Pfc circuit energy storage

What is power factor correction (PFC)?

Power Factor Correction (PFC) Circuits Power Factor Correction (PFC) Circuits Application Note © 2019 12019-11-06 Toshiba Electronic Devices & Storage Corporation Outline A power factor correction (PFC) circuit is added to a power supply circuit to bring its power factor close to 1.0 or reduce harmonics.

What type of PFC is used for a power supply?

Medium and large power supplies with a capacity greater than 500 W are now widely used. In principle, a multi- phase interleaved PFC may be used for such power supplies, but a large majority of them use a two-phase interleaved PFC circuit like the one shown in Figure 3.2.

What is a power factor (PFC)?

The objective of PFC is to make the input to a power supply look like a simple resistor. This allows the power distribution system to operate more efficiently, reducing energy consumption. The Power Factor is equal to Real Power divided by Apparent Power, as shown in Equation 1.

What is a buck PFC circuit?

In a buck PFC circuit, the output DC voltage is less than the input rectified voltage. Large filters are needed to suppress switching ripples and this circuit produces considerable Power Factor improvement. The switch (MOSFET) is rated to VIN in this case. Figure 8 shows the circuit for the buck PFC stage.

How does PFC work?

The functions are implemented in assembly language and are callable from C routines. The software for PFC has been developed to be used in conjunction with any other application where the first stage remains an AC-to-DC conversion demanding a constant DC voltage and a sinusoidal current wave shape.

What does PFC stand for?

Power Factor Correction (PFC) Circuits Application Note ©2019 19 2019-11-06 Toshiba Electronic Devices & Storage Corporation 2) Boost converters in discontinuous conduction mode (DCM)