Reactor having iron cores and coils

A reactor, comprising:

• a core body, the core body comprising:
• an outer peripheral iron core composed of a plurality of outer peripheral iron core portions, at least three iron cores coupled to the plurality of outer peripheral iron core portions, and coils wound onto the at least three iron cores;
• wherein
• gaps, which can be magnetically coupled, are formed between one of the at least three iron cores and another iron core adjacent thereto, wherein a point of intersection of the gaps is located at a center of the core body;
• the reactor further comprising:
• cover parts which at least partially cover the iron cores and provide insulation from the coils, wherein the cover parts are arranged between the outer peripheral iron core portions and the coils, and
• additional cover parts which at least partially cover the inner surfaces of the outer peripheral iron core portions and provide insulation from the coils, the additional cover parts having shapes corresponding to an inner surface of the outer peripheral iron core, wherein the additional cover parts are attached to an edge portion of the side surfaces of the cover parts.