| 摘要 |
PURPOSE:To lighten and miniaturize a reactor core without damaging the function of an interphase reactor by bringing the direction of rolling of grain oriented silicon steel plates laminated at a certain angle with the direction of magnetic flux in the reactor core. CONSTITUTION:In a reactor core 1, grain oriented silicon steel plates are used as one part of the core such as an upper yoke 2 in legs 3 and upper and lower yokes 2, 4 shaped by laminating silicon steel plates, the direction Y of the rolling of the grain oriented silicon steel plates is directed at approximately 90 deg. to the direction of magnetic flux phi in the core, and the legs 3 and a lower yoke 4 in the other core component are composed of non-oriented silicon steel plates. The direction of rolling and the direction of magnetic flux do not coincide in the grain oriented silicon steel plates constituting the core 1, and magnetic flux density is reduced extremely in the same magnetizing force in magnetic characteristics at the time of an angle such as 90 deg.. Since DC magnetic flux density by the unbalance section IDX of DC currents penetrating in a window for the reactor core 1 and mutually flowing in the opposite direction is diminished owing to the magnetic characteristics, AC section magnetic flux density can be increased. Accordingly, the sectional area of the reactor core 1 can be minimized, thus miniaturizing and lightening the reactor core.
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