In our investigations, rather than using the LC filter to
attenuate the effect of vrec_ac on the load, we use the LC
filter to shape the rectifier output current irec to be as close as
possible to the desired shape irec_ref, as shown in Fig. 6. As
described by (1) and (2), the fundamental component of vrec_ac
is dominant, and it is in phase with the fundamental component
of the triangular current reference irec_ref, given in (1). The
THD of irec_ref can be calculated based on (1), as 12.12%,
which suggests that the fundamental component of irec_ref is
also dominant.