rather than corrected against each other.
• Busbars, cabling and signal wiring. Sized by your own electrician for the current you order; the DC connections and the control signal are the two interfaces to agree before the unit is installed.
• Spares on the shelf. A rectifier is a single point of failure on a line, so most plants hold the recommended spares for their rating instead of waiting on a shipment.

Ordering and Technical Enquiry

1. Send us the duty: the DC current and voltage you need, the plating process or DC application it serves, the control interface you prefer, the space and cooling available, and the destination.
2. We check the configuration against the output range and confirm the rating, the price and the delivery schedule with you.
3. Minimum order quantity is confirmed with our sales team for each order, since it varies by chemical.
4. Payment is 100% T/T in advance.
5. Production lead time is 2 weeks.
6. Packing follows our standard export formats: 10 kg/box; 25 kg or 50 kg/bag; 20 kg/25 kg/30 kg/200 kg/drum; 1000 kg/IBC drum.
7. Shipping is arranged per the terms agreed in the current contract.
8. After delivery an inspection certificate is issued stating the batch number and the warranty period.

Technical Support & Model Matching

Choosing the right match is where most sourcing decisions stall. As a trading supplier, we keep one point of contact from first enquiry to after-sales: tell us what you are making and the conditions you work under, and we shortlist the closest matches from our supplier network, compare specifications and arrange samples before you commit to a bulk order. If something does not behave as expected, we work with the supplying partner on the cause and a practical fix, and stay with the case until it is settled. Email, WeChat or WhatsApp enquiries get a reply within 24 hours.

FAQ