Multi-phase coupled inductor, multi-phase coupled inductor array and two-phase inverse coupled inductor

A multi-phase coupled inductor array, comprising:

• a magnetic core, comprising:
• N first horizontal columns;
• M second horizontal columns parallel to and staggered with the N first horizontal columns, wherein M≤N≤(M+1), M≥2, and N and M are both positive integers;
• at least one longitudinal side column connected to first ends of the N first horizontal columns;
• a first connection magnetic column connected to first ends of the M second horizontal columns;
• and
• at least two first longitudinal middle columns and at least one second longitudinal middle column, wherein each of the first longitudinal middle columns is disposed between an ith first horizontal column and an ith second horizontal column, and the second longitudinal middle column is disposed between the ith second horizontal column and an (i+1)th first horizontal column, wherein i=1, . . . , and M;
• and
• a plurality of windings comprising at least two first windings respectively wound around the first longitudinal middle columns and at least one second winding respectively wound around the at least one second longitudinal middle column,
• wherein a magnetic flux direction of a DC magnetic flux generated by a current flowing through any one of the windings is opposite to a magnetic flux direction of a DC magnetic flux generated by a current flowing through other one of the windings, on a longitudinal middle column among the at least two first longitudinal middle columns and at least one second longitudinal middle column, around which the other one of the windings is wound.