Reactor, converter, and power conversion device

A reactor comprising a coil and a magnetic core,

• wherein the coil includes a winding portion,
• the number of winding portions is one,
• an outer circumferential surface of the winding portion includes a portion that contacts an installation target for the reactor,
• the magnetic core includes:
• an E-shaped first core portion and a T-shaped second core portion combined in an axial direction of the winding portion;
• and
• a gap portion provided between the first core portion and the second core portion,
• the first core portion is formed of a molded body made of a composite material in which a first end core portion facing a first end surface of the winding portion, a first middle core portion having a portion disposed inside the winding portion, and a first side core portion and a second side core portion disposed on an outer circumference of the winding portion so as to sandwich the first middle core portion are integrated,
• the second core portion is formed of a powder compact in which a second end core portion facing a second end surface of the winding portion and a second middle core portion having a portion disposed inside the winding portion are integrated,
• a length of the second middle core portion in the axial direction of the winding portion is shorter than a length of the first middle core portion in the axial direction of the winding portion,
• the gap portion is disposed between the first middle core portion and the second middle core portion inside the winding portion,
• a length from the second end surface to the gap portion is 0.2 times or more and 0.49 times or less a length of the winding portion, and
• a total volume Va of a volume of the first core portion, a volume of the second core portion, and a volume of the gap portion is 50 cm3 or more and 500 cm3 or less.