REACTOR AND POWER CONVERTER USING THE SAME

PROBLEM TO BE SOLVED: To enable the use of the title reactor for a large high-frequency power by a construction wherein a core divided by a plurality of gaps for making a magnetic path have a magnetic reluctance is provided in a solenoid coil and a cooling liquid is made to flow through a cooling piping provided in parallel with the magnetic path of the core, while a packing material being excellent in heat conductivity is packed between the cooling piping and the core. SOLUTION: A coil 1 wound in the shape of a circle forms a cylindrical solenoid and a magnetic flux is generated inside by a current flowing therethrough. In a leg core 2 for forming a magnetic path of this magnetic flux, small gaps for making the magnetic path have a magnetic reluctance are disposed dispersedly. In order to prevent heating of the leg core 2, a rectangular hollow cooling piping 3 is provided in parallel with the magnetic path so that two sides thereof are in close contact with four corner parts of the outer periphery of the leg core 2. Between the cooling piping 3 and the leg core 2, a packing material 4 being excellent in heat conductivity is packed. According to this constitution, a reactor which can be used for a large high-frequency power and which is small in size and causes no problem of induction heating in the periphery is obtained and a power converter can be made small in size.