What Type of Film Capacitor is the Most Suitable for an Uninterruptible Power Supply (UPS)?　-Suppress noise and voltage fluctuations-

 

What Type of Film Capacitor is the Most Suitable for an Uninterruptible Power Supply (UPS)?
- Suppress noise and voltage fluctuations　-

2024-11-22

  1. What are film capacitors for UPS?
  2. Markets and trends
  3. Circuit configuration of UPS
  4. Summary
  5. Product information related to this article
  6. Related articles
  7. Tags related to this article

A UPS is a device that temporarily supplies power from a battery in the event of a power outage or voltage disturbance to enable computers and other equipment to continue to operate safely. In such devices, film capacitors for UPS are used as input filters, snubbers, or output filters or for smoothening. This article will introduce the general circuits of UPS and electronic components used in the configuration.

What are film capacitors for UPS?

An uninterruptible power supply (UPS) is a device that temporarily provides stable power in the event of a power outage or voltage fluctuation, protecting equipment and allowing it to operate without problems. Film capacitors for UPS have high withstand voltage and excellent temperature characteristics, providing long life and high reliability. Our film capacitors provide stable performance even in the harsh environment of UPS due to a high-reliability design and safety design for its end-of-life stage. They perform functions such as voltage stabilization, noise elimination, and energy storage, contributing to improving the reliability and safety of equipment (UPS).

Markets and trends

In the future, the number of data centers is expected to further increase due to the rapid spread of digital technologies such as cloud computing, AI, and IoT. Therefore, it is necessary to expand or build new data centers to process large amounts of data and secure storage. As data centers are becoming more and more important as infrastructure for various social systems, their high availability is required. In recent years, natural disasters such as earthquakes and lightning have occurred frequently. The demand for UPS is increasing in order to supply power to data centers stably even in such circumstances.

Fig. Changes in the numerical scale of the UPS market (our estimate)
Fig. Changes in the numerical scale of the UPS market (our estimate)

Circuit configuration of UPS

Film capacitors for UPS are used in the following applications:

Application Expected Functions
Input filter They are used in the power input section of the UPS to eliminate the noise of incoming electricity from the outside.
This allows the electronic equipment in the UPS to operate stably.
Snubber Suppress overvoltage and spikes that occur when switches in the power supply circuit are turned on and off.
This function protects the circuit and prevents failures.
Smoothening Convert the power to a smooth direct current.
It stabilizes the power output by the UPS so that connected equipment operates safely.
Output filter Reduce noise and ripples to minimize the impact on load equipment.

The following are circuit examples by UPS output capacity (up to 15 kW, up to 250 kW), recommended series of our film capacitors by application, and their features.

■UPS output capacity: Up to 15 kW

Circuit example
図 UPS出力容量：～15kW 回路例
Recommended capacitors by application
Application ①
Input filter		 ②
Input filter		 ③
Snubber		 ④
Smoothening		 ⑤
Output filter
Series name EZPE
EZPV		 ECWFA
ECWFE
ECWFG		 ECWFA
ECWFE
ECWFG		 EZPE
EZPV		 EZPQ
Rated voltage 450-1300 Vdc 250-1100 Vdc 250-1100 Vdc 450-1300 Vdc 250-600 Vac
Electrostatic capacity range 10μF - 140μF 0.1μF - 12μF 0.1μF - 12μF 10μF - 140μF 1μF-36μF
Appearance Film ( PP ) Film ( PP ) Film ( PP ) Film ( PP ) Film ( PP )
Features
  • High safety (with security apparatus)
  • Long operating life (≧100 kh)
    (vs. electric field cap.10 kh)
  • High humidity resistance
    (85℃, 85%:EZPV only)
  • High safety (with security apparatus)
  • High humidity resistance
    (60℃, 95% or 85℃, 85%)
  • High safety (with security apparatus)
  • High humidity resistance
    (60℃, 95% or 85℃, 85%)
  • High safety (with security apparatus)
  • Long operating life (≧100 kh)
    (vs. electric field cap.10 kh)
  • High humidity resistance
    (85℃, 85%: EZPV only)
  • High safety (with security apparatus)
  • High humidity resistance(60℃, 95%)

■UPS output capacity: Up to 250 kW

Circuit example
UPS output capacity: Up to 15 kW
Recommended capacitors by application
Application ①
Input filter		 ②
Input filter		 ③
Snubber		 ④
Smoothening		 ⑤
Output filter
Series name EZPE
EZPV		 ECWFA
ECWFE
ECWFG		 ECWFA
ECWFE
ECWFG		 EZPE
EZPV		 EZPQ
Rated voltage 450-1300 Vdc 250-1100 Vdc 250-1100 Vdc 450-1300 Vdc 250-600 Vac
Electrostatic capacity range 10μF - 140μF 0.1μF - 12μF 0.1μF - 12μF 10μF - 140μF 1μF-36μF
Appearance Film ( PP ) Film ( PP ) Film ( PP ) Film ( PP ) Film ( PP )
Features
  • High safety(with security apparatus)
  • Long operating life(≧100 kh)
    (vs. electric field cap.10 kh)
  • High humidity resistance
    (85℃, 85%:EZPV only)
  • High safety(with security apparatus)
  • High humidity resistance
    (60℃, 95% or 85℃, 85%)
  • High safety(with security apparatus)
  • High humidity resistance
    (60℃, 95% or 85℃, 85%)
  • High safety(with security apparatus)
  • Long operating life(≧100 kh)
    (vs. electric field cap.10 kh)
  • High humidity resistance
    (85℃, 85%: EZPV only)
  • High safety(with security apparatus)
  • High humidity resistance(60℃, 95%)

Summary

A UPS is a device that temporarily provides stable power and protects equipment in the event of a power outage or voltage fluctuation. Film capacitors used in a UPS perform functions such as noise reduction and voltage stabilization. In the future, as the demand for UPS will increase with the advancement of cloud technology and expansion of data centers, film capacitors for UPS will also be more important. As our film capacitors are designed with high reliability to be safe at their end-of-life stage, they will contribute to the improvement of the reliability and safety of equipment (UPS).

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