Static Var Generator Capacitors DC-Link Capacitor Cylindrical Aluminum Can for Power equipment Photovoltaic Wind Power Storage

• 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: 50.00cm * 25.00cm * 30.00cm
• Package Gross Weight: 20.000kg

Product Description

 
  

• Compensate for the difference between the power required by the inverter and the output power of the rectifier bridge that changes by two or six times the power frequency;

 

• Provide input current of switching frequency of inverter or freight frequency converter;

 

• Reduce the current harmonic of switching frequency into the power grid;

 

• Absorb the demagnetization energy of the motor when all power switching devices are turned off in the emergency stop state;

 

• Provide instantaneous peak power;

 

• Protect the inverter or frequency converter from the impact of the instantaneous peak value of the power grid.

 

  

How to Choose the Right Capacitor for DC Link Applications

 

Thanks to advances in power semiconductor technology and improvements in circuit topology, today's inverter and switching power supply circuits are delivering higher performance at an unprecedented rate. Efficiency has been improved, standby power consumption is quickly moving into the green energy zone, and physical circuit sizes are shrinking. Even life expectancy has been improved.

 

Behind this performance push are changing application areas. Smaller power supplies and inverters are better suited to shrinking consumer and industrial products. Once limited in market scope, inverters are now at the heart of every solar, wind and hydro energy system as well as UPS devices, portable power supplies and more. In addition, product reliability is critical in many critical applications.

 

While much of these improvements can be attributed to semiconductor manufacturers and their application engineers, significant advances in capacitor technology have also been made. Aluminum electrolytic capacitors have been the backbone of power supply design for many years, and they remain the best choice for many applications.

 

While we haven't seen any revolutionary leaps in aluminum electrolytic technology, there have been many technological developments over the years. This creep has made them smaller, more reliable, and with lower ESR and ripple current ratings. The latter two are particularly important for any power supply circuit that employs DC-link circuits. This, of course, includes switching power supplies and inverters.

 

Power supply metallized film capacitors are advancing even faster than electrolytic capacitors. We have seen evolutionary improvements in film materials, metallization and overall device construction. While metallized power film and electrolytic capacitors have some overlapping applications, each case has a best-fit scenario. In addition, film capacitors can be used for a wider range of shape factors and terminations.

 

What is a DC link?

 

A DC link (also known as a bus link) ) circuit is primarily used to balance transient power variations between an input source and an output load or power supply circuit (Figure 1). In the example of a switching power supply, AC power is converted to DC without passing through a transformer and is fed to a high frequency power oscillator. After rectification, a DC bus capacitor is applied from the positive to the negative terminal. In the power inverter, the DC link capacitor is placed in parallel with the input to minimize the effect of voltage variations as the load changes. The DC link capacitor also provides a low impedance path for the ripple current generated by the power switching circuit.

 

Conclusion

 

Choosing the best capacitor for a power inverter or other DC link application usually begins with comparing the capacitance and ripple current required. Make sure that the specifications you are comparing reference the same operating criteria. When starting with a semiconductor manufacturer's application circuit, use the recommended dielectric technology, as different circuit topologies may not match different capacitor technologies. Compare the cost of the minimum ripple current required for the expected product life based on voltage and capacitance requirements.

 

For more information about 1100VDC DC link capacitors 420uf for power equipment management  photovoltaic wind power storage, we are glad to answer for you.

 

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