| 摘要 |
PROBLEM TO BE SOLVED: To relax magnetic coupling between solenoid coils or to make a difference of the magnetic coupling small when a plurality of solenoid coils are used.SOLUTION: The figure shows an example in which three solenoids (reactors A, B and C) are arranged, a core 1 used for each of the solenoid coils is in a "U" shape, and the respective solenoid coils are arranged such that end faces 3 of cores 1 face different directions respectively. Namely, magnetic flux generated by a core of, for example, a rod-like core spreads in the air and the coil is magnetically coupled to a coil of another phase, but the "U"-shaped core can have a spreading range of magnetic flux limited roughly to a core end face 3 of small magnetic resistance. Consequently, magnetic coupling between the solenoid coils is relaxed with the arrangement shown in the figure, thereby making mutual inductance small. |
