## What is passive power factor correction?

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A passive PFC uses a filter at the AC input to correct poor power factor. The passive PFC circuitry uses only passive components — an inductor and some capacitors (Figure. 1). Although pleasantly simple and robust, a passive PFC rarely achieves low Total Harmonic Distortion (THD).

**What is a good power factor correction?**

The ideal power factor is unity, or one. Anything less than one means that extra power is required to achieve the actual task at hand. All current flow causes losses both in the supply and distribution system. A load with a power factor of 1.0 results in the most efficient loading of the supply.

### How does a power factor correction circuit work?

A power factor correction (PFC) circuit reduces the harmonic distortion in the supply current and creates a current waveform close to a fundamental sine wave in order to increase the power factor to unity (1).

**What is power factor correction module?**

The PFCQor® Power Factor Correction module is an essential building block of an AC-DC power supply. Used in conjunction with a hold-up capacitor, SynQor’s high efficiency DC-DC converters and SynQor’s AC line filter, the PFCQor will draw a nearly perfect sinusoidal current (PF>0.99) from a single phase AC input.

#### Does power factor Correction save energy?

Power factor correction actually does not save much energy (usually less than 1% of load requirements), and even that reduction depends on how low the power factor is to begin with and how heavily loaded inductive devices are in the distribution system.

**Can power factor be more than 1?**

True power may be equal to apparent power but cannot exceed. So that is why power factor can not more than unity. The defination of power factor is the cosine angle between voltage and current but maximum cosine value is 1 and minimum is -1. So power factor above 1 is impossible.

## Why power factor correction is required?

Power factor correction (PFC) aims to improve power factor, and therefore power quality. It reduces the load on the electrical distribution system, increases energy efficiency and reduces electricity costs. It also decreases the likelihood of instability and failure of equipment.

**Why power factor correction is necessary?**