Magnetic integrated device

A magnetic integrated device, comprising:

• a first magnetic core plate;
• and
• N magnetic elements arranged in sequence in the same direction, wherein one of the N magnetic elements is connected to the first magnetic core plate, excitation currents of the N magnetic elements have phases different from each other by
• 3
• ⁢
• 6
• ⁢
• 0
• N
• degrees, and excitation directions of adjacent magnetic elements among the N magnetic elements are opposite, N is an integer greater than or equal to 2, and each magnetic element comprises:
• a first magnetic core comprising a first magnetic core body, a first magnetic column and two first side columns, wherein the first magnetic column and the two first side columns are fixed on the same side of the first magnetic core body, the two first side columns are disposed at opposite sides of the first magnetic core body, an outer wall of the first magnetic column and inner walls of the two first side columns form a first accommodating slot, and an extension direction of the first magnetic column is towards the first magnetic core plate;
• and
• a combined winding comprising a secondary winding and a primary winding, wherein the secondary winding and the primary winding are disposed in the first accommodating slot and wound around the first magnetic column.