Shows all kinds of rectifier knowledge in rectifier industry, of course, the mostly usage is in plating machine area.

10000A HF rectifier

HF rectifier 10000A

HF rectifier

HF rectifier electroplating power supply usage:

HF rectifier large power switching mode power supply equipment for a range of industry: such as electrochemical plating surface, oxidation electrolysis, electrophoresis process, which is completely different works in the past type of SCR (silicon controlled rectifier).

HF rectifier electro plating principle:

It is by entering high voltage alternating current rectification – high pressure filtering – high voltage high frequency adjustment – low voltage and high frequency method to generate low voltage large current output. So it’s working principle determines has a higher converter efficiency and power factor than SCR (silicon controlled rectifier).

Use this type of HF rectifier can significantly reduce plating costs, improve product quality, compared with SCR power supply, electroplating energy consume savings of 15% –30%, that is bring considerable economic benefits. In addition, hf rectifier has features of small volume, light weight (air cooling is more less than water- cooled type), the installation and operation is very easy, which can save valuable production space for users.

HF rectifier advantages:

HF rectifier power source can be used for electro plating bath of gold, silver, cadmium, copper, zinc, tin and alloys of different materials. Compared with conventional rectifier has unique features: little volume, small size, light weight, high efficiency, high control accuracy. And enhance the dead parts current strength, so the plating workpiece to be plated uniformity, surface smooth, high gloss, etc. Using anti-salt spray acidification measures could increase hf rectifier life in harsh environments.

HF rectifier Specification and parameter:

HF rectifier Input voltage AC 3 phase 380V/415V/440V 50-60Hz
Output voltage 6V/12V/15V/18V/24V/36V/48V optional or according to customers’ request
Output current 0-10000A (Random optional)
Voltage stability ≤1%
Current stability ≤1%
Ripple factor 1%-2%
Efficiency ≥90%
 Stabilization mode Current stabilization/Voltage stabilization (Switchable easily)
Adjustment range Voltage/Current from 0-100% continuously adjustable within rated range
Cooling system Air cooling/Water cooling/Oil cooling
Control method Manual/PLC
Display contents Voltage meter/Current meter/Working/Over temp/Error, etc..
Protection method Input over voltage/Under voltage/Over current/Output short/Over heating self protection etc..
Operating temperature -20-50℃
Ambient temperature -30-65℃
Ambient humidity ≤90%
Working loading Full capacity operation, more than 1,000 meters above sea level, reduced load operation

HF rectifier Packing details:

TypeLength (mm)Width (mm)Height (mm)Weight (kg)
Pulse rectifiers silver plating

Pulse rectifiers silver plating

Pulse rectifiers silver plating:

Normal silver electroplating machine can’t obtain bright plating coating directly, in order to get brightness need chemical dip or barrel rolling treatment, but will cause silver electroplating coating loss, and difficult to recover 50% of loss, resulting in a greater waste. Bright silver plating can obtain bright plating coating directly, which simplifies operation and reduces waste, but electro plating coating antitarnishing worse, and conductivity deteriorates. Because silver in the air due to the sulfur can easily change color, additives, mostly as sulfur compounds, attached to plating coating inevitably promote its easier to change color, thereby seriously affecting the electrical plating and welding properties. Furthermore, the plating agent attached (in this case the agent can be regarded as impurities) make the silver plating layer impure, electrical properties then decrease. To make an inappropriate analogy, cold medicine to cure a cold, but comes with side effects (such as dizziness, drowsiness, etc.). Bright silver palting solution additives like cold medicine, the use of which may obtain directly bright silver plating layer, but side effects (such as anti-tarnish coating capacity, electrical conductivity variation, additive decomposition products difficult to handle, etc.).

Silver plating pulse rectifiers

Silver plating pulse rectifiers

About brightness silver plating side effect problem, the connector industry has been pointed out, the inner and outer conductor of the RF connector using bright silver electroplating, have a greater impact to products environmental resistance and electrical conductivity. In silver plating process also found bright silver plating pieces changing coler fast thant chemical dipping bright or barrel tumbling process type.
Of course, can adopt passivation, immersion silver anti-discoloration agent, or both, and use other measures of bright silver plating coating for anti-color processing, but this is only remedial measures, can not change its attached staff that its nature of sulfur compounds that can cause discoloration or affect other property.
Therefore, if there is high requirements of silver plating coating, generally not advocate the use of bright silver method, some military products (such as aircraft engine bearings protection frame) electroplating silver even prohibited the use of additives. But without additives will not get brightness coating,, while military performance only need the performance not consider brightness, but other products (such as professional electroplating factory processing products) could not deal with like military. Other products even asked for both performance and also the brightness (not using dip or barrel rolling processing) requirements, this is probably some difficulty, it’s something like ask for cold medicine both cure and can not have the side effects.
Some people think of pulse rectifiers silver plating, by using of pulse current in the ordinary silver plating solution to get brightness silver plating coating. Be the case, the pulse current is really an agent both brightness sliver plating and no side effects (good performance) medicine. At first, use a single pulse. Fewer parameters, just turn on, shutdown and peak current, the test soon finished. The result failed, only a single pulse silver plating layer is more detailed than the DC power supply, white, but still dull.
Then consider double pulse. Experts said that if the parameters properly, using double pulse most possible to give a bright nickel plating layer, which in terms of looking for silver-plated medicine is undoubtedly a good news, because if dark nickel-plating use double pulse can be bright, dark silver should be more able to get (anti-cyanide silver plating peel effect is more obvious). But double pulse plating power supply has many parameters, there are positive & negative turn on/off, shutdown and peak current and the positive/reverse working time, and the positive and negative parameters may differ from each other, if all together will be a huge number, so look for a dark silver get bright plating coating were not as simple as a single pulse. At present, dual pulse plating dark silver no matter experiment or production, used commonly parameters, but did not explore deeper, the result certainly will not get bright silver plating. Nevertheless, the double pulse current dark silver-plating get some inspiring results.
It is believed more than one person has done such a test, or have such experience: compare with DC rectifier, single pulse, double pulse dark silver plating machine, DC’s silver no brightness, while single pulse rectifier delicate, white, but still no brightness, and double pulse power supply has clearly brightness (substantially semi-bright) especially in plating parts high area compare to single pulse, and observed other area of workpiece under the sun will be a reflection of light. But this is a result of the use of commonly parameters, commonly parameters may not be the optimal parameters, if the case of optimum parameters, what will happen?

