![]() Inductance loss, including core loss and copper loss.In this topology, four things contribute most to consumption: In this post, I’ll explain how to select and design an efficient and cost-competitive PFC choke to improve the efficiency of the PFC power stage.įigure 1 shows a typical single-phase boost PFC main power stage. PFC circuit performance has continually improved through the use of better switching parts (field effect transistors and diodes), the development of improved magnetic parts materials, and the application of circuit structure research. The efficiency of the PFC power stage is important to overall PSU performance. Because medium- and high-capacity PSUs with power ratings of hundreds of watts or more require high power-factor performance, such devices have two-stage structures that include a power factor correction (PFC) circuit. Power-supply unit (PSU) efficiency enhancement has been an important research goal in the development of systems that consume significant amounts of power. Air conditioners are already fully regulated, but other motorized appliances such as ceiling fans, vacuum cleaners or refrigerators will likely be next. As losses in the grid increase due to bad power factor (PF), mandates call for more and more end equipment to comply with stringent target values. ![]()
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