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

SCR rectifier compare HF power supply

SCR rectifier compare HF power supply

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In the plating industry application, normally, there are two types of rectifier, which is:

1, Silicon controlled rectifier.
2, High frequency power supply.
While, what is the different between for the 2, sometimes it will cause us confused to choose them.
Here we use a table sheet to find out what exactly difference for them.

For easy to distinguish, we choose same power: 1000A 12V type rectifier. From this, I think you will know which one is what you want.

Comparison dataSCR RectifierHF power supply
TransformerLarge volume, heavy weight, 95kgSmall volume, light weight, 1kg
Control componentsSCRIGBT
Control methodPhase-shifted triggerPWM modulation
Working frequency50Hz20KHz
Ripple ratio<5%<2%
Voltage stabilization<5%<1%
Cooling methodOil/Air coolingAir cooling
Efficiency70%90%
Energy savingBadEasily save power 20-40%
Interference of power gridsBig, not easy to eliminateSmall, easy to eliminate
VolumeLarge volume: 900*1010*550mmSmall volume: 520*450*220
Weight180kg35kg

SCR rectifier compare HF power supply

Electroplating rectifier application in hard chrome plating

Electroplating rectifier application in hard chrome plating

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Electroplating rectifier application in hard chrome plating

Hard chrome plating high frequency electroplating rectifier absorb new technology, adopting international standards do 15KHz frequency pulse as signal source, and high-power IGBT soft-switching resonant converter technology, which are both in the international and domestic leading technology and unique applications constant current technology, constant current control accuracy up to 1 ‰, industry-leading, high-frequency, high-power, pulse width (big working rate) output, the cost performance is much better than similar products. Electroplating rectifier application in hard chrome metal plating case, and can be set two, three level strick hard chrome work method, so the chromium layer uniformity, strong adhesion, and can increase the thickness, showing additional advantage of energy-saving (90% efficiency), save time (takes only two-thirds of original electroplating rectifier, or even shorter), material-saving (raw material can save 30%), high efficiency (each working section can increase capacity of more than one-third).

Three phase electroplating rectifier features:

1. Electroplating rectifier machine adopts antiseptic treatment, sealed control components, each adapter sealed plastics, in order to protect them air corrosion from acid, alkali and salt, to ensure long-term stability working in corrosive environments.
2. Leading international technology, to achieve real high current, high frequency, high working rate pulse output.
3. PVC shell or spray metal shell, beautiful, will not corrode, straight cooling structure, installation and maintenance is very easy.
4. High efficiency (≥90%), a significant electricity saving (saving more than 30%) (6V1500A electroplating rectifier compare with silicon rectifier and SCR, can save electric charge more than $1600/year).
5. Variety control of constant voltage, constant current, steady current, constant power, etc.
6. Current, voltage, working time, frequency meter (optional), return meter (optional) and other all use high precision digital display, with sound and light alarm.
7. Soft start and stop function, with over current, over voltage, less voltage, over temperature, phase loss, less water, and short circuit protection function, high reliability.
8. Before delivery, our electroplating rectifier through rigorous testing and long time aging test, can be at full load day and night, uninterrupted running under high current, the failure rate is very low.
9. Adopting our electroplating rectifier, the plating layer can be more uniform, dense, good finish, enhanced the plated workpieces wear resistance.
10. Short working time, high efficiency, saving raw materials, reduce cost, will help you increase output efficiency multiplied.
11. Small size, light weight, easy delivery.

Phase electroplating rectifier main parameters:

1, Input voltage:220V/380V/440V
2, Frequency: 50Hz/60Hz
3, Efficiency:≥90%
4, Output voltage:0-15V continuously adjustable
5, Output current: 0-3000A continuously adjustable
6, Steady current accuracy:≤1 ‰
7, Steady voltage accuracy:≤1 ‰
8, Ripple wave:≤100mV
9, Insulation resistance:≥10MΩ
Oxidation pulse power supply

Oxidation pulse power supply

Oxidation pulse power supply:

If in oxidation treatment processes, you have high requirements: which is including film thickness, hardness, acid corrosion and film breakdown voltage requirements of high production requirements, please choose this special oxidation pulse power supply.

This is real oxidation pulse power supply, from the customers testing come to the conclusion: compare with general type rectifiers, our oxidation pulse power supply can we improve the quality of oxide film about 3 times, with features of output pulse, DC superimposed, pulse pole switching, DC and so on.

Oxidation pulse power supply

Constant current electrochemical reactivation in electroplating of gold

Constant current electrochemical reactivation in electroplating of gold:

In 1950 The United States Bureau of Mines, Zadra and other developed carbon-in-pulp process, which is put granular activated carbon directly into mixed slurry ore powder and cyanide pulp, to gernerate cyanide gold adsorb by activated carbon, through multiple reverse adsorption, concentration enrichment, then followed by desorption, to get gold, in this process, granular activated carbon can be repeated application of regeneration. 1973 US Homestake Mining Company built its first production CIP plant in extract gold. Then, South Africa has built a number of similar mines plant.

