Ceramic CapacitorIntroducing Ceramic Capacitors for Use in Factory Automation (FA)

The above figure shows a general block diagram illustrating factory automation.

FA is made up of PLCs, inverter drivers, AC servomotors, various power supplies, and other devices.

This page provides circuit examples for AC/DC and DC/DC converters, examples of inverter circuits, and examples of power supplies for circuit breakers.

The above is an example of a general circuit for an AC/DC converter and a DC/DC converter.

(1) Safety Certified capacitors are required for AC line filters (C1, C2) and coupling capacitors (C3) in primary and secondary coupling.

Our new products rated at AC 400 V and AC 500 V are suitable for AC 400-V and AC 690-V AC/DC converters.

(2) Low-loss capacitors are required for snubber capacitors (C5, C6), since high-frequency switching is applied.

Accordingly, temperature compensation-type (Class 1) capacitors are recommended.

On the other hand, for C7, high capacity is required since high frequency noise components must be removed. For this, high dielectric constant (Class 2) capacitors are recommended.

(3) Relatively large-capacity capacitors are required for smoothing capacitors (C4, C8) to remove low-frequency noise.

The above is an example of a general circuit for an inverter.

Removal of the high-frequency noise component is required for snubber capacitors (C1).

The above example shows a power supply used in a circuit breaker.

(1) Smoothing capacitors (C1) must be relatively large capacitors to eliminate low frequency noise.

(2) Primary and secondary coupling capacitors (C2) must be capacitors that have obtained safety standard certification.
AC 500-V and AC 400-V rated products are suitable for supplying power to breakers through high impulse resistance.