Barrel plating machine tumbling action functions:
① Increase the brightness electroplating layer coating;
② Allows brightness and color more uniform, hanging plating machine type has been got semi-bright in high zone of electro plating parts, why not barrel plating line type can’t obtain whole bright plating layer coating?

Of course, the outcome need facts speak, but adopts double pulse can achieve both performance and brightness at least have the following meanings:
① The use of pulse rectifiers silver plating, double pulse rectifiers with only a small part of plating chemical solution can obtain bright sliver plating coating, which can greatly reduce the amount of additives, to improve plating coating performance (due to attached less additive and pulse plating dense) and as well as ensure brightness, but also saves expensive additives (amplitude usually 50% to 80%);
② If use a common silver plating line, dark silver double pulse rectifiers roll has been got half-bright electroplating coating, then a slight dip bright light treatment shall be bright, by this way, isn’t silver material waste can be reduced?

Pulse rectifers silver plating

Pulse rectifers silver plating

Battery charger rectifier

Battery charger rectifier

Battery charger rectifier

Battery charger power supply

Battery charger power supply

Hard oxidation rectifier

Hard oxidation rectifier

Hard oxidation rectifier usage:

Dedicated to aluminum and AL alloy products surface hard oxidation treatment processes.

Hard oxidation rectifier

Hard oxidation rectifier

Hard oxidation rectifier features:

During oxidation processing, workpiece continuously generate gas, to hinder continuing of oxidation, which make the oxide film loose, porous, while pulse power is a rectifier of intermittent high-low current conversion working rectifier, that is conducive to precipitation of gas, easy film formation, the film thickness increases, the oxidation membrane more denser, hardness, thickness and color are all greatly improved. Currently oxidation power supply commonly used as DC power supply, the output do not have pulse, so the output generated relatively loose, and oxide film thickness, hardness, color all can’t reach the effect of pulse oxidation rectifiers;

Pulse superposition hard oxidation rectifier main technical characteristics:

A. Pulse rectifier effect is significant:

Pulse frequency is adjustable from 0.4-25Hz, our hard oxidation rectifier performance even over Italy CISART and TECNO rectifier, the max. frequency up to 3HZ, duty cycle is adjustable, step length 9.9ms;
Before and after the pulses are 90 vertical direction, which no ramp-up of the pulse, which is the most ideal for electrochemical process;
Base value pulses and superimposed level height adjustable random from zero.

B. Hard oxidation pulse rectifier performance is superior:

1-32 minutes adjustable soft-start time, and as the pulse soft-start, especially suitable for hard oxidation process;
1-256-minute running time can be adjusted (independent of the soft-start time), automatically shut down;
Variety of work options: pure pulse, pulse overlay, DC, etc;
In operation can be displayed at any pulse frequency, duty cycle, pulse-based high & peak all operating parameters, so you have complete control of which exactly state of the workpiece;
Under operation condition, the parameters can be freely modified, adjusted, ready storage, after power off, the saving time for 35 years, when the next starting will automatically run by the stored parameters;
According to aluminum, titanium anodization features, works method as current stabilization & voltage limiting work, to ensure a conductly sustainable and efficient oxidation, with the extension of electric solution power bath, the oxide film thickness increased, if the output voltage rises to the value set by security tree, the voltage stops rising, while crent gradually drop, which really protect the workpiece not ablation;
Complete safety and security measures, with variety of intelligent fault protection for over current, fault phase, phase sequence wrong, short circuit;
Transformer coil winding and bus all adopt high quality copper (Cu content 99.99%), good conductivity, higher current efficiency;
Transformer coil using two vacuum impregnation treatment process, with better insulation and corrosion resistance.

Pulse hard oxidation pulse rectifier parameters:

Input voltage: three-phase four-wire 380V, 415V, 50-60HZ;
Output Current: 200-10000A arbitrary choice;
Output voltage: 40V, 60V, 70V, 90V, 110V, 120V arbitrary choice;
Pulse frequency: 0.4-25HZ;
Duty Cycle: 10% -90%;
Output waveform: pulse, pulse superimposing, DC;
Running time: 1-256 minutes adjustable;
Work methond: Current stabilization voltage limiting;
Cooling: forced air;
Load operation: 24 hours at full load operation, if an altitude of 1000 meters reduce the capacity for using;
Working environment temperature 0 ℃ -40 ℃;
Relative humidity less than 90% (ambient temperature 20 ℃ ± 5 ℃).

The packing of pulse rectifier and services:

This section aluminum oxidation power supply using standard packaging (for details, please refer to our products packaging instructions).