Gold electrochemical reactivation apparatus
Rectifier-Granular activated carbon electrochemical reactivation apparatus:

Rectifier is a apparatus to provide a consists of power supply of electrochemical reactivation in electroplating of gold from granular activated carbon. The electrical power was supplied by a potentiostatic controller and an accessory power supply. This unit was used as a transformer–rectifier to provide constant current.

Anodizing DC rectifier

Anodizing DC rectifier

Aluminum anodizing DC rectifier used in anodic oxidation of aluminum, this technical process is actually a process by mean of electrolytic aluminum surface to make aluminum profile or aluminum alloy profile forming alumina oxidization film. Our rectifiers also have imitation gold electroplating power supply, pulse electroplating rectifiers, high-frequency electro plating power supply, DC voltage stabilization power supply, battery charging power supply, DC motor test power supply, experimental measurement power supply, pulse superposition hard oxidation DC rectifier, special usage silicon AC to DC rectifier, electric furnace heating power supply, high power (electrolysis, oxidation) power supply and some matched power supply equipment etc..

Anodizing DC rectifier

Anodizing DC rectifier

Aluminum anodizing DC rectifier usage:

Aluminum anodizing DC rectifiers applied to aluminum profile (aluminum and aluminum alloy and so on) anodic oxidation treatment.

Aluminum anodizing DC rectifier features:

Has the advantages of small volume, light weight, high efficiency, high control precision, etc..;
Pulse width modulation power introduced international advanced technology, using IGBT power module of the international brand;
Complete protection function, has voltage stabilization & current stabilization working mode, and filtration, over-voltage, overheating, short circuit, phase missing protection functions and soft start.
The power supply adopts special design control system, internal structure of anti acid, anti alkali design, which greatly increase the service life of the product.

We can provide:

a. Digital timing system;
b. Ampere hour meter;
c. Standard interface;
d. Control signal interface.

Aluminum anodizing DC rectifier technical parameters:

Input voltage: three-phase four wire 380V, 415V, 50-60Hz;
DC output current: 100A-30000A can be optional;
Output DC voltage: 3V-1000V arbitrary choice;
Voltage stabilization accuracy: less than or equal to 1%;
Current stabilizing precision: less than or equal to 1%;
The output ripple current: 1%-2%;
Cooling method: forced air cooling or water cooling;
The cooling water quality: ordinary tap water, deionized water (recommended); PH value: 7-8, Water pressure: 0.1-0.25MP, Temperature: 3 degrees -33 degrees;
Load operation: full load run for 24 hours, more than 1000 meters above sea level, reducing the use of capacity;
Working environment: the environment temperature is 10 degrees below zero to 40 degrees; at room temperature (15-25 degrees) of air relative humidity should be less than 90%.

If need better hardness and quality, pulse power supply is good for your choice.

The packing of rectifier and services:

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

100A Rectifier

Plating rectifier 100A

Plating rectifier has important position in plating machine area:

Electroplating is an electrolytic process. Needless to say, the performance of its power supply, type, characteristics and other factors will have a significant impact on electro plating process. Especially today with the rapid development of modern electroplating technology, plating rectifier has more important position. Therefore, understanding the impact of electro plating rectifier to plating process is very necessary.

High frequency switching plating rectifier, also called as HF switching power supply:

Which is a new type electro plating machine plating rectifier – high frequency switching power supplies. It combines advantages of silicon rectifier waveform smoothness and silicon controlled rectifiers voltage easy adjustment, while has highest current efficiency (up to 90%), the most smallest volume, and needless to say, it is the most promising plating rectifier. Manufacturing technology has solved the power problem, thousands of amperes power switching plating rectifiers have entered a practical stage of application.

Plating rectifier conversion:

Make the AC grid by EMI anti electromagnetic interference filter, direct rectification, filtering wave, by mean of inverter convert DC voltage into tens or hundreds of KHz square wave frequency, and then by high frequency transformer isolation, reduction voltage, then by high-frequency filter output DC voltage. After sampling, comparison, amplification and control, the drive circuit and power converter controls duty cycle of IGBT, obtained a stable output voltage (or output current).
High-frequency switching plating rectifier control tube in work state, the power consumption loss is small, that efficiency can reach 75% to 90%, small size, light weight, and accuracy and ripple factor are all better than silicon rectifier, in the full output range can achieve production required accuracy. Plating rectifier has self protection ability, can start and stop under loading at will. It’s very easy to connect with the computer, to bright great convenient to automatic production, so has been widely used in PCB electroplating industry.

