Why do inverters need filter inductors?

As discussed previously, filter inductors are needed at the output of inverters to reduce the harmonics created by the PWM control of the inverter switches. The filters de-signed in this thesis are designed to keep the switching ripple in the output current be-low 5 %.

Why is the L-filter considered for a simplici-Ty inductor design?

In this thesis the L-filter is considered for simplici-ty and to keep the focus on inductor design. The methods used in this thesis can be adapted for the design of other types of filter.

How do you choose the best inductor?

Therefore, the goal of highest efficiency is met by selecting an induc-tor that provides sufficient inductance to smooth out the ripple current while simultaneously minimizing losses. The inductor must pass the current without saturating the core or over-heating the winding.

How are inductors designed?

The inductors were designed by varying geometric parameters, but the design program can be easily adapted to adjust any parameter of interest. In future it may be of use to incorporate design factors into the design process which can account for the changes in material properties that occur in the manufacturing process.

How can inductor simulation model be used in DC/AC inverters?

Both the design tool and inductor simulation model can be useful in the development of efficient and cost-effective filter inductors for DC/AC inverters. G. Zhang, Z. Li, B. Zhang, and W. A. Halang, “Power electronics converters: Past, present and future,” Renewable and Sustainable Energy Reviews, vol. 81.

Is a filter inductor a true transformer?

r a true transformer, but not for an inductor. The large amount of energy that must be stored in a filter inductor or flyback transformer is in fact stored in an air gap (or other non-magnetic material with Mr = 1) in s