pfc circuit diagram and its principle

The PFC circuit diagram and its principle are as follows: The PFC circuit principle adds a capacitor before inputting the AC voltage to store the charge in advance, thereby reducing the instantaneous current fluctuations in the load.

1. The PFC circuit is a power factor correction circuit, whose function is to improve the power factor of the AC power load.

The traditional AC power load has a low power factor for the power grid, which will cause unnecessary energy loss and grid pollution.

2. The PFC circuit can improve the power factor, reduce energy loss and grid pollution, and improve the stability and life of the equipment by controlling the current waveform.

3. Common PFC circuits include single-stage rectification PFC circuit and double-stage rectification PFC circuit.

Single-stage rectification PFC circuits are usually implemented using a rectifier bridge and DC capacitors, while double-stage rectification PFC circuits add a DC-DC converter to the single-stage rectification PFC circuit to further improve power factor and efficiency.

4. Currently, PFC circuits are widely used in electronic equipment in various fields such as computers, televisions, and lighting.

The invention and development history of PFC circuit: 1. The invention of PFC circuit can be traced back to the 1980s.

Early research was mainly conducted in Europe, and scholars from Germany, Switzerland and other countries made important contributions.

2. Among them, Dr. Konrad Reif of Germany is considered one of the founders of the PFC circuit. He developed the first practical PFC circuit in 1982 and applied for a related patent in 1984.

3. Since then, more and more researchers and companies have joined in the research and application of PFC circuits, gradually promoting the development and popularization of this technology.

Nowadays, PFC circuits have become standard equipment in many electronic products, which is of great significance for improving equipment efficiency and protecting the environment.