Berekening van de energieopslag van de flyback-inductor

What is a flyback converter?

A flyback converter is a type of power converter commonly used in the low- to mid-power range (about 2W to 100W). Its operation is based on a coupled inductor, which aids in power conversion while isolating the converter’s input and output. The coupled inductor also enables multiple outputs, making flyback converters

What is a flyback transformer?

A flyback transformer is a multi-winding coupled inductor. Unlike true transformers, energy storage is undesirable in flyback transformers. Design considerations for this family of inductors vary widely depending on the type of circuit application and factors such as operating frequency and ripple current.

What happens if a flyback transformer is operated in continuous inductor current mode?

When flyback transformers are operated in continuous inductor current mode, the total ampere-turns of all the windings never dwell at zero. However, the current in each winding of any flyback transformer is always highly discontinuous, regardless of inductor current mode.

Does a single winding flyback inductor lose a core?

Yes, a single winding flyback inductor does experience core loss. The core sees the total ampere-turn ripple, leading to core loss that is small in continuous mode and large in discontinuous mode.

How efficient is a low power flyback converter?

The efficiency of a low-power flyback converter is estimated to be about 80%. This is a common value for such converters.

Why do flyback converters lose power?

Losses arise because of the DC component of the current and the DCR of the windings, but also (and often more significantly) from high-frequency AC effects. For flyback converters operating in DCM or transition mode (TM), the current flowing in both the primary and secondary windings is triangular in shape (Figure 3).