100A Rectifier

100A Rectifier

Electroplating high-frequency switching plating rectifier main conversion structure has: forward converter, half bridge, full-bridge, etc., have pulse-width modulation (PWM) “hard switch” circuitry,also have popular phase-shift control “soft switch ” power circuit.
Pulse width modulation (PWM) HF switching plating power supply, its operating frequency mostly below 50 KHz, with a voltage or current feedback control.It change the drive voltage pulse width to alter output current by interrupting power flow and adjust the duty cycle method, make the device working in the “hard switching” state, ie forcing conduction (voltage is not zero) or forced shutdown (current is not zero), making the switching power transistor both exist high pressure and large current cross when switch on and off, therefor switching loss less, peak interference strong.

High press peak arose by transformer leakage inductance and high current change rate, not only easy to damage the power tube, also produce significant electromagnetic radiation, that reducing the reliability and power efficiency.Switching power supply plating rectifier frequency has reached audio frequency, through filtering wave to realize low ripple wave output is more easy. And further more, steady current and voltage functions easier to achieve.

Plating rectifier specification and parameter:

Plating rectifier Input voltage Single phase 220V 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 0-100A (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

Plating rectifier Packing details:

TypeLength (mm)Width (mm)Height (mm)Weight (kg)
50A/12V3503501508
100A/12V42035015010.5
200A/12V45045020018
300A/12V50050022021
500A/12V50050020025
1000A/12V55050028038
1500A/12V60050075060
2000A/12V60050085088
3000A/12V650700850140
4000A/12V6507001100190
5000A/12V7007001450230
6000A/12V7007001700300
200A Power supply

Power supply 200A

Power supply rectification technology:

Plating power supply frequency is a direct current equipment of changing industry frequency alternating voltage into different voltage, frequency and waveform. In the thyristor rectifier main application of “rectification” technology, while in the high frequency switching mode power supply applying both “rectification” technology and “inverter” technology.

Plating Power supply mainly consisted of main circuit and control circuit.

Power supply definition:

Changing different voltage, frequency and waveform.
Power supply components: Main circuit and control circuit.
Power Frequency: 50Hz/60Hz.
Application: zinc plating, anodizing, chrome plating, copper plating, and other nonferrous metals plating.
Alternatives to silicon-controlled rectifier and oil dip power supply.

200A Power supply

200A Power supply

Power supply main circuit includes main transformer, power rectifier components and some other testing, protection devices. Power supply main transformer function is to reducing AC current/voltage to the plating technical process required voltage value. Thyristor rectifier uses frequency (50Hz/60Hz) transformer, while high-frequency switching power supplies using high frequency (10 ~ 50kHz) transformer. Detection devices include voltage meter, current transformers. Protection device is mainly used for power rectification components over-current protection. The control circuit includes a thyristor or IGBT, trigger control circuit, power soft-start circuit, over-current, over-voltage protection circuit, power phase protection circuit.

Power supply specification and parameter:

Power supply Input voltage Single phase 220V 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 0-200A (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

Power supply Packing details:

TypeLength (mm)Width (mm)Height (mm)Weight (kg)
50A/12V3503501508
100A/12V42035015010.5
200A/12V45045020018
300A/12V50050022021
500A/12V50050020025
1000A/12V55050028038
1500A/12V60050075060
2000A/12V60050085088
3000A/12V650700850140
4000A/12V6507001100190
5000A/12V7007001450230
6000A/12V7007001700300

300A DC power supply

DC power supply 300A

DC power supply

DC power supply

How to choose dc power supply?

To select dc power supply has three requirements:
1, Meet the specifications required by plating process, including dc power supply power, waveform index, adjustable current and voltage range, etc.;
2, DC power supply itself reliability power supply, which mainly refers to structure reasonable, security and line features, cooling methods;
3, DC power supply cost performance.

Determine what kind of DC power supply suitable for you:

Determining plating type and and what kind of dc power supply the plating tanks shall use is the implementation and the first important work in electroplating production. There are 2 methods to determine suitable dc power supply in the actual plating production:
One: according to plating liquid solution to determine volume current density;
Two: calculated according to the plating area to get plating current density per unit.

The so-called volume current density, it is based per liter of plating solution allowed to pass maximum current to adjust entire plating tank current intensity, to determine the maximum power supply output and the conventional output.

Example for choosing DC power supply:

Copper is generally 0.2 ~ 0.3A/L;
Nickel is 0.1 ~ 2.5A/L;
Bright nickel plating is 0.3 ~ 0.35A/L;
Acid zinc is A/L;
Alkaline zinc up to 1.2 A/L;
Chrome is A/L.
Bright nickel plating as case shows, 600L bath maximum process current up to 0.3A/L × 600L = 180A, so choose 200A DC power supply is just fine.

