AC Power Equipment Management Photovoltaic Capacitorsdc Link Capacitors AC Filter Capacitors

• Customization: Available
• Type: Polypropylene Capacitor
• Application: General Purpose, AC / Motor, Power, Air Conditioner, High Voltage, Automobile
• Model NO.: DC Link
• Packaging Type: Surface Mount
• Capacitance: 25~4500UF
• Structure: Fixed Capacitor
• Manufacturing Material: Polypropylene
• Transport Package: Carton
• Specification: DC Link
• Trademark: SMILER
• Origin: Guangdong, China (Mainland)
• Production Capacity: 50, 000 PCS Per Day
• Package Size: 10.00cm * 10.00cm * 10.00cm
• Package Gross Weight: 10.000kg

Product Description

  

 

  

• Excellent quality
• Long lasting
• Convenient to use
• Cost efficient

Filter capacitors

Product Introduction:Low voltage filter capacitor is the key component of low voltage filter system. It is made of metallized film, special coating technology and cylindrical aluminum shell structure. It can effectively filter harmonics in power system and has reactive power compensation effect.

Product features:

1, All dry design, no oil leakage, perfect, built-in overpressure protection device, excellent explosion-proof performance;

2, Special design for the form and thickness of the coating for harmonic current, the current capacity is higher than the standard requirements, to ensure that the filter under the condition of load;

3, The filter capacitor is smaller, lighter, only 1/3 of the old product.

4, Perfect safety design, gas protection, longer life.

5, Beautiful appearance, easy to install, aluminum shell.

Product use:

It is mainly used in low voltage distribution system to improve harmonic components in power grid and improve power quality.

These capacitors are used in converters and inverters. They are usually used in equipment for traction vehicles, wind and photovoltaic power plants. Other applications can also be industrial drive inverters. They are usually used in an input filter or an output filter.

In the modern power electronics industry, rectifier and inverter power supply systems have made great progress. In this power supply system, the function of DC support capacitor is to prevent the DC bus and the parasitic inductance of the capacitor from generating induced electromotive force due to the sudden change of load, which leads to the sharp change of DC bus voltage. This paper mainly introduces the scheme of reducing the stray inductance of metallized film DC support capacitor and the discussion of the internal current distribution scheme of the product. The purpose is to ultimately make DC link capacitor products have low heat loss and relatively uniform temperature distribution.

 

DC support capacitor, also known as DC link capacitor. A DC support capacitor belongs to a passive component. DC support capacitor mainly adopts polypropylene film dielectric DC support capacitor, which has the advantages of high voltage resistance, high current resistance, low impedance, low inductance, small capacity loss, small leakage current, good temperature performance, fast charging and discharging speed, long service life (about 100000 hours), good safety and explosion-proof stability, convenient installation without polarity, etc. It is widely used in power electronics industry.

 

Electric action

 

1. in the inverter circuit, the output voltage of rectifier is filtered smoothly.

 

1. absorb the high amplitude pulsating current requested from the inverter from the "DC link", prevent it from generating high amplitude pulsating voltage on the impedance of the "DC link", and keep the voltage fluctuation on the DC bus within the allowable range.

 

1. prevent the impact of voltage overshoot and instantaneous overvoltage from "DC link" on IGBT.

 

Applications

 

New energy industry: photovoltaic inverter, wind power converter, etc.

 

Energy saving industry: high voltage frequency converter, etc.

 

Power industry: large high-frequency switching power supply, uninterruptible power supply UPS, emergency power supply EPS, medium frequency power supply, DC regulated power supply, electroplating power supply, chemical power supply, etc.

 

Power quality industry: dynamic synchronous var compensator SVG, active power filter APF, etc.

 

Automobile industry: pure electric vehicles, hybrid electric vehicles, etc.

 

Electric locomotive industry: locomotive traction converter, Metro, high-speed rail, light rail, tram, etc.

 

The main sources of stray inductance ESL in thin film DC link capacitors are as follows:

 

• The core wound by metallized film is caused by itself;

 

• The core unit is caused by series or parallel leads or copper bars;

 

• Metal shell inductance, which is caused by the connection between an electrode of the product and the metal shell, but not in other cases.

 

With the needs of industrial development and the theme of environmental protection and energy conservation, inverter power supply is used more and more widely, so its technical requirements are more stringent. The quality requirements for its core part, DC link capacitor, have also been improved. By fully considering the influence of the internal core layout of the capacitor, the lead distribution inductance and the heating of magnetic materials, we select more optimized wiring methods and design schemes, so that the DC link capacitor can meet the needs of the continuous development of technology, and in turn promote the progress of technology.

 

More detail of our productrs, please contact us.