last highlighted date: 2023-06-08
Highlights
- Figure 1 shows a typical single-phase boost PFC main power stage. In this topology, four things contribute most to consumption:
• Bridge diode loss.
• Inductance loss, including core loss and copper loss.
• Freewheeling diode loss, including conduction loss and reverse-recovery loss (the latter only generated under continuous conduction mode [CCM]).
• Switching device losses, including switching loss, conduction loss and drive loss.
- Tags: pfc
- Note: 4 main power loss causes on pfc
- Different magnetic materials have different features: a ferrite core has a high micro value so you can get high inductance easily, but it is also easily saturated. An alloy-type core has soft saturation characteristics, which means that it would not be saturated even if it passed a short current, a feature very useful in some applications. Table 1 compares the different magnetic materials.
- Tags: inductors