If according to plating area volume also can calculate the max. current.
We take chrome plating as case: if it is 600L plating bath, at 60 ℃, maximum current density of 100A/dm2, the plating tank at full load setting as 10dm2, then the power required maximum output current of 100A/dm2 × 10dm2 = 1000A, that is, 1000A DC power supply, 18V rectifier power supply.

After determining power of DC power supply. Also need consider plating technical treatment process requirements and plating site condition to select waveform, cooling method, volume size, and corrosion resistance, etc., including cost factors.

DC power supply Specification and parameter:

DC power supply Input voltage Single phase 220V 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 0-300A (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

DC power supply Packing details:

TypeLength (mm)Width (mm)Height (mm)Weight (kg)
50A/12V3503501508
100A/12V42035015010.5
200A/12V45045020018
300A/12V50050022021
500A/12V50050020025
1000A/12V55050028038
1500A/12V60050075060
2000A/12V60050085088
3000A/12V650700850140
4000A/12V6507001100190
5000A/12V7007001450230
6000A/12V7007001700300

6000A switching mode power supply

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Rectifier 6000A

Parameters:

Input voltage: Three phase AC380V±15% or single phase AC220V±15% 50Hz 60Hz;
Output current: 0-20000A  optional 100%continuously adjustable designed by your requirements;
Output voltage: 0-400V optional 100%continuously adjustable designed by your requirements;
Output range: Output voltage:0~rated value. (no limited);
Output current: 0~rated value.( no limited);
Efficiency: More than 90%;
Control mode: PWM Pulse control;
Cool mode: Forced by air cooling;
Voltage stability: Within1%;
Current stability: Within1%;
Control accuracy: Rated value within±1%;
Operation mode: Constant voltage, Constant current, output adjustment, ON/OFF, soft start and so on.Designed by your requirements;
Work load: 100% full load continuous running, If more than 1,000 meters above sea level, it will be reduced load operation;
Working condition: Indoors better with ambient Temperature range from -10 °C to 40 °C is good for device ,Less than 90% humidity(when ambient temperature is 20°C±5°C);
Display: Digital meters or touch screen, Ampere hour meter, timer alarm ,etc, Designed by your requirements;
Signal interface: PLC 4-20mA, 0~5V, 0~10V, RS485 or RS232 Designed by your requirements;
Complete functions: The self-protection function of over current, short circuit,overheating, phase lack, etc. Easy to maintain;
Warranty: At least One year from delivery against manufacturing defects, material defects and workmanship fails. Warranty does not cover mishandling, misuse and any operation outside working conditions;
Reasonable design, more safe and durable, separate from the harsh environment.

750A AC to DC rectifier

750A AC to DC rectifier

AC to DC rectifier

AC to DC rectifier

 AC to DC rectifier features:

  • Our AC to DC rectifier uses famous brand components and international advanced full bridge inverter technology of precision machining, so that the performance of the whole AC to DC rectifier is stable,quality is more reliable.
  • Whole AC to DC rectifier has the function of over voltage, over current, over temperature, short circuit, equal and automatic protection alarm function and soft start function. And can be equipped with time control and computer interface.
  • DC output waveform is high frequency square waveform, ripple factor less than 1%, can increase plating, refuse passivation, enhance the gloss of the plating coating surface and the core of the dark corner of plating coating. And can reduce the loss of raw materials, to achieve a variety of special requirements of electroplating industry.

AC to DC rectifier cooling method:

  • High frequency switching power supply AC to DC rectifier adopts air cooling/water cooling design, easy to install. With remote control device, simple operation. Can switch off the machine when loading, reduce cumbersome procedures of adjustment.

AC to DC rectifier advantage of small size and energy saving:

  • Small size, light weight, the whole AC to DC rectifier machine use a full range of anti-corrosion technology, enhanced the product’s anti corrosion ability, extend the service life.
  • High efficiency, energy saving, work efficiency can reach more than 90%, any voltage current ratio is always linear matching. Eliminating the need for traditional rectifiers regulator and the main transformer loss, energy saving in more than 35%, greatly reducing the electro plating cost, which is the most sensible choice for surface treatment plating machine industry.

AC to DC rectifier Specification and parameter:

AC to DC rectifier Input voltage Single phase 220V AC, 3 phase 380V/415V/440V 50-60Hz, suggest to use 3 phase
Output voltage 6V/12V/15V/18V/24V/36V/48V optional or according to customers’ request
Output current 0-750A (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

AC to DC rectifier Packing details:

TypeLength (mm)Width (mm)Height (mm)Weight (kg)
50A/12V3503501508
100A/12V42035015010.5
200A/12V45045020018
300A/12V50050022021
500A/12V50050020025
1000A/12V55050028038
1500A/12V60050075060
2000A/12V60050085088
3000A/12V650700850140
4000A/12V6507001100190
5000A/12V7007001450230
6000A/12V7007001700300